User`s guide

Ports
M1 System Management Board User’s Guide 17
Ports
RS232
This kit contains one RS-232 port with a MAX3221 transceiver that can be used for communications between the
M1AFS1500-FG484 device and a common serial port found on a PC or other RS-232 compatible device.
Note: The RS-232 interface does not support hardware RTS/CTS hand shaking. The default configuration has the RTS
and CTS shorted together to create a loopback connection.
RS485
This kit contains one RS485 2-wire port with a MAX3362 that can be used for communications between the
M1AFS1500-FG484 device and a RS485 port. Necessary terminating resistors are provided on the board.
Ethernet 10/100 PHY
One MII ethernet port is provided on the part. It uses a DP83846A transceiver chip and an RJ-45 connector. This
directly interfaces with the M1AFS1500-FG484 device. Four LEDs are provided along with the port. See Table 2-5.
SMBUS Port
Three ports (J4, J5, and J71) are provided for SMBus communications. All signals directly interface with the
M1AFS1500-FG484 device. The connections are shown in Table 2-6 and Table 2-7 on page 17. 0.100 in x 0.100 in
center-to-center connectors are used as the interface. 1.8-kΩ pull-ups are used for all the signals.
Table 2-5 · LED Description
LED Reference Designator Silkscreen
D2 FD
D3 COL
D4 RX
D5 SPEED
Table 2-6 · Jumper Settings
Jumper Connections
JP21 1-2
JP22 1-2
JP23 1-2
JP24 1-2
Table 2-7 · Connector Settings
Connector Settings
Pin 1 3.3 V
Pin 2 SCL
Pin 3 SDA
Pin 4 1-GND