FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 144

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

(AT Mode timin g only)
*X speci fi es one MCL K period and Y specifies on e WCLK pe riod .
MCLK = Con trol ler Cl ock to FDC (See Table 6 ).
WCLK = 2 x D ata Rate (See Table 6 ).
nM TR0-1
t1
t2
t3
t4
t5
t6
t7
t8
t9
nWDAT A
nDS0-1,
nRDATA
nDS0-3
nI NDEX
nSTEP
nIOW
nDI R
nDIR Set Up to nSTEP Low
nSTEP Active Time Low
nDIR Hol d Time After nSTEP
nSTEP Cycle Time
nDS0-1 Hold Time from nSTEP Low
nINDEX Pulse Width
nRDATA Active Time Low
nWDATA Write Data Wi dth Low
nDS0-1 , MTR0-1 from En d of n IOW
Parameter
t 9
FIGURE 7 - DISK DRIVE TIMING
t 1
t 6
t 7
t 8
t 2
144
m in
t 4
typ
132
t 3
24
96
20
40
25
t 5
.5
4
2
max
t 9
units
ns
X*
X*
X*
X*
X*
X*
ns
Y*