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23.10.3 RSSI ............................................................................................................ 244
23.10.4 Link Quality Indication ....................................................................................... 245
23.11 Radio Control State Machine .......................................................................................... 245
23.12 Random-Number Generation .......................................................................................... 247
23.13 Packet Sniffing and Radio Test Output Signals ..................................................................... 248
23.14 Command Strobe/CSMA-CA Processor .............................................................................. 249
23.14.1 Instruction Memory ........................................................................................... 249
23.14.2 Data Registers ................................................................................................ 250
23.14.3 Program Execution ........................................................................................... 250
23.14.4 Interrupt Requests ............................................................................................ 250
23.14.5 Random Number Instruction ................................................................................ 250
23.14.6 Running CSP Programs ..................................................................................... 250
23.14.7 Registers ...................................................................................................... 251
23.14.8 Instruction Set Summary .................................................................................... 252
23.14.9 Instruction Set Definition ..................................................................................... 254
23.15 Registers .................................................................................................................. 266
23.15.1 Register Settings Update .................................................................................... 267
23.15.2 Register Access Modes ..................................................................................... 267
23.15.3 Register Descriptions ........................................................................................ 268
24 CC2540/CC2541 Bluetooth low energy Radio ........................................................................ 287
24.1 Registers .................................................................................................................. 288
25 CC2541 Proprietary Mode Radio ........................................................................................ 291
25.1 RF Core ................................................................................................................... 292
25.2 Interrupts .................................................................................................................. 292
25.2.1 Interrupt Registers ............................................................................................. 292
25.3 RF Core Data Memory .................................................................................................. 293
25.3.1 FIFOs ............................................................................................................ 294
25.3.2 DMA ............................................................................................................. 297
25.3.3 RAM-Based Registers ......................................................................................... 298
25.3.4 Variables in RAM Page 5 ..................................................................................... 304
25.4 Bit-Stream Processor .................................................................................................... 304
25.4.1 Whitening ....................................................................................................... 304
25.4.2 CC2500-Compatible PN9 Whitening ........................................................................ 305
25.4.3 CRC .............................................................................................................. 306
25.4.4 Coprocessor Mode ............................................................................................. 308
25.5 Frequency and Channel Programming ................................................................................ 309
25.6 Modulation Formats ...................................................................................................... 309
25.7 Receiver ................................................................................................................... 309
25.8 Packet Format ............................................................................................................ 310
25.8.1 Rx FIFO Packet Organization ................................................................................ 312
25.8.2 Tx FIFO Packet Organization ................................................................................ 313
25.8.3 Tx Buffers for ACK Payload .................................................................................. 313
25.9 Link Layer Engine ........................................................................................................ 314
25.9.1 Command Register ............................................................................................ 315
25.9.2 Radio Tasks .................................................................................................... 315
25.9.3 RF Test Commands ........................................................................................... 329
25.10 Random Number Generation .......................................................................................... 330
25.11 Packet Sniffing ........................................................................................................... 331
25.12 Registers .................................................................................................................. 332
25.12.1 Register Overview ............................................................................................ 332
25.12.2 Register Settings Update .................................................................................... 333
25.12.3 SFR Register Descriptions .................................................................................. 334
26 Voltage Regulator ............................................................................................................ 355
9
SWRU191C–April 2009–Revised January 2012 Contents
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