Reference Manual

PMAC-PC Hardware Reference

PMAC-PCI Base Board Connector Pinouts 41

BASE BOARD CONNECTOR PINOUTS

J1: Display Port Connector

J1 JDISP (14-Pin Connector)

Front View

Pin # Symbol Function Description Notes

1 Vdd Output +5V Power Power supply out

2 Vss Common PMAC Common

3 Rs Output Read Strobe TTL signal out

4 Vee Output Contrast Adjust VEE 0 TO +5 VDC *

5 E Output Display Enable High is enable

6 R/W Output Read or Write TTL signal out

7 DB1 Output Display Data 1

8 DB0 Output Display Data 0

9 DB3 Output Display Data 3

10 DB2 Output Display Data 2

11 DB5 Output Display Data 5

12 DB4 Output Display Data 4

13 DB7 Output Display Data 7

14 DB6 Output Display Data 6

* Controlled by potentiometer R1

The JDISP connector is used to drive the 2-line x 24-character (Acc-12), 2 x 40 (Acc-12A) LCD, or the 2

x 40 vacuum fluorescent (Acc 12C) display unit. The DISPLAY command may be used to send messages

and values to the display.