參數(shù)資料
型號(hào): CD1284
廠商: Intel Corp.
英文描述: IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
中文描述: 符合IEEE 1284兼容并行接口控制器兩個(gè)高速異步串行端口
文件頁數(shù): 157/176頁
文件大小: 2255K
代理商: CD1284
IEEE 1284-Compatible Parallel Interface Controller
CD1284
Datasheet
157
8.3
AC Characteristics
8.3.1
Asynchronous Timing
Refer to the Figures 6-1 through 6-7 for the reference numbers in the following table.
Table 27. Asynchronous Timing Reference Parameters
(Sheet 1 of 2)
Timing
Number
Figure
Parameter
MIN
MAX
Unit
t
1
Figure
20
RESET* low pulse width
10
T
CLK
t
2
22
Address setup time to CS* or DS*
10
ns
t
3
22
R/W* setup time to CS* or DS*
10
ns
t
4
22
Address hold time after CS*
0
ns
t
5
22
R/W* hold time after CS*
0
ns
t
6
22
DTACK* low to read data valid
10
ns
t
7
22
DTACK* low from CS* or DS
2
2 T
CLK
4 T
CLK
+
30
ns
t
8
22
Data Bus tristate after CS* or DS* high
0
30
ns
t
9
22
CS* or DGRANT* high from DTACK* low
0
ns
t
10
22
DTACK* inactive from CS* or DGRANT* and DS* high
40
ns
t
11
22
DS* high pulse width
10
ns
t
12
23
Write data valid from CS* and DS* low
1T
CLK
ns
t
13
23
Write data hold time after DS* high
0
ns
t
14
21
Clock period (TCLK)
1, 3
40.0
1000
ns
t
15
21
Clock low time
1
0.3 T
CLK
0.7 T
CLK
ns
t
16
21
Clock high time
1
0.3 T
CLK
0.7 T
CLK
ns
t
17
24
Propagation delay, DGRANT* and DS* to DPASS*
35
ns
t
18
24
Setup time, SVCACK* to DS* and DGRANT*
10
ns
t
19
25
Setup time, DMAACK* to rising edge of CLK
10
ns
t
20
25
Hold time, read data after rising edge of CLK
10
30
ns
t
21
27
Setup time, write data to rising edge of CLK
0
ns
t
22
22
DTACK* active pull-up time
4
see note 4
ns
t
23
25
Data valid after falling edge of CLK (DMA read)
25
ns
t
24
25
27
Hold time, DMAREQ* after DMAACK* falling edge,
last DMA cycle
10
1 CLK
+
15
ns
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