Owner's manual

EMB-H81A
2-20
CAUTION: Do not forget to connect the fan cables to the fan connectors.
Insufcient air ow inside the system may damage the motherboard
components. These are not jumpers! Do not place jumper caps on the fan
connectors!
NOTE: The CPU_FAN connector supports a CPU fan of maximum 2A (24 W)
fan power.
2. CPU and chassis fan connectors (4-pin CPU_FAN1, 4-pin CHA_FAN1)
Connect the fan cables to the fan connectors on the motherboard, ensuring
that the black wire of each cable matches the ground pin of the connector.
EMB-H81A Fan connectors
CHA_FAN1
GND
VCC
SENSE
PWM
CPU_FAN1
PWM
SENSE
VCC
GND
EMB-H81A DIO connector
PIN 1
DIO
GPIO50(DIO_P#1)
GPIO53 (DIO_P#3)
GPIO55 (DIO_P#5)
GPIO57(DIO_P#7)
+5V
GPIO51 (DIO_P#2)
GPIO54(DIO_P#4)
GPIO56(DIO_P#6)
GPIO58 (DIO_P#8)
GND
3. Digital I/O connector (10-pin DIO)
This connector includes 8 I/O lines. All of the Digital I/O lines are
programmable and each I/O pin can be individually programmed to support
various devices.
NOTE: To congure the I/O pins in BIOS, click Advanced tab > SIO GPIO >
GPIO 50~57. See section 3.4.6 SIO GPIO for details.