IMB520 / 521 LGA1151 ATX Motherboard
12
Board and Pin Assignments
2.5.1
Keyboard and PS/2 Mouse Connector (CN1)
The board supports a keyboard and mouse interface. Connector CN1 is a DIN connector
for PS/2 keyboard connection via a Y-Cable.
Pin
Signal
CN1
1
Keyboard Data
2
Mouse Data
3
GND
4
VCC
5
Keyboard Clock
6
Mouse Clock
2.5.2
Front Panel Header (CN24)
This is a front panel header (7x2-pin p=2.54mm).
Note
[*]
: The buzzer on the motherboard will be active when pin 2 and pin 4 are
connected; the external speaker on the chassis will be active when pin 2
and pin 4 are open.
Pin
Signal
1
Power LED+
2
SPK-
[*]
3
GND
4
BUZZER
5
Power LED-
6
N/C
7
N/C
8
SPK+
[*]
9
PWR-
10
PWR+
11
RESET-
12
RESET+
13
HD LED-
14
HD LED+
