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5.6 J3, J6: Serial Ports
The onboard serial ports of the TI6VG4, J3 and J6, are two DB-9
external connectors. The following table shows the pin-out assignments
of the these connectors.
J3 (COM1 )
Signal Name
DCD, Data carrier detect
RXD, Receive data
TXD, Transmit data
DTR, Data terminal ready
GND, ground
5.7 J4: Parallel Port Connector
J4 is a DB-25 external connector as seen in the previous figure. The
following table describes the pin-out assignments of this connector.
Signal Name
Line printer strobe
PD0, parallel data 0
PD1, parallel data 1
PD2, parallel data 2
PD3, parallel data 3
PD4, parallel data 4
PD5, parallel data 5
PD6, parallel data 6
PD7, parallel data 7
ACK, acknowledge
Busy
Paper empty
Select
TI6VG4 User's Manual
Chapter 5 Installation
J6 (COM2)
Pin #
Pin #
Signal Name
1
6
DSR, Data set ready
2
7
RTS, Request to send
3
8
CTS, Clear to send
4
9
RI, Ring indicator
5
10
Not Used
J4 Parallel Port
Pin #
Pin #
Signal Name
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
N/A
AutoFeed
Error
Initialize
Select
Ground
Ground
Ground
Ground
Ground
Ground
Ground
Ground
N/A
23
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