FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 238

• Manufacturer Part Number: FDC37B78X
• Description: Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
• Manufacturer: SMSC Corporation

DISK DRIVE TIMING
*X specifies one MCLK period and Y specifies one WCLK period.
MCLK = 16 x Data Rate (at 500 kb/s MCLK = 8 MHz)
WCLK = 2 x Data Rate (at 500 kb/s WCLK = 1 MHz)
nWDATA
nRDATA
nDS0-1,
nINDEX
MTR0-1
nDS0-3
NAME
nSTEP
nIOW
nDIR
t1
t2
t3
t4
t5
t6
t7
t8
t9
nDIR Set Up to STEP 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, MTRO-1 from End of nIOW
FIGURE 20 - DISK DRIVE TIMING (AT MODE ONLY)
TABLE 99 - DISK DRIVE TIMING (AT MODE ONLY)
t9
DESCRIPTION
t1
t6
t7
t8
t2
238
t4
MIN
t3
t5
TYP
132
24
96
20
40
25
.5
4
2
MAX
t9
UNITS
X*
X*
X*
X*
X*
X*
ns
Y*
ns