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W83627UHG
18.3.5
SMBus Timing
SMBCLK
SMBDAT
P
S
P
S
TBUF
THD:STA
TLOW TR
THD:DAT
THIGH
TF
TSU:DAT
TSU:STA
TSU:STO
18.3.6
Floppy Disk Drive Timing
FDC: Data rate = 1MB, 500KB, 300KB, 250KB/sec.
PARAMETER
SYM.
MIN.
TYP.
(NOTE 1)
MAX.
UNIT
DIR# setup time to STEP#
TDST
1.0/1.6
/2.0/4.0
S
DIR# hold time from STEP#
TSTD
24/40
/48/96
S
STEP# pulse width
TSTP
6.8/11.5
/13.8/27.
8
7/11.7
/14/28
7.2/11.9
/14.2/28.
2
S
STEP# cycle width
TSC
NOTE 2
mS
INDEX# pulse width
TIDX
125/250
/417/500
nS
RDATA# pulse width
TRD
40
nS
WD# pulse width
TWD
100/185
/225/475
125/210
/250/500
150/235
/275/525
nS
Notes:
1. Typical values for T = 25°C and normal supply voltage.
2. Programmable from 0.5 mS through 32 mS as described in step rate table.
(Please refer to the description of the SPECIFY command set.)
Step Rate Table
Publication Release Date: March 24, 2008
-201-
Revision 1.44