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參數資料
型號: W741E260
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT FLASH MICROCONTROLLER
中文描述: 4-BIT, FLASH, 4.19 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數: 24/94頁
文件大小: 554K
代理商: W741E260
W741E260
- 24 -
Hold Mode Operation
In hold mode, all operations of the
μ
C cease, except for the operation of the oscillator, Timer, Divider
and LCD driver. 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 11. Hold Mode and Interrupt Operation Flow Chart
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