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Chapter 6 Advanced 266 Front-Side Bus AMD Athlon™ XP Processor Model 8 Specifications 25
25175H—March 2003 AMD Athlon™ XP Processor Model 8 Data Sheet
Preliminary Information
6.3 Advanced 266 FSB AMD Athlon™ System Bus
AC Characteristics
The AC characteristics for the AMD Athlon system bus of this
processor are shown in Table 4. The parameters are grouped
based on the source or destination of the signals involved.
Table 4. AMD Athlon™ System Bus AC Characteristics
Group Symbol Parameter Min Max Units Notes
All Signals
T
RISE
Output Rise Slew Rate 1 3 V/ns 1
T
FALL
Output Fall Slew Rate 1 3 V/ns 1
Forward
Clocks
T
SKEW-SAMEEDGE
Output skew with respect to
the same clock edge
–385ps2
T
SKEW-DIFFEDGE
Output skew with respect to a
different clock edge
–770ps2
T
SU
Input Data Setup Time 300 ps 3
T
HD
Input Data Hold Time 300 ps 3
C
IN
Capacitance on input Clocks 4 25 pF
C
OUT
Capacitance on output Clocks 4 12 pF
Sync
T
VAL
RSTCLK to Output Valid 250 2000 ps 4, 5
T
SU
Setup to RSTCLK 500 ps 4, 6
T
HD
Hold from RSTCLK 1000 ps 4, 6
Notes:
1. Rise and fall time ranges are guidelines over which the I/O has been characterized.
2. T
SKEW-SAMEEDGE
is the maximum skew within a clock forwarded group between any two signals or between any signal and its
forward clock, as measured at the package, with respect to the same clock edge.
T
SKEW-DIFFEDGE
is the maximum skew within a clock forwarded group between any two signals or between any signal and its
forward clock, as measured at the package, with respect to different clock edges.
3. Input SU and HD times are with respect to the appropriate Clock Forward Group input clock.
4. The synchronous signals include
PROCRDY, CONNECT, and CLKFWDRST.
5. T
VAL
is RSTCLK rising edge to output valid for PROCRDY. Test Load is 25 pF.
6. T
SU
is setup of CONNECT/CLKFWDRST to rising edge of RSTCLK. T
HD
is hold of CONNECT/CLKFWDRST from rising edge of
RSTCLK.