J9 Serial Ports - WinSystems PPM-C407 Product Manual

v1.0

7.8.8 J9 Serial Ports

The PPM-C407 provides four serial ports through the Lattice MachX02 FPGA interfaced
to the processor with the Low Pin Count (LPC) interface. Two serial ports support
RS232, RS422 and RS485 protocols (using the Exar SP339E multi-protocol
transceiver). The other two ports support RS232 (only) using the Maxim MAX3241E
transceiver.
Layout and Pin Reference:
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39
Four independent, asynchronous serial channels are on-board. All serial ports are
configured as Data Terminal Equipment (DTE). Both the send and receive registers of
each port have a 16-byte FIFO. All serial ports have 16C550-compatible UARTs. The
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Pin
1 DCD1
3 RXD1
5 TXD1
7 DTR1
9 GND
11 DCD2
13 RXD2
2
15 TXD2
17 DTR2
19 GND
21 DCD3
23 RXD3
25 TXD3
40
27 DTR3
29 GND
31 DCD4
33 RXD4
35 TXD4
37 DTR4
39 GND
PPM-C407/Configuration
Name Pin Name
2 DSR1
4 RTS1
6 CTS1
8 RI1
10 GND
12 DSR2
14 RTS2
16 CTS2
18 RI2
20 GND
22 DSR3
24 RTS3
26 CTS3
28 RI3
30 GND
32 DSR4
34 RTS4
36 CTS4
38 RI4
40 GND
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