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Product Specification 2011 Nov 17
Confidential
PCF7961XTT
Security Transponder, Micro-RISC Kernel and Radio
Transmitter (SMART)
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NXP Semiconductors Product Specification
SMART PCF7961XTT
2011 Nov 17 2 Confidential
CONTENTS
1 FEATURES .................................................................................................................................................................................. 6
Calculation Unit ................................................................................................................................................................. 6
Security Transponder Emulation ....................................................................................................................................... 6
RISC Controller ................................................................................................................................................................. 6
UHF Transmitter ............................................................................................................................................................... 6
2 GENERAL DESCRIPTION .......................................................................................................................................................... 6
3 ORDERING INFORMATION ....................................................................................................................................................... 7
4 TYPICAL APPLICATION ............................................................................................................................................................. 7
5 BLOCK DIAGRAM ....................................................................................................................................................................... 8
Contactless Interface ........................................................................................................................................................ 8
Power Management .......................................................................................................................................................... 8
Calculation Unit ................................................................................................................................................................. 8
Test/Debug Logic .............................................................................................................................................................. 8
RISC Controller ................................................................................................................................................................. 8
UHF Transmitter ............................................................................................................................................................... 8
6 QUICK REFERENCE DATA ........................................................................................................................................................ 9
Transponder Emulation..................................................................................................................................................... 9
RISC Operation ................................................................................................................................................................ 9
UHF Transmitter ............................................................................................................................................................. 10
7 PINNING .................................................................................................................................................................................... 11
8 POWER MANAGEMENT DESCRIPTION ................................................................................................................................. 12
8.1 Supply Switch Logic .......................................................................................................................................................... 13
Presence of LF Field ........................................................................................................................................... 13
Port Wake Up (button press) ............................................................................................................................... 13
Presence of LF Field and Port Wake Up (button press) ...................................................................................... 13
8.2 Device Operating Modes ................................................................................................................................................... 14
8.2.1 POWER-OFF Mode ............................................................................................................................................... 14
8.2.2 BATTERY Mode .................................................................................................................................................... 15
8.2.3 TRANSPONDER Mode ......................................................................................................................................... 15
8.3 Port Sense Logic ............................................................................................................................................................... 16
8.4 Power Management Control Register ............................................................................................................................... 17
FLD, Field Detected ............................................................................................................................................ 17
PMODE, Power Mode ......................................................................................................................................... 17
PBAT, Power from Battery .................................................................................................................................. 17
PLF, Power from LF Field ................................................................................................................................... 17
RST, RESET device ........................................................................................................................................... 17
NMI, Non Maskable Interrupt control .................................................................................................................. 17
IDLE, IDLE Mode ................................................................................................................................................ 18
9 CONTACTLESS INTERFACE DESCRIPTION .......................................................................................................................... 18
9.1 LF Rectifier and Voltage Limiter ........................................................................................................................................ 18
9.2 Modulator .......................................................................................................................................................................... 18
9.3 Demodulator ...................................................................................................................................................................... 20
LFEN, LF Demodulator Enable ........................................................................................................................... 20
LFD, LF Demodulator Data ................................................................................................................................. 20
9.4 LF Field Detection ............................................................................................................................................................. 21
FLD, Field Detected ............................................................................................................................................ 21
10 RISC CONTROLLER DESCRIPTION ..................................................................................................................................... 22
10.1 Application Code Memory ............................................................................................................................................... 22
10.2 System Code Memory ..................................................................................................................................................... 22
Boot Routine ....................................................................................................................................................... 23
ROM Library ........................................................................................................................................................ 23
In-Circuit Monitor and Download Routine ............................................................................................................ 23
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NXP Semiconductors Product Specification
SMART PCF7961XTT
2011 Nov 17 3 Confidential
10.3 Data Memory ................................................................................................................................................................... 23
11 PERIPHERIAL DESCRIPTION ................................................................................................................................................ 24
11.1 EEPROM ......................................................................................................................................................................... 25
11.1.1 Organisation ........................................................................................................................................................ 25
11.1.1.1 Identifier, IDE ........................................................................................................................................ 25
11.1.1.2 Device Configuration Page, DCFG ....................................................................................................... 25
TEN, Transponder Emulation Enable .................................................................................................... 26
11.1.2 High-Level EEPROM Access ............................................................................................................................... 26
11.1.3 Low-Level EEPROM Access ................................................................................................................................ 26
Read Operation ..................................................................................................................................... 27
Write Operation ..................................................................................................................................... 27
POEE, Power On EEPROM .................................................................................................................. 28
PG[6…0], Page Address ....................................................................................................................... 28
BYTE[1…0], Byte Address .................................................................................................................... 28
BIT[2…0], Bit Address ........................................................................................................................... 28
WR, Select Write/Read .......................................................................................................................... 28
EEIO, EEPROM Data I/O ...................................................................................................................... 28
BUSY, Busy ........................................................................................................................................... 29
PERR, Programming Error .................................................................................................................... 29
11.2 Interrupt System and IDLE Control .................................................................................................................................. 30
11.2.1 Interrupt Enable Register ..................................................................................................................................... 31
11.2.2 Interrupt Request Flags ....................................................................................................................................... 31
11.2.3 Interrupt Source Assignment ............................................................................................................................... 31
11.2.4 Interrupt Service .................................................................................................................................................. 31
11.2.5 IDLE mode ........................................................................................................................................................... 31
11.3 System Clock Generation ................................................................................................................................................ 33
CSL[2...0], Clock Select ...................................................................................................................................... 33
IDLE Mode .......................................................................................................................................................... 34
T
REF
, Reference Clock ........................................................................................................................................ 34
11.4 Timer/Counter 0 .............................................................................................................................................................. 35
TCS[1…0], Timer/Counter 0 Clock Source ......................................................................................................... 35
TPS[2…0], Timer/Counter 0 Prescaler ............................................................................................................... 35
TRS0, Timer/Counter 0 Run/Stop ....................................................................................................................... 36
TR0, Timer/Counter 0 Reload ............................................................................................................................. 36
T0, Timer/Counter 0 Counter Register ................................................................................................................ 36
11.5 Timer/Counter 1 .............................................................................................................................................................. 37
T1CLS[1,0], Timer/Counter 1 Clock Source ........................................................................................................ 37
T1S[2…0], Timer/Counter 1 Prescaler Select ..................................................................................................... 37
T1RUN, Timer/Counter 1 Run/Stop .................................................................................................................... 38
T1CMP, Timer/Counter 1 Compare Register ...................................................................................................... 38
T1PWM, Timer/Counter 1 Pulse Width Modulation Control ................................................................................ 39
T1CAP, Timer/Counter 1 Capture Register......................................................................................................... 40
T1CSS, Timer/Counter 1 Capture Source Select ................................................................................................ 40
T1CR and T1CF, Timer/Counter 1 Capture Configuration .................................................................................. 41
T1CM, Timer/Counter 1 Capture Manual ............................................................................................................ 41
T1OTC, Timer/Counter 1 One Time Capture ...................................................................................................... 41
T1RC, Timer/Counter 1 Reset Capture ............................................................................................................... 41
T1RES, Timer/Counter 1 Reset .......................................................................................................................... 42
T1RCMP, Timer/Counter 1 Reset Upon Compare .............................................................................................. 42
T1RCAP, Timer/Counter 1 Reset Upon Capture ................................................................................................ 42
11.6 Watchdog Timer, WT ...................................................................................................................................................... 43
WPS[2…0], Watchdog Prescaler Select ............................................................................................................. 43
WCLR, Watchdog Clear ...................................................................................................................................... 43
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NXP Semiconductors Product Specification
SMART PCF7961XTT
2011 Nov 17 4 Confidential
11.7 I/O Ports .......................................................................................................................................................................... 44
P10, P11, P14 to P16, P21 and P22, Wake-Up Sense and Port Interrupt .......................................................... 45
P15, External Clock Input .................................................................................................................................... 45
P16, Voltage Comparator Input ........................................................................................................................... 45
P17, P20, Digital Modulator Output ..................................................................................................................... 45
P21, Timer 1 Capture Trigger Input .................................................................................................................... 45
P22, Timer 1 PWM Output .................................................................................................................................. 45
11.7.1 PxDIR, Port Direction Control .............................................................................................................................. 46
IO2x, Port Direction Control ................................................................................................................... 46
P21WD, Port 21 Wake Up Disable ........................................................................................................ 46
P2CIS, Port 2 Capture Input Source ...................................................................................................... 46
11.7.2 PxOUT, Port Output Control ................................................................................................................................ 46
11.7.3 PxINS, Port Input Sense ...................................................................................................................................... 46
11.8 Digital Modulator ............................................................................................................................................................. 47
EP17, Enable P17 ............................................................................................................................................... 47
EP20, Enable P20 ............................................................................................................................................... 47
ETP, Enable Transponder .................................................................................................................................. 47
EAM, Enable Amplitude Modulation .................................................................................................................... 47
EFM, Enable Frequency Modulation ................................................................................................................... 47
TSEL, Timer Select ............................................................................................................................................. 48
MDB, Modulator Data Bit .................................................................................................................................... 48
SCEN, Sub-Carrier Enable ................................................................................................................................. 48
11.9 Voltage Comparator ........................................................................................................................................................ 50
VSEN, Voltage Comparator Enable .................................................................................................................... 50
ISEL, Input Select ............................................................................................................................................... 50
VCMP, Voltage Compare .................................................................................................................................... 51
VST, Reference Voltage Set ............................................................................................................................... 51
11.10 Calculation Unit ............................................................................................................................................................. 52
Function 0, Load 16-HITAG2 .............................................................................................................................. 54
Function 1, Load 16-Enhanced ........................................................................................................................... 54
Function 2, Load 0-HITAG2 ................................................................................................................................ 55
Function 3, Load 0-Enhanced ............................................................................................................................. 55
Function 4, LF-HITAG2 ....................................................................................................................................... 56
Function 5, LF-Enhanced .................................................................................................................................... 56
Function 6, OWF-HITAG2 ................................................................................................................................... 57
Function 7, OWF-Enhanced ................................................................................................................................ 57
12 UHF TRANSMITTER DECRIPTION ........................................................................................................................................ 58
12.1 XTAL Oscillator ............................................................................................................................................................... 59
12.2 PLL Synthesizer .............................................................................................................................................................. 60
12.3 Power Amplifier ............................................................................................................................................................... 60
12.4 Control Logic ................................................................................................................................................................... 61
12.4.1 Transmitter Set-Up and General Control ............................................................................................................. 61
FBSL, PLL Feedback Select ................................................................................................................. 61
VOSL, VCO Output Select .................................................................................................................... 61
OG, XTAL Oscillator Gain Control ......................................................................................................... 62
XCD, XTAL Clock Divider ...................................................................................................................... 62
XEN, XTAL Oscillator Enable ................................................................................................................ 62
TXON, Transmitter Power On ............................................................................................................... 62
12.4.2 XTAL Oscillator Control and FSK Modulation ...................................................................................................... 63
XFC[5…0], XTAL Oscillator Frequency Control ..................................................................................... 63
XFCS, XTAL Frequency Control Select ................................................................................................. 63
TM, Transparent Mode .......................................................................................................................... 63
12.4.3 Power Amplifier Control and ASK Modulation ...................................................................................................... 65
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NXP Semiconductors Product Specification
SMART PCF7961XTT
2011 Nov 17 5 Confidential
AMH[3…0], Amplitude Modulation HIGH ............................................................................................... 65
AML[3…0], Amplitude Modulation LOW ................................................................................................ 65
PAM[1,0], Power Amplifier Mode ........................................................................................................... 66
13 DEVICE MODES ..................................................................................................................................................................... 67
INIT Mode ....................................................................................................................................................................... 67
PROTECTED Mode ........................................................................................................................................................ 67
TAMPERED Mode .......................................................................................................................................................... 67
VIRGIN Mode ................................................................................................................................................................. 67
14 BOOT ROUTINE ..................................................................................................................................................................... 68
14.1 Functional Description ..................................................................................................................................................... 68
14.2 Execution Time ............................................................................................................................................................... 69
Presence of LF Field ........................................................................................................................................... 69
Port Wake Up (button press) ............................................................................................................................... 70
Presence of LF Field and Port Wake Up (button press) ...................................................................................... 70
15 MONITOR AND DOWNLOAD INTERFACE ............................................................................................................................ 71
16 EEPROM CONTENT AT DELIVERY ....................................................................................................................................... 71
17 LIMITING VALUES .................................................................................................................................................................. 72
18 ELECTRICAL CHARACTERISTICS ........................................................................................................................................ 73
18.1 Operating Conditions ....................................................................................................................................................... 73
18.2 AC/DC Characteristics .................................................................................................................................................... 75
18.3 UHF Transmitter Operating Conditions ........................................................................................................................... 78
18.4 UHF Transmitter AC/DC Conditions ................................................................................................................................ 79
19 TIMING CHARACTERISTICS ................................................................................................................................................. 81
19.1 General ........................................................................................................................................................................... 81
19.2 Contactless Interfaces ..................................................................................................................................................... 83
20 TEST SETUP ........................................................................................................................................................................... 84
21 ANOMALY NOTES .................................................................................................................................................................. 85
21.1 Reading of UHF Transmitter is not supported with LF Field supply ................................................................................. 85
22 APPLICATION NOTES ............................................................................................................................................................ 86
22.1 Selecting the capacitor C
VFLD
properly ............................................................................................................................. 86
22.2 Avoid leakage current in POWER-OFF mode ................................................................................................................. 86
22.3 LED output configuration ................................................................................................................................................. 86
22.4 Avoid device Lock-Up in INIT .......................................................................................................................................... 86
22.5 Entering POWER-OFF Mode .......................................................................................................................................... 86
22.6 Entering TRANSPONDER Mode..................................................................................................................................... 87
22.7 Avoid accidental device Wake Up ................................................................................................................................... 87
22.8 Usage of control bit NMI .................................................................................................................................................. 88
22.9 Device operating mode after battery power-up ................................................................................................................ 88
22.10 Controlling the XTAL Oscillator Gain properly ............................................................................................................... 88
22.11 System Test by monitoring internal clock signals .......................................................................................................... 88
23 RELATED DOCUMENTS ........................................................................................................................................................ 89
24 DEVELOPMENT TOOLS ......................................................................................................................................................... 89
25 REVISION HISTORY ............................................................................................................................................................... 89
26 LEGAL INFORMATION ........................................................................................................................................................... 90
26.1 Data sheet status ............................................................................................................................................................ 90
26.2 Definitions ....................................................................................................................................................................... 90
26.3 Disclaimers ...................................................................................................................................................................... 90
27 Contact information .................................................................................................................................................................. 91