Intel 4 620 JM80547PG0722MM データシート
製品コード
JM80547PG0722MM
22
Datasheet
Electrical Specifications
.
2.7
GTL+ Asynchronous Signals
Legacy input signals (such as, A20M#, IGNNE#, INIT#, SMI#, and STPCLK#) use CMOS input
buffers. All of these signals follow the same DC requirements as GTL+ signals; however, the
outputs are not actively driven high (during a logical 0-to-1 transition) by the processor. These
signals do not have setup or hold time specifications in relation to BCLK[1:0].
buffers. All of these signals follow the same DC requirements as GTL+ signals; however, the
outputs are not actively driven high (during a logical 0-to-1 transition) by the processor. These
signals do not have setup or hold time specifications in relation to BCLK[1:0].
All of the GTL+ Asynchronous signals are required to be asserted/de-asserteded for at least six
BCLKs for the processor to recognize the proper signal state. See
BCLKs for the processor to recognize the proper signal state. See
for the DC specifications for the GTL+ Asynchronous signal groups. See
for additional timing requirements for entering and leaving the low power states.
2.8
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 Pentium 4 processor be first in the TAP chain and followed by any other
components within the system. A translation buffer should be used to connect to the rest of the
chain unless one of the other components is capable of accepting an input of the appropriate
voltage level. Similar considerations must be made for TCK, TMS, TRST#, TDI, and TDO. Two
copies of each signal may be required, with each driving a different voltage level.
recommended that the Pentium 4 processor be first in the TAP chain and followed by any other
components within the system. A translation buffer should be used to connect to the rest of the
chain unless one of the other components is capable of accepting an input of the appropriate
voltage level. Similar considerations must be made for TCK, TMS, TRST#, TDI, and TDO. Two
copies of each signal may be required, with each driving a different voltage level.
Table 2-4. Signal Characteristics
Signals with R
TT
Signals with no R
TT
A[35:3]#, ADS#, ADSTB[1:0]#, AP[1:0]#, BINIT#,
BNR#, BOOTSELECT
BNR#, BOOTSELECT
1
, BPRI#, D[63:0]#, DBI[3:0]#,
DBSY#, DEFER#, DP[3:0]#, DRDY#, DSTBN[3:0]#,
DSTBP[3:0]#, HIT#, HITM#, LOCK#, MCERR#,
PROCHOT#, REQ[4:0]#, RS[2:0]#, RSP#, TRDY#
DSTBP[3:0]#, HIT#, HITM#, LOCK#, MCERR#,
PROCHOT#, REQ[4:0]#, RS[2:0]#, RSP#, TRDY#
NOTES:
1.
The BOOTSELECT signal has a 500–5000
Ω pull-up to V
TT
rather than on-die termination.
A20M#, BCLK[1:0], BPM[5:0]#, BR0#, BSEL[2:0],
COMP[1:0], FERR#/PBE#, IERR#, IGNNE#, INIT#,
LINT0/INTR, LINT1/NMI, PWRGOOD, RESET#,
SKTOCC#, SMI#, STPCLK#, TDO, TESTHI[13:0],
THERMDA, THERMDC, THERMTRIP#, VID[5:0],
VTTPWRGD, GTLREF, TCK, TDI, TRST#, TMS
COMP[1:0], FERR#/PBE#, IERR#, IGNNE#, INIT#,
LINT0/INTR, LINT1/NMI, PWRGOOD, RESET#,
SKTOCC#, SMI#, STPCLK#, TDO, TESTHI[13:0],
THERMDA, THERMDC, THERMTRIP#, VID[5:0],
VTTPWRGD, GTLREF, TCK, TDI, TRST#, TMS
Open Drain Signals
2
2.
Signals that do not have R
TT
, nor are actively driven to their high-voltage level.
BSEL[2:0], VID[5:0], THERMTRIP#, FERR#/PBE#,
IERR#, BPM[5:0]#, BR0#, TDO, VTT_SEL, LL_ID[1:0],
MSID[1:0]
IERR#, BPM[5:0]#, BR0#, TDO, VTT_SEL, LL_ID[1:0],
MSID[1:0]
Table 2-5. Signal Reference Voltages
GTLREF
V
TT
/2
BPM[5:0]#, LINT0/INTR, LINT1/NMI, RESET#, BINIT#,
BNR#, HIT#, HITM#, MCERR#, PROCHOT#, BR0#,
A[35:0]#, ADS#, ADSTB[1:0]#, AP[1:0]#, BPRI#, D[63:0]#,
DBI[3:0]#, DBSY#, DEFER#, DP[3:0]#, DRDY#,
DSTBN[3:0]#, DSTBP[3:0]#, LOCK#, REQ[4:0]#, RS[2:0]#,
RSP#, TRDY#
BNR#, HIT#, HITM#, MCERR#, PROCHOT#, BR0#,
A[35:0]#, ADS#, ADSTB[1:0]#, AP[1:0]#, BPRI#, D[63:0]#,
DBI[3:0]#, DBSY#, DEFER#, DP[3:0]#, DRDY#,
DSTBN[3:0]#, DSTBP[3:0]#, LOCK#, REQ[4:0]#, RS[2:0]#,
RSP#, TRDY#
BOOTSELECT, VTTPWRGD, A20M#,
IGNNE#, INIT#, PWRGOOD
IGNNE#, INIT#, PWRGOOD
STPCLK#, TCK
1
, TDI
NOTES:
1.
These signals also have hysteresis added to the reference voltage. See
for more information.