18
NC
19
GND
GND
20
GND
GND
3.8 RS485 Serial Ports(J5)
The SBC-SAM9G20 Single Board Computer provides one half duplex RS-485 port.
The RS-485 port is connected to UART1 with RTS signal for RS-485 driver direction
control. The RS-485 signal is provided via a 1x4 spacing header J5 (For Pin3 and
Pin4).
It use the chips: ADM2483BRWZ
J5(
RS-485 Port )
Pin Signal Name
3
A
4
B
3.9 CAN 2.0 BUS(J5)
CAN2.0 is extended through MCP2515 and led out through connector J5. It is with
isolated resource and digital signal isolator. Pin definition is as below:
J5(
CAN bus )
Pin Signal Name
1
CAN_H
2
CAN_L
3.10 NET(J22)
The SBC-SAM9G20 Single Board Computer is shipped with support for a complete
Ethernet interface. The AT91SAM9G20 contains a MAC subsystem that is compliant
with the ISO/TEC 802.3 topology for a single shared medium with several stations.
The Media Access Controller (MAC) within the AT91SAM9G20 supports 1/10/100
Mbps transfer rates and interfaces to industry standard physical layer devices. The
SBC-SAM9G20 is shipped with the DM9161 100Base-X / 10Base-T Transceiver
device which, along with a RJ45 connector, provides the physical layer interface.
SBC-SAM9G20 User manual
www.armdevs.com
