Intel L7555 AT80604004875AA User Manual
Product codes
AT80604004875AA
Electrical Specifications
50
Intel® Xeon® Processor 7500 Datasheet, Volume 1
Figure 2-14. SMBus Timing Waveform
Figure 2-15. SMBus Valid Delay Timing Waveform
Table 2-30. FLASHROM Signal Group AC Timing Specifications
Symbol
Parameter
Min
Max
Unit
Figure
Notes
F
FLASHROM
FLASHROM_CLK Frequency
0
66.67
MHz
Slew
DATAI
FLASHROM_DATI Edge Rate
0.5
V/ns
1
Notes:
1. All input edge rates are specified between V
IL
(max)
and V
IH
(min), and output edge rates are specified between
V
OL
(max)
and V
OH
(min).
Slew
DATAO
FLASHROM_DATO Edge Rate
0.7
2.3
V/ns
2
2. These values are based on driving a 50Ω
transmission line into a 50Ω pullup.
t
CS_AS
FLASHROM_CS[3:0]_N assertion
before first FLASHROM_CLK
10
ns
t
CS_DE
FLASHROM_CS[3:0]_N deassertion
after last FLASHROM_CLK
12
ns
t
SETUP
FLASHROM_DATI setup time
6
ns
t
HOLD
FLASHROM_DATI hold time
0
ns
t
DELAY
FLASHROM_DATO Valid Delay
–2.0
2.0
ns
Data
Clk
P
P
S
S
STOP
STOP
START
START
t
LOW
t
R
t HD;STA
t
HD;DAT
tBUF
HIGH
t
t
SU;DAT
t
t
SU;STA
tHD;STA
SU;STO
t
F
DATA OUTPUT
DATA VALID
SM_CLK
SM_DAT
TAA