pc8477b National Semiconductor Corporation, pc8477b Datasheet - Page 45

• Manufacturer Part Number: pc8477b
• Description: Advanced Floppy Disk Controller
• Manufacturer: National Semiconductor Corporation

6 0 Device Description
6 2 8 Drive Control Timing
6 2 9 Read Data Timing
Symbol
t
t
t
t
t
t
DRV
DST
STD
STP
SRT
IW
Symbol
t
RDW
DR0 – DR3 MTR0 – MTR3 from End of WR
DIR Setup to STEP Active
DIR Hold from STEP Inactive
STEP Active High Pulse Width
STEP Rate Time (see Table 4-13)
Index Pulse Width
Read Data Pulse Width
Parameter
(Continued)
Parameter
FIGURE 6-7 Drive Control Timing
FIGURE 6-8 Read Data Timing
45
Min
50
t
Min
100
SRT
6
8
1
Max
Max
100
TL F 11332 – 22
TL F 11332 – 23
Units
ns
Units
ms
ms
ns
ms
ms
ns