PPM-C407/Configuration
v1.0
www.winsystems.com
Page 24
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:
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
Pin
Name
Pin
Name
1
DCD1
2
DSR1
3
RXD1
4
RTS1
5
TXD1
6
CTS1
7
DTR1
8
RI1
9
GND
10
GND
11
DCD2
12
DSR2
13
RXD2
14
RTS2
15
TXD2
16
CTS2
17
DTR2
18
RI2
19
GND
20
GND
21
DCD3
22
DSR3
23
RXD3
24
RTS3
25
TXD3
26
CTS3
27
DTR3
28
RI3
29
GND
30
GND
31
DCD4
32
DSR4
33
RXD4
34
RTS4
35
TXD4
36
CTS4
37
DTR4
38
RI4
39
GND
40
GND
39
40
1
2
PRELIMINARY
