Registers - NEC V850ES/KE1+ User Manual

19.2 Registers

(1) Power save control register (PSC)
This is an 8-bit register that controls the standby function. The STP bit of this register is used to specify the
standby mode. The PSC register is a special register that can be written to only in a special sequence (refer
to 3.4.7 Special registers).
This register can be read or written in 8-bit or 1-bit units.
Reset sets this register to 00H.
After reset: 00H
PSC NMI2M
NMI2M
NMI0M
INTM
Note In this case, standby mode means the IDLE/STOP mode; it does not include the HALT mode.
Cautions 1. If the NMI2M, NMI0M, and INTM bits, and the STP bit are set to 1 at the same time, the
setting of NMI2M, NMI0M, and INTM bits becomes invalid.
interrupt request signal being held pending when the IDLE/STOP mode is set, set the bit
corresponding to the interrupt request signal (NMI2M, NMI0M, or INTM) to 1, and then set
the STP bit to 1.
2. When the IDLE/STOP mode is set, set the PSMR.PSM bit and then set the STP bit to 1.
CHAPTER 19 STANDBY FUNCTION
R/W Address: FFFFF1FEH
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0 NMI0M
Control of releasing standby mode
0
Releasing standby mode
1
Releasing standby mode
Control of releasing standby mode
0 Releasing standby mode
1 Releasing standby mode
Control of releasing standby mode
0 Releasing standby mode
1 Releasing standby mode
STP
0 Normal mode
Note
1 Standby mode
User's Manual U16896EJ2V0UD
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INTM 0 0
Note
by INTWDT2 signal
Note
by INTWDT2 signal enabled
Note
by INTWDT2 signal disabled
Note
by NMI pin input
Note
by NMI pin input enabled
Note
by NMI pin input disabled
Note
by maskable interrupt request signals
Note
by maskable interrupt request signals enabled
Note
by maskable interrupt request signals disabled
Note
Standby mode setting
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STP 0
If there is an unmasked
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