
Intel Xeon Processor with 512 KB L2 Cache
Datasheet
33
2. The processor core clock frequency is derived from BCLK.
3. The period specified here is the average period. A given period may vary from this specification as governed
by the period stability specification (T2).
4. For the clock jitter specification, refer to the CK00 Clock Synthesizer/Driver Design Guidelines.
5. In this context, period stability is defined as the worst case timing difference between successive crossover
voltages. In other words, the largest absolute difference between adjacent clock periods must be less than
the period stability.
6. Slew rate is measured between the 35% and 65% points of the clock swing (VL and VH).
.
1. Unless otherwise noted, all specifications in this table apply to all processor frequencies and cache sizes.
2. Not 100% tested. Specified by design characterization.
3. All common clock AC timings for AGTL+ signals are referenced to the Crossing Voltage (VCROSS) of the
BCLK[1:0] at rising edge of BCLK0. All common clock AGTL+ signal timings are referenced at GTLREF at the
processor core.
4. Valid delay timings for these signals are specified into the test circuit described in
Figure 5 and with GTLREF
at 2/3 * VCC ± 2%.
5. Specification is for a minimum swing defined between AGTL+ VIL_MAX to VIH_MIN. This assumes an edge rate
of 0.3 V/nS to 4.0 V/nS.
6. RESET# can be asserted (active) asynchronously, but must be deasserted synchronously.
7. This should be measured after V
CC and BCLK[1:0] become stable.
8. Maximum specification applies only while PWRGOOD is asserted.
.
Table 15. Front Side Bus Common Clock AC Specifications
T# Parameter
Min
Max
Unit
Figure
Notes1, 2, 3
T10: Common Clock Output Valid Delay
0.12
1.27
nS
4
T11: Common Clock Input Setup Time
0.65
N/A
nS
5
T12: Common Clock Input Hold Time
0.40
N/A
nS
5
T13: RESET# Pulse Width
1.00
10.00
mS
6, 7, 8
Table 16. Front Side Bus Source Synchronous AC Specifications (Page 1 of 2)
T# Parameter
Min
Max
Unit
Figure
Notes
T20: Source Sync. Output Valid Delay (first data/
address only)
0.20
1.30
nS
1, 2, 3, 4,
5
T21: TVBD Source Sync. Data Output Valid Before
Data Strobe
0.85
nS
1, 2, 3, 4,
5, 8
T22: TVAD Source Sync. Data Output Valid After
Data Strobe
0.85
nS
1, 2, 3, 4,
5, 8
T23: TVBA Source Sync. Address Output Valid
Before Address Strobe
1.88
nS
1, 2, 3, 4,
5, 8
T24: TVAA Source Sync. Address Output Valid After
Address Strobe
1.88
nS
1, 2, 3, 4,
5, 9
T25: TSUSS Source Sync. Input Setup Time
0.21
nS
1, 2, 3, 4,
6
T26: THSS Source Sync. Input Hold Time
0.21
nS
1, 2, 3, 4,
6
T27: TSUCC Source Sync. Input Setup Time to
BCLK
0.65
nS
1, 2, 3, 4,
7
T28: TFASS First Address Strobe to Second Address
Strobe
1/2
BCLKs
1, 2, 3, 4,
10, 14