Processor Termination, Regulation, And Power; Processor Vrm Connectors (J2A2, J2B1, J2C1): Add-In Vrm Connector Pin Listing - Intel SKA4 Product Manual

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
8.3-compliant DC-to-DC converters to provide processor power (VCCP) at each connector. The
baseboard provides three embedded and three VRM sockets to power the processors, which derive
power from the +5 V and 12 V supplies. Each processor has a separate VRM to power its core;
however, two processors share a VRM to power their cache.
Table 55. Processor VRM Connectors (J2A2, J2B1, J2C1): Add-in VRM Connector
Pin Listing
Pin
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
B1
B2
B3
B4
B5
B6
B7
B8
B9
102
Signal
P5VIN1
P5VIN2
P5VIN3
P12VIN1
P12VIN3
P1SHARE
VID0
VID2
VID4
VCCP1
VSS1
VCCP2
VSS2
VCCP3
VSS3
VCCP4
VSS4
VCCP5
VSS5
VCCP6
P5VIN4
P5VIN5
P5VIN6
P12VIN2
RES
OUTEN
VID1
VID3
PWRGOOD
Type*
POWER
POWER
POWER
POWER
POWER
OUT
OUT
OUT
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
OUT
OUT
OUT
SKA4 Baseboard Product Guide
continued