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參數(shù)資料
型號(hào): W741C260
廠商: WINBOND ELECTRONICS CORP
元件分類(lèi): 微控制器/微處理器
英文描述: 4-BIT Microcontroller(多次可編程4位的微控制器)
中文描述: 4-BIT, MROM, 4.19 MHz, MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁(yè)數(shù): 17/92頁(yè)
文件大小: 488K
代理商: W741C260
W741C260
Publication Release Date: March 1998
- 17 -
Revision A3
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 or 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
Timer1, Signal Change on
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.n Flag
Execute
Interrupt Service Routine
Reset EVF.n Flag
Execute
Interrupt Service Routine
Port RC
Interrupt
Enable
Interrupt
Enable
Yes
Yes
No
No
Disable interrupt
Disable interrupt
Note : The bit of EVF corresponding to the interrupt request signal will be reset.
(Note)
(Note)
Figure 8. Hold Mode and Interrupt Operation Flow Chart
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