參數(shù)資料
型號(hào)： GMS87C7216Q
廠商： Electronic Theatre Controls, Inc.
元件分類： 8位微控制器
英文描述： 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 8位單晶片微控制器
文件頁數(shù)： 80/121頁
文件大小： 1645K
代理商： GMS87C7216Q
GMS81C7208/7216
76
FEB. 2005 Ver 1.04
20. POWER DOWN OPERATION
The GMS81C7208/16 has two power-down modes. In power-
down mode, power consumption is reduced considerably that in
Battery operation Battery life can be extended a lot.
Sleep mode is entered by setting bit 0 of sleep mode regis-
ter, and STOP mode is entered by STOP instruction.
20.1 SLEEP Mode
In this mode, the internal oscillation circuits remain active.
Oscillation continues and peripherals are operate normally but
CPU stops. Movement of all Peripherals is shown in Table 20-1.
Sleep mode is entered by setting bit 0 of SMR (address 0DE
H
).
It is released by RESET or interrupt. To be release by interrupt,
interrupt should be enabled before Sleep mode.
Figure 20-1 SLEEP Mode Register
Figure 20-2 Sleep Mode Release Timing by External Interrupt
.
Figure 20-3 SLEEP Mode Release Timing by RESET Pin
Sleep Mode Register
SMR
ADDRESS : 0DE
RESET VALUE : -------0
0: Release Sleep Mode
1: Enter Sleep Mode
W
Oscillator
(X
IN
pin)
Normal Operation
Stand-by Mode
Normal Operation
Interrupt
Internal CPU Clock
Release
Set bit 0 of SMR
~
~
Oscillator
(X
IN
pin)
0
BIT Counter
1
FE
FF
0
1
2
~
t
= 62.5ms
at 4.19MHz by hardware
~
~
RESET
Internal CPU Clock
Clear & Start
~
Normal Operation
Sleep Mode
Normal Operation
Release
Set bit 0 of SMR
~
~
~
2
t
ST
=
x 256
f
MAIN
÷
1024
1
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