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Command Strobe/CSMA-CA Processor
Condition Description Function
Code C
000 CCA is true CCA = 1
001 Synchronization word SFD = 1
received and still receiving
packet or synchronization
word transmitted and still
transmitting packet
010 CPU control true
CSPCTRL.CPU_CTRL = 1
011 Reserved
100 Register X = 0 X = 0
101 Register Y = 0 Y = 0
110 Register Z = 0 Z = 0
111 RSSI is valid
RSSI_VALID = 1
Operation: PC = PC + S + 1 when (C XOR N) = true
PC = PC + 1 when (C XOR N) = false
Opcode: 0x00 | S | N | C
7 6 5 4 3 2 1 0
0 S N C
23.14.9.18 STOP
Function: Stop program execution
Description: The SSTOP instruction stops the CSP program execution.
Operation: Stop execution
Opcode: 0xD2
7 6 5 4 3 2 1 0
1 1 0 1 0 0 1 0
23.14.9.19 SNOP
Function: No operation
Description: Operation continues at the next instruction.
Operation: PC = PC + 1
Opcode: 0xD0
7 6 5 4 3 2 1 0
1 1 0 1 0 0 0 0
23.14.9.20 SRXON
Function: Enable and calibrate frequency synthesizer for RX
Description: The SRXON instruction asserts the output FFCTL_SRXON_STRB to enable and
calibrate the frequency synthesizer for RX. The instruction waits for the radio to
acknowledge the command before executing the next instruction.
Operation: SRXON
259
SWRU191C–April 2009–Revised January 2012 CC253x Radio
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