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參數資料
型號: W742C81A
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT MICROCONTROLLER
中文描述: 4-BIT, FLASH, MICROCONTROLLER, UUC100
封裝: DIE-100
文件頁數: 21/45頁
文件大小: 567K
代理商: W742C81A
Preliminary W742E81A/W742C81A
Publication Release Date: April 2000
Revision A1
- 21 -
SEF.2 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.2
SEF.3 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.3
6.15 Hold Mode Operation
In hold mode, all operations of the
μ
C cease, except for the operation of the oscillator, Timer, Divider,
LCD driver, DTMF generator and MFP generator. The
μ
C enters hold mode when the HOLD
instruction is executed. The hold mode can be released in one of five ways: by the action of timer 0,
timer 1, divider 0, divider 1, the RC port. Before the device enters the hold mode, the HEF, PEF, and
IEF flags must be set to define the hold mode release conditions. For more details, refer to the
instruction-set table and the following flow chart.
Divider 0, Divider 1, Timer
0, Timer 1, Signal Change
at RC Port
In
HOLD
Mode
IEF
Flag Set
PC <- (PC+1)
IEF
Flag Set
No
Yes
No
Yes
Yes
No
Yes
No
HOLD
HEF
Flag Set
Reset EVF Flag
Execute
Interrupt Service Routine
Reset EVF Flag
Execute
Interrupt Service Routine
Interrupt
Enable
Interrupt
Enable
Yes
Yes
No
No
Disable interrupt
Disable interrupt
(Note)
(Note)
Note: The bit of EVF corresponding to the interrupt signal will be reset.
Figure 6-9 Hold Mode and Interrupt Operation Flow Chart
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