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Processor Termination, Regulation, and Power
The termination circuitry required by the Intel Pentium III Xeon processor bus (AGTL+) signaling environment and the circuitry to set the AGTL+ reference voltage, are implemented directly on the processor cards. The baseboard provides 1.5 V AGTL+ termination power (VTT), and VRM
Table 55. Processor VRM Connectors (J2A2, J2B1, J2C1):
Pin | Signal | Type* |
A1 | P5VIN1 | POWER |
A2 | P5VIN2 | POWER |
A3 | P5VIN3 | POWER |
A4 | P12VIN1 | POWER |
A5 | P12VIN3 | POWER |
A6 | P1SHARE |
|
A7 | VID0 | OUT |
A8 | VID2 | OUT |
A9 | VID4 | OUT |
A10 | VCCP1 | POWER |
A11 | VSS1 | POWER |
A12 | VCCP2 | POWER |
A13 | VSS2 | POWER |
A14 | VCCP3 | POWER |
A15 | VSS3 | POWER |
A16 | VCCP4 | POWER |
A17 | VSS4 | POWER |
A18 | VCCP5 | POWER |
A19 | VSS5 | POWER |
A20 | VCCP6 | POWER |
B1 | P5VIN4 | POWER |
B2 | P5VIN5 | POWER |
B3 | P5VIN6 | POWER |
B4 | P12VIN2 | POWER |
B5 | RES |
|
B6 | OUTEN | OUT |
B7 | VID1 | OUT |
B8 | VID3 | OUT |
B9 | PWRGOOD |
|
continued
102 | SKA4 Baseboard Product Guide |