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EM73P968 Datasheet(PDF) 38 Page - ELAN Microelectronics Corp

Part # EM73P968
Description  4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
PDF  53 Pages
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Manufacturer  EMC [ELAN Microelectronics Corp]
Direct Link  http://www.emc.com.tw
Logo EMC - ELAN Microelectronics Corp

EM73P968 Datasheet(HTML) 38 Page - ELAN Microelectronics Corp

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* This specification are subject to be changed without notice.
8.14.2001
EM73P968
4-BIT MICRO-CONTROLLER FOR LCD PRODUCT
Preliminar
y
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, 12, 13, 14, 16, 19, 20, 21, 22, 25,
00h
27, 28, 29
P0, 1, 2, 4, 5, 6, 7, 8, 11, 15, 17, 30, 31
0Fh
LXIN, XIN
Startoscillation
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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