參數(shù)資料
型號: CD1865
廠商: Intel Corp.
英文描述: Intelligent Eight-Channel Communications Controller
中文描述: 智能八通道通信控制器
文件頁數(shù): 137/150頁
文件大?。?/td> 871K
代理商: CD1865
Intelligent Eight-Channel Communications Controller
CD1865
Datasheet
137
All times are based on a master clock (CLK) of 15 MHz. All times are measured in nanoseconds.
Intel-style handshake signals (where appropriate) are shown in {curly brackets}.
Table 11. Unclocked Timings
(Sheet 1 of 2)
Number
Description
MIN1
MAX1
Notes
t
1
Setup time, Address to CS*, DS* {CS*, RD* or WR*}
3
2
t
2
Setup time, R/W* to CS* or DS*
0
2
t
3
Hold time, Address after CS* or DS* {CS* or RD* or WR*}
0
3
,
4
t
4
R/W* hold time after CS* and DS*
3
3
,
4
t
5
Delay time, DTACK* assert to valid Read Data:
If DTACKDLY = 0
If DTACKDLY = 1
25
-12
t
6
DTACK* assert after CS* or DS* {RD*} or ACKIN*
If DTACKDLY = 0
If DTACKDLY = 1
75
85
2
,
5
t
7
Hold time, Read Data after CS* and DS*{RD*} high
1
12
3
,
6
,
7
t
8
CS* or DS* {RD*} high from DTACK* low
If DTACKDLY = 0
If DTACKDLY = 1
25
1
4
,
4.
,
8
,
7
t
9
DTACK* inactive from (CS* or ACKIN*) or DS* high
12
3
,
9
,
4
t
10
DS* {RD*} high pulse width
5
4
t
11
Setup time, Address to ACKIN*
10
10
,
11
t
12
Setup time, Write Data to DS* {or WR*} low
0
t
13
Hold time, Write Data after DS* {or WR*} high
0
t
14
x_REQ* deassert after DTACK* asserted
2
T
clk+30
12
t
15
Setup time, R/W* {WR*} and CS* to ACKIN* low
0
13
t
16
x_REQ* reassert delay after write to EOSRR
2
T
clk+30
14
,
15
t
17
ACKIN* assert/deassert to ACKOUT* assert/deassert prop delay
15
t
18
Data bus out of high-impedance after DS* {RD*} low
3
16
t
19
Setup time, Address to DS* {RD*} during acknowledge cycles
4
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