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

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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

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