PD6710/’22 — ISA-to-PC-Card (PCMCIA) Controllers
Table 32. Word I/O Read/Write Timing
Symbol
Parameter
MIN
MAX
Units
t
-REG or Address setup to Command active1
Command pulse width2
(S × Tcp) – 10
(C × Tcp) – 10
(R × Tcp) – 10
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
1
t
2
t
Address hold and Write Data valid from Command inactive3
-WAIT active from Command active4
Command hold from -WAIT inactive
Card -IOIS16 delay from valid Address (PC Card specification)
-IOIS16 setup time before Command end
-CE2 delay from -IOIS16 active5
3
t
(C – 2)Tcp – 10
4
t
(2 Tcp) + 10
5
t
35
ref
t
t
t
t
(3 Tcp) + 10
6
7
6
9
Tcp – 10
Data valid from -WAIT inactive
Tcp + 10
Data setup before -IORD inactive
(2 Tcp) + 10
0
t
Data hold after -IORD inactive
10
1. 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
page 109.
× N + 1), see “PC Card Bus Timing Calculations” on
pres
val
2. 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 109.
pres
val
3. 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 109.
pres
val
4. For typical active timing programmed at 280 ns, maximum -WAIT timing is 190 ns after Command active.
5. -IOIS16 must go low within 3Tcp + 10 ns of the cycle beginning or -IOIS16 will be ignored and -CE will not be activated.
112
Datasheet
INTEL [ INTEL ]
