82091AA Datasheet, PDF (169/204 Pages) Intel Corporation – ADVANCED INTEGRATED PERIPHERAL (AIP)

82091AA
11 4 AC Characteristics
Symbol
Table 42 AC Specifications (V_CC^e5V g 10% T_amb ^e 0 C to 70 C)
Parameter
24 MHz
Min
Max
Units
Notes
t1a
Clock Rise and Fall Time
10
ns
1
t1b
Clock High Time
16
ns
1
t1c
Clock Low Time
16
ns
1
t1d
Clock Period
41 66
41 66
ns
2
t1e
Internal Clock Period
3
Figure
71
71
71
71
NOTES
1 Clock input high level test points for clock high time and clock rise fall times are 3 5V with V_CC at 5V g10% and 2 0V
with V_CC at 3 3V V_CC g10% Clock input low level test point for clock low time and clock rise fall time is 0 8V
2 Clock input test point for clock period is 0 8V
3 Certain Floppy Disk Controller module timings are a function of the selected data rate The nominal values for the internal
clock period (t1e) for the various data rates are
Disk Drive
Disk Rate
1 Mbps
500 Kbps
300 Kbps
250 Kbps
Internal Clock Period
( nominal values)
24 MHz
125 ns
250 ns
420 ns
500 ns
All information contained in ( ) in the following tables represents 3 3V specifications
Table 43 AC Specifications (V_CC^e 5V g 10% or 3 3V g 0 3V T_amb^e0 C to 70 C)
Symbol
Parameter
Min
Max Units Notes
Host
SA 10 0
t2a
SA 10 0 Setup to IORC IOWC Active
18 (25)
ns
t2b
SA 10 0 Hold from IORC IOWC Inactive
0
ns
SD 7 0
t3a
SD 7 0 Valid Delay from IORC Active
70 (100) ns
1
t3b
SD 7 0 Float Delay from IORC Inactive
5
35 (40) ns
t3c
SD 7 0 Setup to IOWC Inactive
35
ns
t3d
SD 7 0 Hold from IOWC Inactive
0
ns
Figure
72 73
72 73
72
72
73
73
169