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313079-001 Datasheet(PDF) 23 Page - Intel Corporation |
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313079-001 Datasheet(HTML) 23 Page - Intel Corporation |
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23 / 104 page  Dual-Core Intel® Xeon® Processor 5000 Series Datasheet 23 Electrical Specifications Table 2-7 outlines the signals which include on-die termination (RTT). Open drain signals are also included. Table 2-8 provides signal reference voltages. Notes: 1. Signals that do not have RTT, nor are actively driven to their high voltage level. 2. The on-die termination for these signals is not RTT. TCK, TDI, and TMS have an approximately 150 KΩ pullup to VTT. Notes: 1. These signals also have hysteresis added to the reference voltage. See Table 2-14 for more information. 2. Use Table 2-15 for signal FORCEPR# specifications. 2.8 GTL+ Asynchronous and AGTL+ Asynchronous Signals Input signals such as A20M#, FORCEPR#, IGNNE#, INIT#, LINT0/INTR, LINT1/NMI, SMI# and STPCLK# utilize GTL+ input buffers. Legacy output FERR#/PBE# and other non-AGTL+ signals IERR#, THERMTRIP# and PROCHOT# utilize GTL+ output buffers. All of these asynchronous GTL+ signals follow the same DC requirements as AGTL+ signals; however, the outputs are not driven high (during the electrical 0-to-1 transition) by the processor. FERR#/PBE#, IERR#, and IGNNE# have now been defined as AGTL+ asynchronous signals as they include an active p-MOS device. Asynchronous GTL+ and asynchronous AGTL+ signals do not have setup or hold time specifications in relation to BCLK[1:0]; however, all of the asynchronous GTL+ and asynchronous AGTL+ signals are required to be asserted/deasserted for at least six BCLKs in order for the processor to recognize them. See Table 2-15 for the DC specifications for the asynchronous GTL+ signal groups. 2.9 Test Access Port (TAP) Connection Due to the voltage levels supported by other components in the Test Access Port (TAP) logic, it is recommended that the processor(s) be first in the TAP chain and followed by any other components within the system. A translation buffer should be used to Table 2-7. Signal Description Table Signals with RTT Signals with no RTT A[35:3]#, ADS#, ADSTB[1:0]#, AP[1:0]#, BINIT#, BNR#, BPRI#, COMP[7:4], D[63:0]#, DBI[3:0]#, DBSY#, DEFER#, DP[3:0]#, DRDY#, DSTBN[3:0]#, DSTBP[3:0]#, FORCEPR#, HIT#, HITM#, LOCK#, MCERR#, PROCHOT#, REQ[4:0]#, RS[2:0]#, RSP#, TCK2, TDI2, TEST_BUS, TMS2, TRDY#, TRST#2 A20M#, BCLK[1:0], BPM[5:0]#, BR[1:0]#, BSEL[2:0], COMP[3:0], FERR#/PBE#, GTLREF_ADD_C[1:0], GTLREF_DATA_C[1:0], IERR#, IGNNE#, INIT#, LINT0/ INTR, LINT1/NMI, LL_ID[1:0], MS_ID[1:0], PWRGOOD, RESET#, SKTOCC#, SMI#, STPCLK#, TDO, TESTHI[11:0], THERMDA, THERMDA2, THERMDC, THERMDC2, THERMTRIP#, VCC_DIE_SENSE, VCC_DIE_SENSE2, VID[5:0], VID_SELECT, VSS_DIE_SENSE, VSS_DIE_SENSE2, VTTPWRGD Open Drain Signals1 BPM[5:0]#, BR0#, FERR#/PBE#, IERR#, PROCHOT#, TDO, THERMTRIP# Table 2-8. Signal Reference Voltages GTLREF VTT / 2 A[35:3]#, ADS#, ADSTB[1:0]#, AP[1:0]#, BINIT#, BNR#, BPM[5:0]#, BPRI#, BR[1:0]#, D[63:0]#, DBI[3:0]#, DBSY#, DEFER#, DP[3:0]#, DRDY#, DSTBN[3:0]#, DSTBP[3:0]#, FORCEPR#2, HIT#, HITM#, IERR#, LINT0/INTR, LINT1/NMI, LOCK#, MCERR#, RESET#, REQ[4:0]#, RS[2:0]#, RSP#, TRDY# A20M#, IGNNE#, INIT#, PWRGOOD1, SMI#, STPCLK#, TCK1, TDI1, TMS1, TRST#1, VTTPWRGD |
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