User's Manual

PMAC2 VME Hardware Reference Manual
Connectors 21
P2/JMACHA (96-Pin Header)
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 (not used) ADC_DAB3 PWMBBOT3/ DAC3B
15 PWMCTOP1/ DIR1 VD17 (not used) ADC_CLK1234 PWMCTOP3/ DIR3
16 PWMCBOT1/ PULSE1 VD18 (not used) ADC_STB1234 PWMCBOT3/ PULSE3
17 CHA2 VD19 (not used) SCLK1234 CHA4
18 CHB2 VD20 (not used) WD0/ CHB4
19 CHC2 VD21 (not used) CHU2 CHC4
20 PLIM2 VD22 (not used) CHU4 PLIM4
21 MLIM2 VD23 (not used) CHV2 MLIM4
22 HOME2 GND CHV4 HOME4
23 AENA2 VD24 (not used) CHW2 AENA4
24 FAULT2 VD25 (not used) CHW4 FAULT4
25 PWMATOP2/
DAC_CLK2
VD26 (not used) CHT2 PWMATOP4/
DAC_CLK4
26 PWMABOT2/ DAC2A VD27 (not used) CHT4 PWMABOT4/ DAC4A
27 PWMBTOP2/
DAC_STB2
VD28 (not used) USER2 PWMBTOP4/
DAC_STB4
28 PWMBBOT2/ DAC2B VD29 (not used) USER4 PWMBBOT4/ DAC4B
29 PWMCTOP2/ DIR2 VD30 (not used) ADC_DAA2 PWMCTOP4/ DIR4
30 PWMCBOT2/ PULSE2 VD31 (not used) ADC_DAA4 PWMCBOT4/ PULSE4
31 GND GND ADC_DAB2 GND
32 +5V +5V ADC_DAB4 +5V
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.
Note: Format A for the B-row will be used if E7A-H, E8A-H, E9A-H, and E10A-H connect pins 2 and 3. This
format must be used for a 32-bit VME system. Format B for the B-row will be used if these jumpers connect pins
1 and 2. This format is not compatible with 32-bit VME systems.