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Super A2SAN-LN4-E/-C User's Manual
General Purpose I/O Header
The JGP1 (General Purpose Input/Output) header is a general purpose I/O expander on a
pin header via the SMBus. Each pin can be configured to be an input pin or output pin. The
GPIO is controlled by the SIO NCT5523D (pins GP20 - GP27). Refer to the table below for
pin definitions.
GPIO Header
Pin Definitions
Pin#
Definition
Pin#
Definition
1
P3V3SB
2
GND
3
GP_P3V3_GP0
4
GP_P3V3_GP4
5
GP_P3V3_GP1
6
GP_P3V3_GP5
7
GP_P3V3_GP2
8
GP_P3V3_GP6
9
GP_P3V3_GP3
10
GP_P3V3_GP7
JLAN2
LAN2
JLAN3
LAN3
JLAN4
LAN4
JLAN1
LAN1
I-SATA0
JPH1
JD1
JHDMI1
J2
JSIM1
JSIM2
JUSB1
FAN1
JPW1
MH2
MH4
JSIM_OPT1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
LED9
LED1
JPME2
JF1
JGP1
COM1
MH3
DESIGNED IN USA REV
: 1.01
A2SAN-LN4
CPU1
MH1
USB0/1
USB2/3 (3.0)
BT1
1
1. General Purpose
Header
2. Battery Connector
2
Bettery Connector
BT1 is a two-pin connector for an external CMOS battery. This connector is also used to clear
the CMOS. To clear the CMOS, remove the battery, short pins 1-2 for more than 10 seconds
and then install the battery.