spd6722qcce Intel Corporation, spd6722qcce Datasheet - Page 117

• Manufacturer Part Number: spd6722qcce
• Description: Isa-to-pc-card Pcmcia Controllers
• Manufacturer: Intel Corporation

Datasheet
1. The Setup time is determined by the value programmed into the Setup Timing register, index 3Ah/3Dh. Using the Timer Set
2. The Command time is determined by the value programmed into the Command Timing register, index 3Bh/3Eh. Using the
3. The Recovery time is determined by the value programmed into the Recovery Timing register, index 3Ch/3Fh. Using the
4. Based on an internal clock period of 40 ns (25 MHz).
(TC from system)
Symbol
DMA DATA[15:0]
(DACK* to card)
0 default value of 01h, the setup time would be 70 ns. S = (N
page
Timer Set 0 default value of 06h, the Command time would be 270 ns. C = (N
Timer Set 0 default value of 03h, the hold (Recovery) time would be 150 ns. R = (N
Table 36. DMA Read Cycle Timing (PD6722 only) (Sheet 2 of 2)
Figure 28. DMA Read Cycle Timing
t
t
t
7
8
9
-VPP_VALID
(TC to card)
-IORD, -OE
109.
(DACK*)
-CE[2:1]
to card
-IOWR
System TC (-VPP_VALID high) to -IOWR
-IOWR to begin of card TC (-WE)
End of card TC (-WE) to -IOWR inactive
(high)
-WAIT
IRQ10
(DRQ)
-REG
IRQ9
-WE
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t
1
t
Parameter
7
t
2
4
4
t
8
t
5
ISA-to-PC-Card (PCMCIA) Controllers — PD6710/’22
pres
t
3
N
val
+ 1), see
t
pres
6
“PC Card Bus Timing Calculations” on
t
MIN
9
25
25
pres
40
N
val
+ 1), see page 109.
N
val
+ 1), see page 109.
MAX
t
4
50
50
Units
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