Revision 1.2 5 of 195
nRF24LE1 Product Specification
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 .......................................................................... 71
6.3.1 Using the NV data memory ............................................................. 71
6.3.2 Flash memory configuration ............................................................ 71
6.3.3 Brown-out ........................................................................................ 76
6.3.4 Flash programming from the MCU .................................................. 77
6.3.5 Flash programming through SPI...................................................... 77
6.3.6 Hardware support for firmware upgrade.......................................... 81
7 Random Access memory (RAM).............................................................. 84
7.1 SRAM configuration ............................................................................. 84
8 Timers/counters ........................................................................................ 86
8.1 Features ............................................................................................... 86
8.2 Block diagram ...................................................................................... 86
8.3 Functional description .......................................................................... 87
8.3.1 Timer 0 and Timer 1 ........................................................................ 87
8.3.2 Timer 2 ............................................................................................ 89
8.4 SFR registers ....................................................................................... 91
8.4.1 Timer/Counter control register – TCON........................................... 91
8.4.2 Timer mode register - TMOD........................................................... 92
8.4.3 Timer 0 – TH0, TL0 ......................................................................... 92
8.4.4 Timer 1 – TH1, TL1 ......................................................................... 92
8.4.5 Timer 2 control register – T2CON ................................................... 93
8.4.6 Timer 2 – TH2, TL2 ......................................................................... 93
8.4.7 Compare/Capture enable register – CCEN ..................................... 94
8.4.8 Capture registers – CC1, CC2, CC3 ............................................... 94
8.4.9 Compare/Reload/Capture register – CRCH, CRCL ........................ 95
8.5 Real Time Clock - RTC ........................................................................ 95
8.5.1 Features .......................................................................................... 95
