參數(shù)資料
型號(hào): PD6710
廠商: Intel Corp.
英文描述: ISA-to-PC-Card (PCMCIA) Controllers
中文描述: ISA -到- PC卡(PCMCIA)的控制器
文件頁數(shù): 116/138頁
文件大?。?/td> 723K
代理商: PD6710
PD6710/
22
ISA-to-PC-Card (PCMCIA) Controllers
116
Datasheet
Figure 27. 16-Bit System to 8-Bit I/O Card: Odd Byte Timing
Table 36. DMA Read Cycle Timing (PD6722 only)
(Sheet 1 of 2)
Symbol
Parameter
MIN
MAX
Units
t
1
DRQ (IRQ10) and DACK* (IRQ9) active to DMA cycle begin
40
ns
t
2
-CE[2:1], -REG, -IORD, -OE, and Write Data setup to -IOWR
active
1
(S
×
Tcp)
10
ns
t
3
Command: -IOWR pulse width
2
(C
×
Tcp)
10
ns
t
4
Recovery: -IOWR inactive to end of cycle
3
(R
×
Tcp)
10
ns
t
5
-WAIT active from -IOWR active
(C
2)Tcp
10
ns
t
6
-WAIT inactive to -IOWR inactive
2 Tcp
ns
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
pres
×
N
val
+ 1), see
PC Card Bus Timing Calculations
on
page 109
.
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
val
+ 1), see page
109
.
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
pres
×
N
val
+ 1), see page
109
.
4. Based on an internal clock period of 40 ns (25 MHz).
-REG,
A[25:0]
-IOIS16
t
3
-CE1
-CE2
D[7:0]
Odd Data
t
2
Write Cycle
D[7:0]
Read Cycle
Odd Data
D[15:8]
Read or
Write Cycle
XX
-IOWR, -IORD
t
4
t
5
t
6
t
1
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