Hardware Configuration
ROBO-8777VG2A User’s Manual
2-7
J45: External Keyboard Connector
PIN No.
Signal Description
PIN No.
Signal Description
1
Mouse Data
2
Keyboard Data
3 N/C
4 N/C
5 Ground
6 Ground
7
PS2 Power
8
PS2 Power
9
Mouse Clock
10
Keyboard Clock
J46: General Purpose I/O Connector
PIN No.
Signal Description
PIN No.
Signal Description
1 GPIO0
2 GPIO4
3 GPIO1
4 GPIO5
5 GPIO2
6 GPIO6
7 GPIO3
8 GPIO7
9 Ground
10 +5V
Note:
All General Purpose I/O ports can only apply to standard TTL ± 5% signal level
(0V/5V), and each Fan.
J47: Parallel Port Connector
PIN No.
Signal Description
PIN No.
Signal Description
1
Strobe#
14
Auto Form Feed#
2 Data
0
15 Error#
3 Data
1
16 Initialization#
4
Data 2
17
Printer Select IN#
5 Data
3
18 Ground
6 Data
4
19 Ground
7 Data
5
20 Ground
8 Data
6
21 Ground
9 Data
7
22 Ground
10 Acknowledge#
23 Ground
11 Busy
24 Ground
12 Paper
Empty
25 Ground
13 Printer
Select
26 N/C
