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參數(shù)資料
型號(hào): 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(yè)數(shù): 23/94頁(yè)
文件大小: 554K
代理商: W741E260
W741E260
Publication Release Date: March 1998
- 23 -
Revision A2
w
1
2
3
IEF
4
w
w
5
6
0
w
w
7
Note: W means write only.
IEF.0 = 1 Interrupt 0 is accepted by overflow from the Divider 0.
IEF.1 = 1 Interrupt 1 is accepted by underflow from the Timer 0.
IEF.2 = 1 Interrupt 2 is accepted by a signal change at port RC.
IEF.3 is reserved.
IEF.4 = 1 Interrupt 4 is accepted by overflow from the Divider 1 for W741C260 body.
Interrupt 4 is accepted by a falling edge signal at the
INT
pin for W741C250 body.
IEF.5 & IEF.6 are reserved.
IEF.7 = 1 Interrupt 7 is accepted by underflow from Timer 1.
Stop Mode Operation
In stop mode, all operations of the
μ
C cease (excluding the operation of the sub-oscillator and divider 1
when the dual-clock operation mode is selected). The
μ
C enters stop mode when the STOP instruction
is executed and exits stop mode when an external trigger is activated (by a falling signal on the RC
port for W741C260 body or by a falling signal on the RC port or a low level on the
INT
pin for
W741C250 body). When the designated signal is accepted, the
μ
C awakens and executes the next
instruction (if the corresponding bits of IEF and PEF have been set, It will enter the interrupt service
routine after stop mode released). To prevent erroneous execution, the NOP instruction should follow
the STOP command. But In the dual-clock slow operation mode, the STOP instruction will disable the
main-oscillator oscillating; the
μ
C system is still operated by the sub-oscillator.
Stop Mode Wake-up Enable Flag for RC Port (SEF)
The stop mode wake-up flag for port RC is organized as an 4-bit binary register (SEF.0 to SEF.3).
Before port RC may be used to make the device exit the stop mode, the content of the SEF must be
set first. The SEF is controlled by the MOV SEF, #I instruction. The bit descriptions are as follows:
Note: W means write only.
SEF
w
w
w
0
1
2
w
3
SEF.0 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.0
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
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