User's Manual

Turbo PMAC2 VME Hardware Reference
28 Base Board Connector Pinouts
P1 JVME (96-Pin Header)
Continued
Front View
Pin # Row A Row B Row C
28 A03 IRQ3/ A10
29 A02 IRQ2/ A09
30 A01 IRQ1/ A08
31 -12V +5V STDBY +12V
32 +5V +5V +5V
This is the standard VME connector. It is sufficient for 16-bit or 24-bit addressing, and for 8-bit or 16-bit data. For
32-bit addressing the B-row of P2 must be used as well. PMAC does not support 32-bit data transfers over the bus,
even with the B-row of P2.
If P1 is connected to the VME backplane, PMAC is connected to the +5V supply and GND automatically. In this
case, no other +5V supply should be connected.
P2 (JMACHA) Alternate Machine Connector
The P2 connector provides an alternate path to J9 and J10 for the machine interface connections for
Channels 1-4. Only the positive signals of complementary pairs are brought out on this connector. For
the inputs, the complementary lines are tied to 2.5V on PMAC2. Refer to the J9 and J10 pin descriptions
for more detailed information on each pin.
P2/JMACHA (96-Pin
Header) Continued
Front View
Pin# Row A Row B
(Format A)
Row B
(Format B)
Row C
01 +5V +5V CHU1 +5V
02 GND GND CHU3 GND
03 CHA1 (Reserved) CHV1 CHA3
04 CHB1 VA24 CHV3 CHB3
05 CHC1 VA25 CHW1 CHC3
06 PLIM1 VA26 CHW3 PLIM3
07 MLIM1 VA27 CHT1 MLIM3
08 HOME1 VA28 CHT3 HOME3
09 AENA1 VA29 USER1 AENA3
10 FAULT1 VA30 USER3 FAULT3
11 PWMATOP1/ DAC_CLK1 VA31 ADC_DAA1 PWMATOP3/ DAC_CLK3
12 PWMABOT1/ DAC1A GND ADC_DAA3 PWMABOT3/ DAC3A
13 PWMBTOP1/ DAC_STB1 +5V ADC_DAB1 PWMBTOP3/ DAC_STB3
14 PWMBBOT1/ DAC1B VD16* ADC_DAB3 PWMBBOT3/ DAC3B
15 PWMCTOP1/ DIR1 VD17* ADC_CLK1234 PWMCTOP3/ DIR3
16 PWMCBOT1/ PULSE1 VD18* ADC_STB1234 PWMCBOT3/ PULSE3
17 CHA2 VD19* SCLK1234 CHA4
18 CHB2 VD20* WD0/ CHB4
19 CHC2 VD21* CHU2 CHC4
20 PLIM2 VD22* CHU4 PLIM4
21 MLIM2 VD23* CHV2 MLIM4
22 HOME2 GND CHV4 HOME4
23 AENA2 VD24* CHW2 AENA4
24 FAULT2 VD25* CHW4 FAULT4
25 PWMATOP2/ DAC_CLK2 VD26* CHT2 PWMATOP4/ DAC_CLK4