A-4 Technical Specifications
Note: The + 3.3 V pins are tied together and decoupled with high frequency bypass capacitors to ground. No current from these 3.3 V pins is used on the board. The PCI portion of the SYM53C876 chip is powered from the 3 V/5 V pins.TableA.1 PCI Connector J1 (Front)1
1. Shaded signals are not connected.
Signal Name Pin Signal Name Pin Signal Name Pin
−12 V 1 GND 22 +3.3 V 43
TCK 2 AD27 23 C_BE1/ 44
GND 3 AD25 24 AD14 45
TDO 4 +3.3 V 25 GND 46
+5 V 5 C_BE3/ 26 AD12 47
+5 V 6 AD23 27 AD10 48
INTB/ 7 GND 28 GND 49
INTD/ 8 AD21 29 KEYWAY 50
GND (PRSNT1/) 9 AD19 30 KEYWAY 51
RESERVED 10 +3.3 V 31 AD08 52
GND (PRSNT2/) 11 AD17 32 AD07 53
KEYWAY 12 C_BE2/ 33 + 3.3 V 54
KEYWAY 13 GND 34 AD05 55
RESERVED 14 IRDY/ 35 AD03 56
GND 15+3.3 V 36GND 57
CLK 16 DEVSEL/ 37 AD01 58
GND 17 GND 38 3 V/5 V 59
REQ/ 18 LOCK/ 39 ACK64/ 60
3 V/5 V 19 PERR/ 40 +5 V 61
AD31 20 +3.3 V 41 +5 V 62
AD29 21 SERR/ 42