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Battery 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.
Universal Serial Bus (USB) Ports
The motherboard has four USB 3.1 Gen 2 ports (USB0/1, USB2/3) on the I/O back panel.
There are two USB 2.0 headers (USB4/5, USB6/7) that provide four USB connections. These
onboard headers can be used to provide front side USB access with a cable (not included).
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 via the PCA9554APW 8-bit GPIO expansion from PCH SMBus. The base
address is 0xF040. The expander slave address is 0x4C for WRITE and READ. See the table
below for pin definitions.
USB 2.0 Header
Pin Definitions (USB4/5)
Pin#
Definition
Pin#
1
+5V
2
3
USB_PN4
4
5
USB_PP4
6
7
Ground
8
9
Key
10
USB 2.0 Header
Pin Definitions (USB6/7)
Pin#
Definition
Pin#
1
+5V
2
3
USB_PN6
4
5
USB_PP6
6
7
Ground
8
9
Key
10
GPIO Header
Pin Definitions
Pin#
Definition
Pin#
1
P3V3SB
2
3
GP_P3V3_GP0
4
5
GP_P3V3_GP1
6
7
GP_P3V3_GP2
8
9
GP_P3V3_GP3
10
29
Chapter 3: Motherboard Connections
Definition
+5V
USB_PN5
USB_PP5
Ground
Ground
Definition
+5V
USB_PN7
USB_PP7
Ground
Ground
Definition
GND
GP_P3V3_GP4
GP_P3V3_GP5
GP_P3V3_GP6
GP_P3V3_GP7
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