CHAPTER 3 CPU FUNCTION
User’s Manual U12688EJ4V0UM00
101
[Example of Description]
ST reg_code, PRCMD
; PRCMD write
(reg_code: Registration code)
ST data, PSC
; Setting of the PSC register
NOP
; Dummy instruction (1 instruction)
(next instruction)
; Execution routine after releasing the software
STOP/IDLE mode
The case where bit operation instructions are used in the PSC register settings is the same.
(1) Command register (PRCMD)
The command register (PRCMD) is a register used when write-accessing the specific register to prevent
incorrect writing to the specific registers due to the erroneous program execution.
This register can be written in 8-bit units. It becomes undefined in a read cycle.
Occurrence of illegal store operations can be checked by the PRERR bit of the SYS register.
Address
FFFFF170H
7
REG7
PRCMD
6
REG6
5
REG5
4
REG4
3
REG3
2
REG2
1
REG1
0
REG0
After reset
Undefined
Bit Position
Bit Name
Function
Registration Code
Specific Register
Registration Code
CKC
Any 8-bit data
PSC
Any 8-bit data
7 to 0
REG7 to
REG0
...
...
Содержание V850E/MS1 UPD703100
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