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參數(shù)資料
| 型號(hào)： | W741E200 |
| 英文描述： | 4-Bit Microcontroller |
| 中文描述： | 4位微控制器 |
| 文件頁(yè)數(shù)： | 24/84頁(yè) |
| 文件大小： | 344K |
| 代理商： | W741E200 |
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Preliminary W741E20X
- 24 -
Interrupt Enable Flag (IEF)
The interrupt enable flag is organized as an 8-bit binary register (IEF.0 to IEF.7). These bits are used
to control the interrupt conditions. It is controlled by the MOV IEF, #I instruction. When one of these
interrupts is accepted, the corresponding to the bit of the event flag will be reset, but the other bits are
unaffected. In interrupt subroutine, these interrupts will be disable till the instruction MOV IEF, #I
or EN
INT
is executed again. To enable these interrupts, the instructions MOV IEF, #I or EN INT must be
executed again. Otherwise, these interrupts can be disable by executing DIS INT instruction. The bit
descriptions are as follows:
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.
w
w
w
1
2
3
IEF
4
w
w
5
6
0
w
w
7
IEF.4 = 1 Interrupt 4 is accepted by a falling edge signal at the INT pin.
IEF.5 = 1 Interrupt 5 is accepted by the serial port received completely.
IEF.6 = 1 Interrupt 6 is accepted by the serial port transmitted completely.
IEF.7 = 1 Interrupt 7 is accepted by underflow from Timer 1.
External INT
The external interrupt INT pin contains a pull-up resistor. When the HEF.4 or IEF.4 flag is set, the
falling edge of the INT pin will execute the hold mode release or interrupt subroutine. A low level on
the INT pin will release the stop mode.
Stop Mode Operation
In stop mode, all operations of the
μ
C cease (including the operation of the oscillator). The
μ
C enters
stop mode when the STOP instruction is executed and exits stop mode when an external trigger is
activated (by a low level on the INT pin or a falling signal on the RC port). When the designated signal
is accepted, the
μ
C awakens and warm-up, and then executes the next instruction.
Stop Mode Wake-up Enable Flag for Ports RC (SEF)
The stop mode wake-up flag for ports 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 0 = 1 Device will exit stop mode when falling edge signal is applied to pin RC.0
SEF
w
w
w
0
1
2
w
3
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| W741E204 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER |
| W741E205 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER |
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