LPC47S457-NC SMSC [SMSC Corporation], LPC47S457-NC Datasheet - Page 234

• Manufacturer Part Number: LPC47S457-NC
• Description: Advanced I/O with X-Bus Interface
• Manufacturer: SMSC [SMSC Corporation]

11.5 Floppy Disk Timing
SMSC LPC47S45x
*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)
Note: The nDS0-1 setup and hold times must be met by software.
nWDAT
nRDAT
nINDEX
nDS0-1
nSTEP
NAME
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 (Note)
nINDEX Pulse Width
nRDATA Active Time Low
nWDATA Write Data Width Low
nDS0-1, Setup Time nDIR Low (Note)
t9
FIGURE 25 − FLOPPY DISK DRIVE TIMING (AT MODE ONLY)
t1
DESCRIPTION
DATASHEET
t6
Page 234 of 259
t7
t8
t2
t4
MIN
0
t3
t5
TYP
132
24
96
20
40
.5
4
2
MAX
UNITS
X*
X*
X*
X*
X*
X*
ns
Y*
ns
Rev. 06-01-06