CHAPTER 8 CLOCK GENERATION FUNCTION
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User’s Manual U15195EJ5V0UD
8.5.2 Control registers
(1) Power save mode register (PSMR)
This is an 8-bit register that controls the power save mode. It is effective only when the STB bit of the PSC
register is set to 1.
Writing to the PSMR is executed by store instructions (ST/SST instruction) and bit manipulation instructions
(SET1/CLR1/NOT1 instruction).
This register can be read or written in 8-bit or 1-bit units.
7 6 5 4 3 2 1
<0>
Address
After
reset
PSMR
0 0 0 0 0 0 0
PSM
FFFFF820H
00H
Bit position
Bit name
Function
0
PSM
Specifies IDLE mode or software STOP mode.
0: Switches the system to IDLE mode
1: Switches the system to software STOP mode
(2) Command register (PRCMD)
This is an 8-bit register that is used to set protection for write operations to registers that can significantly
affect the system so that the application system is not halted unexpectedly due to erroneous program
execution.
Writing to the first specific register (power save control register (PSC)) is only valid after first writing to the
PRCMD register. Because of this, the register value can be overwritten only by the specified sequence,
preventing an illegal write operation from being performed.
This register is write-only in 8-bit units. Undefined data is read out if read.
7 6 5 4 3 2 1 0
Address
After
reset
PRCMD
REG7 REG6 REG5 REG4 REG3 REG2 REG1 REG0
FFFFF1FCH
Undefined
Bit position
Bit name
Function
7 to 0
REG7 to
REG0
Registration code (arbitrary 8-bit data)
The specific register targeted is the power save control register (PSC).
Содержание PD703114
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