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EM73880 Datasheet(PDF) 27 Page - ELAN Microelectronics Corp

Part # EM73880
Description  4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
PDF  40 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM73880 Datasheet(HTML) 27 Page - ELAN Microelectronics Corp

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* This specification are subject to be changed without notice.
EM73880
EM73880
EM73880
EM73880
EM73880
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
11.30.2001
Preliminary
Preliminary
Preliminary
Preliminary
Preliminary
RESETTING FUNCTION
RESETTING FUNCTION
RESETTING FUNCTION
RESETTING FUNCTION
RESETTING FUNCTION
When CPU in normal working condition and RESET pin holds in low level for three instruction cycles at least,
then CPU begins to initialize the whole internal states, and 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
P4, P5, P10, 11,14, 16, 19, 25, 27, 28, 29, 31 00h
P4, 8, 17, 23, 24
0Fh
Both oscillator
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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