KTD-00781-A
KTG41 family
Page 24 of 78
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3.3
Keyboard and Mouse connectors
Attachment of a keyboard or PS/2 mouse adapter can be done through the stacked PS/2 mouse and
keyboard connector (MSE & KBD).
Both interfaces utilize open-drain signalling with on-board pull-up.
The PS/2 mouse and keyboard is supplied from SB5V when in standby mode in order to enable keyboard or
mouse activity to bring the system out from power saving states. The supply is provided through a 1.1A
resettable fuse.
3.3.1 MINI-DIN Keyboard and Mouse Connector (KBD)
Note
Pull
U/D
Ioh/Iol
Type
Signal
PIN
Signal
Type
Ioh/Iol
Pull
U/D
Note
-
-
-
NC
6
5
MSCLK
IOC
TBD
2K7
-
-
PWR 5V/SB5V
4
3
GND
PWR
-
-
-
-
-
NC
2
1
MSDAT
IOC
TBD
2K7
-
-
-
NC
6
5
KBDCLK
IOC
TBD
2K7
-
-
PWR 5V/SB5V
4
3
GND
PWR
-
-
-
-
-
NC
2
1
KBDDAT
IOC
TBD
2K7
Signal Description – Keyboard & and mouse Connector (MSE & KBD), see below.
3.3.2 Keyboard and Mouse pinrow Connector (KBDMSE)
PIN
Signal
Type
Ioh/Iol
Pull
U/D
Note
1
KBDCLK
IOC
TBD
2K7
2
KBDDAT
IOC
TBD
2K7
3
MSCLK
IOC
TBD
2K7
4
MSDAT
IOC
TBD
2K7
5
5V/SB5V
PWR
-
-
6
GND
PWR
-
-
Signal Description – Keyboard & and mouse Connector (KBDMSE).
Signal
Description
MSCLK
Bi-directional clock signal used to strobe data/commands from/to the PS/2 mouse.
MSDAT
Bi-directional serial data line used to transfer data from or commands to the PS/2 mouse.
KDBCLK
Bi-directional clock signal used to strobe data/commands from/to the PC-AT keyboard.
KBDDAT
Bi-directional serial data line used to transfer data from or commands to the PC-AT keyboard.
