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參數(shù)資料
| 型號(hào)： | W741E20X |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | 4-BIT FLASH MICROCONTROLLER |
| 中文描述： | 4位閃存微控制器 |
| 文件頁(yè)數(shù)： | 25/84頁(yè) |
| 文件大小： | 531K |
| 代理商： | W741E20X |
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Preliminary W741E20X
Publication Release Date: March 1998
- 25 -
Revision A1
SEF 1 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.1
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
Hold Mode Operation
In hold mode, all operations of the
μ
C cease, except for the operation of the oscillator and timer. 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, the divider, the
INT
pin, 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, /INT, Timer 0,
Timer 1, Serial I/O and
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 14. Hold Mode and Interrupt Operation Flow Chart
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