CL-PD6710/’22
ISA–to–PC-Card Host Adapters
Default minimum Command time = (C × Tcp) – 10 ns = {7 × 40 ns} – 10 ns = 270 ns
Default minimum Recovery time = (R × Tcp) – 10 ns = {4 × 40 ns} – 10 ns = 150 ns
Equation 15-9
Equation 15-10
15.3.7 PC Card Socket Timing
Table 15-12. Memory Read/Write Timing (Word Access)
Symbol
Parameter
MIN
MAX
Units
-CE[2:1], -REG, Address, and Write Data setup to Command
active
t
(S × Tcp) – 10
ns
1
1
2
t
t
t
t
t
t
t
Command pulse width
(C × Tcp) – 10
(R × Tcp) – 10
ns
ns
2
3
4
5
6
7
8
3
Address hold and Write Data valid from Command inactive
4
-WAIT active from Command active
(C – 2)Tcp – 10
Tcp + 10
ns
ns
ns
ns
ns
Command hold from -WAIT inactive
Data valid from -WAIT inactive
Data setup before -OE inactive
Data hold after -OE inactive
(2 Tcp) + 10
(2 Tcp) + 10
0
1
2
3
4
The Setup time is determined by the value programmed into the Setup Timing register, index 3Ah/3Dh. Using the Timer
Set 0 default value of 01h, the setup time would be 70 ns. S = (N × N + 1), see page 98.
pres
val
The Command time is determined by the value programmed into the Command Timing register, index 3Bh/3Eh. Using
the Timer Set 0 default value of 06h, the Command time would be 270 ns. C = (N × N + 1), see page 98.
pres
val
The Recovery time is determined by the value programmed into the Recovery Timing register, index 3Ch/3Fh. Using the
Timer Set 0 default value of 03h, the hold (Recovery) time would be 150 ns. R = (N × N + 1), see page 98.
pres
val
For typical active timing programmed at 280 ns, maximum -WAIT timing is 190 ns after Command active.
-REG, -CE[2:1],
A[25:0]
t
t
3
1
t
2
-OE, -WE
-WAIT
t
5
t
4
D[15:0]
Write Cycle
t
t
6
8
t
7
D[15:0]
Read Cycle
May 1997
99
PRELIMINARY DATA SHEET v3.1
ELECTRICAL SPECIFICATIONS
CIRRUS [ CIRRUS LOGIC ]
