Revision 1.1 5 of 191
nRF24LE1 Preliminary Product Specification
4.3 Functional description .......................................................................... 56
4.3.1 Arithmetic Logic Unit (ALU) ............................................................. 56
4.3.2 Instruction set summary .................................................................. 56
4.3.3 Opcode map .................................................................................... 60
5 Memory and I/O organization................................................................... 62
5.1 PDATA memory addressing................................................................. 63
5.2 MCU Special Function Registers ......................................................... 63
5.2.1 Accumulator - ACC ......................................................................... 63
5.2.2 B Register – B ................................................................................. 63
5.2.3 Program Status Word Register - PSW ............................................ 64
5.2.4 Stack Pointer – SP .......................................................................... 64
5.2.5 Data Pointer – DPH, DPL ................................................................ 64
5.2.6 Data Pointer 1 – DPH1, DPL1 ......................................................... 65
5.2.7 Data Pointer Select Register – DPS................................................ 65
5.2.8 PCON register ................................................................................. 65
5.2.9 Special Function Register Map........................................................ 66
5.2.10 Special Function Registers reset values ......................................... 67
6 Flash memory............................................................................................ 70
6.1 Features ............................................................................................... 70
6.2 Block diagram ...................................................................................... 70
6.3 Functional description .......................................................................... 70
6.3.1 Flash memory configuration ............................................................ 71
6.3.2 Brown-out ........................................................................................ 75
6.3.3 Flash programming from the MCU .................................................. 75
6.3.4 Flash programming through SPI...................................................... 76
6.3.5 Hardware support for firmware upgrade.......................................... 80
7 Random Access memory (RAM).............................................................. 83
7.1 SRAM configuration ............................................................................. 83
8 Timers/counters ........................................................................................ 85
8.1 Features ............................................................................................... 85
8.2 Block diagram ...................................................................................... 85
8.3 Functional description .......................................................................... 86
8.3.1 Timer 0 and Timer 1 ........................................................................ 86
8.3.2 Timer 2 ............................................................................................ 88
8.4 SFR registers ....................................................................................... 89
8.4.1 Timer/Counter control register – TCON........................................... 89
8.4.2 Timer mode register - TMOD........................................................... 90
8.4.3 Timer0 – TH0, TL0 .......................................................................... 90
8.4.4 Timer1 – TH1, TL1 .......................................................................... 90
8.4.5 Timer 2 control register – T2CON ................................................... 91
8.4.6 Timer 2 – TH2, TL2 ......................................................................... 91
8.4.7 Compare/Capture enable register – CCEN ..................................... 92
8.4.8 Capture registers – CC1, CC2, CC3 ............................................... 92
8.4.9 Compare/Reload/Capture register – CRCH, CRCL ........................ 93
8.5 RTC2.................................................................................................... 93
8.5.1 Features .......................................................................................... 93
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