Datasheet
19
Electrical Specifications
Notes:
1.
Unless otherwise specified, signals have ODT in the package with 50
pulldown to V
SS
.
2.
PREQ#, BPM[7:0], TDI, TMS and BCLK_ITP_D[N/P] have ODT in package with 35
pullup to V
TT
.
3.
VCCPWRGOOD, VDDPWRGOOD, and VTTPWRGOOD have ODT in package with a 10 k
to 20 k
pulldown
to V
SS
.
4.
TRST# has ODT in package with a 1 k
to 5 k
pullup to V
TT
.
5.
All DDR signals are terminated to VDDQ/2
6.
DDR{0/1/2} refers to DDR3 Channel 0, DDR3 Channel 1, and DDR3 Channel 2.
7.
While TMS and TDI do not have On-Die Termination, these signals are weakly pulled up using a 1–5 k
resistor to V
TT
8.
While TCK does not have On-Die Termination, this signal is weakly pulled down using a 1–5 k
resistor to
V
SS
.
All Control Sideband Asynchronous signals are required to be asserted/de-asserted for
at least eight BCLKs for the processor to recognize the proper signal state. See
for the DC specifications. 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 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. Two copies of each signal may be
required with each driving a different voltage level.
Single ended
CMOS Output
VTT_VID[4:2]
Single ended
Analog Input
ISENSE
Reset Signal
Single ended
Reset Input
RESET#
PWRGOOD Signals
Single ended
Asynchronous Input
VCCPWRGOOD, VTTPWRGOOD, VDDPWRGOOD
Power/Other
Power
VCC, VTTA, VTTD, VCCPLL, VDDQ
Asynchronous CMOS Output
PSI#
Sense Points
VCC_SENSE, VSS_SENSE
Other
SKTOCC#, DBR#
Notes:
1.
Refer to
for signal descriptions.
2.
DDR{0/1/2} refers to DDR3 Channel 0, DDR3 Channel 1, and DDR3 Channel 2.
Table 2-4.
Signals with ODT
• QPI_DRX_DP[19:0], QPI_DRX_DN[19:0], QPI_DTX_DP[19:0], QPI_DTX_DN[19:0], QPI_CLKRX_D[N/P],
QPI_CLKTX_D[N/P]
• DDR{0/1/2}_DQ[63:0], DDR{0/1/2}_DQS_[N/P][7:0], DDR{0/1/2}_PAR_ERR#[0:2], VDDPWRGOOD
• BCLK_ITP_D[N/P]
• PECI
• BPM#[7:0], PREQ#, TRST#, VCCPWRGOOD, VTTPWRGOOD
Table 2-3.
Signal Groups (Sheet 2 of 2)
Signal Group
Type
Signals
1,2
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