Intel MB820 User Manual
Page 18
INSTALLATIONS
14
MB820 User’s Manual
CN1: PS/2 Keyboard and PS/2 Mouse Connectors
PS/2 Mouse
PS/2 Keyboard
Signal Name
Keyboard
Mouse
Signal Name
Keyboard data
1
1
Mouse data
N.C.
2
2
N.C.
GND
3
3
GND
5V
4
4
5V
Keyboard clock
5
5
Mouse clock
N.C.
6
6
N.C.
CN2: 4-port USB Connector
CN2 is a USB connector consisting of four ports stacked vertically.
Pin Signal Name
1
Ground
2
USB+
3
USB-
CN2
4
Vcc
CN3, J3: Serial Ports
CN3 (COM1) is a DB-9 connector, while J3 is a COM2 pin-header
connector. COM2 is optionally available as a DB-9 connector (CN5).
COM1 COM2
Signal Name
Pin #
Pin #
Signal Name
DCD, Data carrier detect
1
6
DSR, Data set ready
RXD, Receive data
2
7
RTS, Request to send
TXD, Transmit data
3
8
CTS, Clear to send
DTR, Data terminal ready
4
9
RI, Ring indicator
GND, ground
5
10
Not Used