Instruction Set Summary - Texas Instruments CC253x User Manual

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CSPSTAT (0x61E1) – CSP Status Register
Bit Name Reset
7:6 – 00
5 0
CSP_RUNNING
4:0 0 0000
CSP_PC
CSPX (0x61E2) – CSP X Register
Bit Name Reset
7:0 CSPX 0x00
CSPY (0x61E3) – CSP Y Register
Bit Name Reset
7:0 CSPY 0x00
CSPZ (0x61E4) – CSP Z Register
Bit Name Reset
7:0 CSPZ 0x00
CSPT (0x61E5) – CSP T Register
Bit Name Reset
7:0 CSPT 0xFF

23.14.8 Instruction Set Summary

This section gives an overview of the instruction set. This is intended as a summary and definition of
instruction opcodes. See
one byte, which is written to the RFST register to be stored in the instruction memory.
The Immediate Strobe instructions (ISxxx) are not used in a program. When these instructions are written
to the RFST register, they are executed immediately. If the CSP is already executing a program, the
current instruction is delayed until the immediate strobe instruction has completed.
For undefined opcodes, the behavior of the CSP is defined as a no-operation strobe command (SNOP).
SWRU191F – April 2009 – Revised April 2014
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R/W Description
R0 Reserved. Read as 0
R 1: CSP is running.
0: CSP is idle.
R CSP program counter
R/W Description
R/W CSP X data register. Used by CSP instructions WAITX, RANDXY, INCX, DECX,
and conditional instructions
R/W Description
R/W CSP Y data register. Used by CSP instructions RANDXY, INCY, DECY, and
conditional instructions
R/W Description
R/W CSP Z data register. Used by CSP instructions INCZ, DECZ, and conditional
instructions
R/W Description
R/W CSP T data register. Content is decremented each time the MAC Timer
overflows while the CSP program is running. The SCP program stops when
decremented to 0. Setting CSPT = 0xFF prevents the register from being
decremented.
Section 23.14.9 for a description of each instruction. Each instruction consists of
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Command Strobe Processor
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