參數(shù)資料
型號: DZPD6722VCCE
廠商: INTEL CORP
元件分類: 總線控制器
英文描述: ISA-to-PC-Card (PCMCIA) Controllers
中文描述: PCMCIA BUS CONTROLLER, PQFP208
封裝: LQFP-208
文件頁數(shù): 118/138頁
文件大小: 723K
代理商: DZPD6722VCCE
PD6710/
22
ISA-to-PC-Card (PCMCIA) Controllers
118
Datasheet
Table 37. DMA Write Cycle Timing (PD6722 only)
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, -IOWR, -WE, and Write Data setup to -IORD
active
(S
×
Tcp)
10
ns
t
3
Command: -IORD pulse width
2
(C
×
Tcp)
10
ns
t
4
Recovery: -IORD inactive to end of cycle
3
(R
×
Tcp)
10
ns
t
5
-WAIT active from -IORD active
(C
2)Tcp
10
ns
t
6
-WAIT inactive to -IORD inactive
2 Tcp
ns
t
7
System TC (-VPP_VALID high) to -IORD
40
ns
t
8
-IORD to begin of card TC (-OE)
4
25
50
ns
t
9
End of card TC (-OE) to -IORD inactive
4
25
50
ns
t
10
Data valid from -WAIT inactive
Tcp + 10
ns
t
11
Data setup before -OE inactive
(2 Tcp) +10
ns
t
12
Data hold after -OE inactive
0
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).
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