16
3.3 Parallel Port
This port is usually connected to a printer. The ROCKY-538TXV includes an on-
board parallel port accessed through a 26-pin flat-cable connector CN3.
CN3 : Parallel Port Connector
PIN DESCRIPTION PIN DESCRIPTION
1 STROBE# 2 DATA 0
3 DATA 1 4 DATA 2
5 DATA 3 6 DATA 4
7 DATA 5 8 DATA 6
9 DATA 7 10 ACKNOWLEDGE
11 BUSY 12 PAPER EMPTY
13 PRINTER SELECT 14 AUTO FORM FEED #
15 ERROR# 16 INITIALIZE
17 PRINTER SELECT LN# 18 GROUND
19 GROUND 20 GROUND
21 GROUND 22 GROUND
23 GROUND 24 GROUND
25 GROUND
3.4 Serial Ports
The ROCKY-538TXV offers two high speed NS16C550 compatible UARTs with
Read/Receive 16 byte FIFO serial ports.
CN12 : Serial Port DB-9 Connector( COM1 )
PIN DESCRIPTION
1 DATA CARRIER DETECT (DCD)
2 RECEIVE DATA (RXD)
3 TRANSMIT DATA (TXD)
4 DATA TERMINAL READY (DTR)
5 GROUND (GND)
6 DATA SET READY (DSR)
7 REQUEST TO SEND (RTS)
8 CLEAR TO SEND (CTS)
9 RING INDICATOR (RI)
CN13 : Serial Port 10-pin Header( COM2)
PIN DESCRIPTION PIN DESCRIPTION
1
DCD
6
DSR
2 RXD 7 RTS
3 TXD 8 CTX
4 DTR 9 RI
5 GND 10 NC
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