Page 8
Circuit Description
NMV 1700V
Port
Pin No. Signal Name
Initial Setting
Function
Remark
~
NC
~
~
P1.0
HDATA0
~
gm5020 4bit interface data
P1.1
!
HDATA1
~
gm5020 4bit interface data
P1.2
"
HDATA2~
gm502
0 4bit interface data
P1.3
#
HDATA3
~
gm5020 4bit interface data
P1.4
$
HCLK
~
gm5020 4bit interface Clock
P1.5
%
HFS
~
gm5020 data enable
P1.6
&
Bank
~
~
P1.9
'
PWM
~
Pulse width modulation
~
RST
L
Reset CPU
Active H
P3.0
RXD
H
Receive data
~
NC
~
~
P3.1
!
TXD
H
Transmit data
P3.2
"
IRQ
~
gm5020 interrupt signal
P3.3
#
PWR_SW
~
ON/OFF monitor power
P3.4
$
SDA
H
IIC Bus Data
P3.5
%
SCL
~
IIC Bus Data
Active L
P3.6
&
P3.6
H
External Memory Write Enable
P3.7
'
DDC_GND
L
Detect Dsub cable plug-in
~
XTAL2~
Crystal signal out
~
XTAL
~
Crystal signal in
~
GND
~
~
~
!
NC
~
~
P2.0
"
A8
~
High-order address byte
P2.1
#
A9
~
High-order address byte
P2.2
$
A10
~
High-order address byte
P2.3
%
A11
~
High-order address byte
P2.4
&
A12~
High-order address byte
P2.5
'
A13
~
High-order address byte
P2.6
!
A14
~
High-order address byte
P2.7
!
A15
~
High-order address byte
~
!
PSEN#
H
Program store enable
~
!!
ALE
~
Address latch enable
~
!"
NC
~
~
~
!#
EA#
H
External Access Enable
P0.7
!$
D7(USB_ON)
H
USB HUB power Enable (option)
P0.6
!%
D6(MUTE)
H
Audio MUTE Enable
P0.5
!&
D5(LVCC)
L
Audio suspend Enable
P0.4
!'
D4(LEDGRN)
H
LED Green ON
P0.3
"
D3(LEDAMBER)
L
LED AMBER ON
P0.2
"
D2(BKLT_EN)
~
Inverter Back light Enable
P0.1
"
D1(LVDS ON)
H
LVDS IC Enable
P0.0
"!
D0(PANEL EN)
H
Panel power Enable
~
""
VCC
~
VCC
8.8 List of CPU Pin Assignments