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参数资料
| 型号： | EM73MA89B |
| 英文描述： | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-EPSOIC T&R |
| 中文描述： | 4，液晶产品位微控制器 |
| 文件页数： | 32/64页 |
| 文件大小： | 331K |
| 代理商： | EM73MA89B |
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38
* This specification are subject to be changed without notice.
10.15.2002 (V1.3)
EM73MA89B
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Preliminary
RESETTING FUNCTION
When CPU in normal working condition and RESET pin is held in low level for three instruction cycles at least,
then CPU begins to initialize the whole internal states, when RESET pin changes to high level, CPU begins
to work in normal condition.
The CPU internal state during reset condition is as following table :
Hardware condition in RESET state
Initial value
Program counter
0000h
Status flag
01h
Interrupt enable flip-flop ( EI )
00h
MASK0 ,1, 2, 3
00h
Interrupt latch ( IL )
00h
P3, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 21, 22,
00h
25, 27, 28, 29
P0, 1, 2, 4, 5, 6, 7, 8, 17, 23, 24
0Fh
CLK, LXIN
Start oscillation
The RESET pin is a hysteresis input pin and it has a pull-up resistor available by mask option.
The simplest RESET circuit is connect RESET pin with a capacitor to V
SS and a diode to VDD.
RESET
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