GMS81C7216 Datasheet, PDF (43/121 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

GMS81C7208/7216
11.1 Operation Mode
In the main-clock operation mode, only the high-frequency clock
oscillator is used.
During reset, the system clock mode register is initialized at the
main-clock mode.
Shifting from the Normal Operation to the SLEEP
Mode
By setting bit 0 of SMR, the CPU clock stops and the SLEEP
mode is invoked. The CPU stops while other peripherals are op-
erate normally.
The way of release from this mode is RESET and all available in-
terrupts.
For more detail, See "20.1 SLEEP Mode" on page 76
Shifting from the Normal Operation to the STOP
Mode
By executing STOP instruction, the main-frequency clock oscil-
lation stops and the STOP mode is invoked. After the STOP op-
eration is released by reset, the operation mode is to main-clock
mode.
The methods of release are RESET, watch timer interrupt, Timer/
Event Counter1 (EC0, EC2 pin), and external interrupt.
For more details, see "20.2 STOP Mode" on page 77.
Note: In the STOP, the power consumed by the oscillator
and the internal hardware is reduced. However, the power
for the pin interface (depending on external circuitry and
program) is not directly associated with the low-power con-
sumption operation. This must be considered in system de-
sign as well as interface circuit design.
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