User's Manual

PMAC2 VME Hardware Reference Manual
Connectors 13
J6/JDISP (14-Pin Header)
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 +5Vdc *
5 E Output Display Enable High is Enable
6 R/W Output Read Or Write TTL Signal Out
7 DB1 Output Display Data1
8 DB0 Output Display Data0
9 DB3 Output Display Data3
10 DB2 Output Display Data2
11 DB5 Output Display Data5
12 DB4 Output Display Data4
13 DB7 Output Display Data7
14 DB6 Output Display Data6
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.
J7/JHW (20-Pin Header)
1
2
19
20
Front View
Pin # Symbol Function Description Notes
1 GND Common Ref. Voltage
2 +5V Output Supply Voltage To power external circuitry
3 HWA1+ Input Hw Pos A Chan. Also pulse input
4 HWA1- Input Hw Neg A Chan. Also pulse input
5 HWB1+ Input Hw Pos B Chan. Also direction input
6 HWB1- Input Hw Neg B Chan. Also direction input
7 HWA2+ Input Hw Pos A Chan. Also pulse input
8 HWA2- Input Hw Neg A Chan. Also pulse input
9 HWB2+ Input Hw Pos B Chan. Also direction input
10 HWB2- Input Hw Neg B Chan. Also direction input
11 PUL1+ Output Pfm Pos Pulse Also PWM output
12 PUL1- Output Pfm Neg Pulse Also PWM output
13 DIR1+ Output Pfm Pos Dir. Out Also PWM output
14 DIR1- Output Pfm Neg Dir Out Also PWM output
15 PUL2+ Output Pfm Pos Pulse Also PWM output
16 PUL2- Output Pfm Neg Pulse Also PWM output
17 DIR2+ Output Pfm Pos Dir. Out Also PWM output
18 DIR2- Output Pfm Neg Dir Out Also PWM output
19 GND Common Ref. Voltage
20 +5V Output Supply Voltage To power external circuitry
Typically, this connector provides the interface for two quadrature encoders to be used as handwheel or time-base
master encoders.