Intel Xeon Processor and Intel E7500/E7501Chipset Compatible Platform Design Guide

System Bus Routing Guidelines
68 Intel
®
Xeon™ Processor and Intel
®
E7500/E7501 Chipset Compatible Platform Design Guide
5.3 Routing Guidelines for Asynchronous GTL+ and
Miscellaneous Signals
Table 5-7 enumerates the remainder of the processor signals discussed in this document.
NOTES:
1. These signals only exist on the Intel Xeon processor with 512-KB L2 cache (INT-mPGA package).
Table 5-7. Asynchronous GTL+ and Miscellaneous Signals
Signal Name Type
Processor
I/O Type
Driven By Received By
A20M# Async GTL+ I Intel
®
ICH3-S Processor
BSEL[1:0] Other O Processor External Logic
COMP[1:0] Analog I Pull-down Processor
FERR#/PBE# Async GTL+ O Processor ICH3-S
IERR# Async GTL+ O Processor
External Logic (such as
Baseboard Management
Controller)
IGNNE# Async GTL+ I ICH3-S Processor
INIT# Async GTL+ I ICH3-S Processor
LINT[1:0] Async GTL+ I ICH3-S Processor
ODTEN Other I Pull-up / Pull-down Processor
PROCHOT# Async GTL+ O Processor External Logic
PWRGOOD Other I External Logic Processor
SLP# Async GTL+ I ICH3-S Processor
SM_ALERT#
1
SMBUS (3.3 V) O Processor/Controller Controller
SM_CLK
1
SMBUS (3.3 V) I/O Processor/Controller Processor/Controller
SM_DAT
1
SMBUS (3.3 V) I/O Processor/Controller Processor/Controller
SM_EP_A[2:0]
1
SMBUS (3.3 V) I Pull-up / Pull-down Processor
SM_TS_A[1:0]
1
SMBUS (3.3 V) I Pull-up / Pull-down Processor
SM_WP
1
SMBUS (3.3 V) I External Logic Processor
SMI# Async GTL+ I ICH3-S Processor
STPCLK# Async GTL+ I ICH3-S Processor
THERMDA Other O Processor Thermal Sensor
THERMDC Other O Processor Thermal Sensor
THERMTRIP# Async GTL+ O Processor External Logic
VCCA Power I RLC Filter Circuit Processor
VCCIOPLL Power I RLC Filter Circuit Processor
VCCSENSE Other O Processor Test Point
VID[4:0] Other O Processor Voltage Regulator
GTLREF Power I Pull-up / Pull-down Processor/MCH
VSSA Power I RLC Filter Circuit Processor
VSSSENSE Other O Processor Test Point