List Of Cpu Pin Assignments - NEC MultiSync LCD1700NX A Service Manual

7.8 List of CPU Pin Assignments

Port Pin No.
~ 1
P1.0 2
P1.1 3
P1.2 4
P1.3 5
P1.4 6
P1.5 7
P1.6 8
P1.9 9
~ 10
P3.0 11
~ 12
P3.1 13
P3.2 14
P3.3 15
P3.4 16
P3.5 17
P3.6 18
P3.7 19
~ 20
~ 21
~ 22
~ 23
P2.0 24
P2.1 25
P2.2 26
P2.3 27
P2.4 28
P2.5 29
P2.6 30
P2.7 31
~ 32
~ 33
~ 34
~ 35
P0.7 36
P0.6 37
P0.5 38
P0.4 39
P0.3 40
P0.2 41
P0.1 42
P0.0 43
~ 44
Signal Name Initial Setting
NC
HDATA0
HDATA1
HDATA2
HDATA3
HCLK
HFS
Bank
PWM
RST
RXD
NC
TXD
IRQ
PWR_SW
SDA
SCL
P3.6
DDC_GND
XTAL2
XTAL
GND
NC
A8
A9
A10
A11
A12
A13
A14
A15
PSEN#
ALE
NC
EA#
D7(USB_ON)
D6(MUTE)
D5(LVCC)
D4(LEDGRN)
D3(LEDANBER)
D2(BKLT_EN)
D1(LVDS ON)
D0(PANEL EN)
VCC
~
~ gm5020 4bit interface data
~ gm5020 4bit interface data
~ gm5020 4bit interface data
~ gm5020 4bit interface data
~ gm5020 4bit interface clock
~ gm5020 data enable
~
~ Pulse width modulation
L Reset CPU
H Receive data
~
H Transmit data
~ gm5020 interrupt signal
~ ON/OFF monitor power
H IIC Bus data
~ IIC Bus data
H External Memrv Write Enable
L Detect Dsub cable plug-in
~ Crystal signal out
~ Crystal signal in
~
~
~ High-order address byte
~ High-order address byte
~ High-order address byte
~ High-order address byte
~ High-order address byte
~ High-order address byte
~ High-order address byte
~ High-order address byte
H Program store enable
~ Address latch enable
~
H External Access Enable
H USB HUB power Enable(option)
H Audio MUTE Enable
L Audio suspend Enable
H LED Green ON
L LED AMBER ON
~ Inverter back light Enable
H LVDS IC Enable
H Panel power Enable
~ VCC
7-7
Function
~
~
~
~
~
~
Remark
Active H
Active L