FDC37C78_07 SMSC [SMSC Corporation], FDC37C78_07 Datasheet - Page 79
FDC37C78_07
Manufacturer Part Number
FDC37C78_07
Description
Floppy Disk Controller
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.FDC37C78_07.pdf
(82 pages)
- Current page: 79 of 82
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*X specifies one MCLK period and Y specifies one WCLK period.
MCLK = Controller Clock to FDC (See Table 6).
WCLK = 2 x Data Rate (See Table 6).
nMTR0-1
t1
t2
t3
t4
t5
t6
t7
t8
t9
nWDATA
nDS0-1,
nRDATA
nINDEX
nDS0-1
nSTEP
nIOW
nDIR
nDIR Set Up to nSTEP Low
nSTEP Active Time Low
nDIR Hold Time After nSTEP
nSTEP Cycle Time
nDS0-1 Hold Time from nSTEP Low
nINDEX Pulse Width
nRDATA Active Time Low
nWDATA Write Data Width Low
nDS0-1, MTR0-1 from End of nIOW
Parameter
t9
t1
FIGURE 7 - DISK DRIVE TIMING
79
t6
t7
t8
t2
min
t4
typ
132
t3
24
96
20
40
25
t5
.5
4
2
max
t9
units
ns
X*
X*
X*
X*
X*
X*
ns
Y*
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