Hardware Configuration
ROBO-8712VLA User’s Manual
2-9
J24: Ethernet RJ-45 Connector
PIN No.
Signal Description
1
TD+
2
TD-
3
TDC
4
Termination to Ground
5
Termination to Ground
6
RDC
7
RD+
8
RD-
J25: General Purpose I/O Connector
PIN No.
Signal Description
1
General Purpose I/O Port 1 (GPIO1)
2
General Purpose I/O Port 2 (GPIO2)
3
General Purpose I/O Port 3 (GPIO3)
4
General Purpose I/O Port 4 (GPIO4)
5 Ground
6
Buffered Digital Output Port 1 (DO1)
7
Buffered Digital Output Port 2 (DO2)
8
Buffered Digital Output Port 3 (DO3)
9
Buffered Digital Output Port 4 (DO4)
10 +5V
Notes:
1) All General Purpose I/O ports can only adapt standard TTL ± 5% signal level
(0V/5V). Pin 1~4 can be either input or output, while pin 6-10 can only be digital
output.
2) The 4 extra DO ports are provided for the applications that need higher driving
capability. Through invert amplitude respected to GPIO port, each open-drain DO
port can stand maximum fan out for up to 100mA, rather than 12mA direct driven
by GPIO port.
J26: 12V CPU Supplementary Connector
PIN No.
Signal Description
1 Ground
2 Ground
3 +12V
4 +12V
