18
3.3 Parallel Port
This port is usually connected to a printer. NOVA-8890 includes an on-board
parallel port, accessed through a 26-pin flat-cable connector.
•
LPT1: Parallel Port Connector
PIN DESCRIPTION PIN
DESCRIPTION
1
STROBE#
14
AUTO FORM FEED #
2 DATA
0
15 ERROR#
3 DATA
1
16 INITIALIZE
4
DATA 2
17
PRINTER SELECT LN#
5 DATA
3
18 GROUND
6 DATA
4
19 GROUND
7 DATA
5
20 GROUND
8 DATA
6
21 GROUND
9 DATA
7
22 GROUND
10 ACKNOWLEDGE
23 GROUND
11 BUSY
24 GROUND
12 PAPER
EMPTY
26 GROUND
13 PRINTER
SELECT
26 GROUND
3.4 Serial Ports
NOVA-8890 offers four high speed NS16C550 compatible UART.
•
COM1, COM3, COM4: 10-pin header
•
COM2: 14-pin header
CONNECTOR PORT ADDRESS
INTERRUPT
COM1 COM1 3F8 IRQ4
COM2 COM2 2F8 IRQ3
COM3 COM3 3E8 IRQ11
COM4 COM4 2E8 IRQ10
•
COM1, COM3, COM4 10-pin Connector
PIN
DESCRIPTION
PIN
DESCRIPTION
1
DATA CARRIER DETECT (DCD)
6
DATA SET READY (DSR)
2
RECEIVE DATA (RXD)
7
REQUEST TO SEND (RTS)
3
TRANSMIT DATA (TXD)
8
CLEAR TO SEND (CTS)
4
DATA TERMINAL READY (DTR)
9
RING INDICATOR (RI)
5 GROUND
10 NC
Содержание NOVA-8890
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