SM39A16M1
8-Bit Micro-controller
16KB with ISP Flash
& 1K+256B RAM embedded
12. Power Management Unit
Power management unit serves two power management modes, IDLE and STOP, for the users to do power saving
function.
Mnemonic: PCON
Address: 87h
7
6
-
5
-
4
-
3
-
2
-
1
0
IDLE
Reset
00h
SMOD
STOP
STOP: Stop mode control bit. Setting this bit turning on the Stop Mode.
Stop bit is always read as 0
IDLE: Idle mode control bit. Setting this bit turning on the Idle Mode.
Idle bit is always read as 0
12.1 Idle mode
Setting the IDLE bit of PCON register invokes the IDLE mode. The IDLE mode leaves internal clocks and peripherals
running. Power consumption drops because the CPU is not active. The CPU can exit the IDLE state with any interrupts
or a reset.
12.2 Stop mode
Setting the STOP bit of PCON register invokes the STOP mode. All internal clocking in this mode is turn off. The CPU
will exit this state from a no-clocked interrupt (external INT0/1 and LVI、Watchdog interrupt) or a reset (WDT and LVR)
condition. Internally generated interrupts (timer, serial port ...) have no effect on stop mode since they require clocking
activity.
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M069
Ver C SM39A16M1 7/31/2013
- 63 -
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
