參數(shù)資料
型號: MC68EC000EI20
廠商: Freescale Semiconductor
文件頁數(shù): 4/26頁
文件大?。?/td> 0K
描述: IC MPU 32BIT 20MHZ 68-PLCC
標(biāo)準(zhǔn)包裝: 18
系列: M680x0
處理器類型: M680x0 32-位
速度: 20MHz
電壓: 3.3V,5V
安裝類型: 表面貼裝
封裝/外殼: 68-LCC(J 形引線)
供應(yīng)商設(shè)備封裝: 68-PLCC(25x25)
包裝: 管件
12
M68000 USER’S MANUAL ADDENDUM
MOTOROLA
7.0 MC68SEC000 AC ELECTRICAL SPECIFICATIONS — READ AND
WRITE CYCLES
Add the following table and Figures 9 and 10 to Section 10.16.
Applies to 3.3V and 5V.
(GND = 0 V; TA = TL to TH; see Figures 3 and 4)
NUM
CHARACTERISTIC
10MHz
16MHz
20MHz
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
6
Clock Low to Address Valid
35
30
25
ns
6A
Clock High to FC Valid
0
35
0
30
0
25
ns
7
Clock High to Address, Data Bus High Impedance (Maximum)
(Write)
—55—50—42
ns
8
Clock High to Address, FC Invalid (Minimum)
0—0—0—
ns
91
Clock High to AS, LDS, UDS Asserted
3
35
3
30
3
25
ns
112
Address Valid to AS, LDS, UDS Asserted (Read)/ AS Asserted
(Write)
20—15—10—
ns
11A2
FC Valid to AS, LDS, UDS Asserted (Read)/ AS Asserted (Write)
45
45
40
ns
121
Clock Low to AS, LDS, UDS Negated
3
35
3
30
3
25
ns
132
AS, LDS, UDS Negated to Address, FC Invalid
15
15
10
ns
142
AS (and LDS, UDS Read) Width Asserted
195
120
100
ns
14A2
LDS, UDS Width Asserted (Write)
95
60
50
ns
152
AS, LDS, UDS Width Negated
105
60
50
ns
16
Clock High to Control Bus High Impedance
55
50
42
ns
172
AS, LDS, UDS Negated to R/W Invalid
15
15
10
ns
181
Clock High to R/W High (Read)
0
35
0
30
0
25
ns
201
Clock High to R/W Low (Write)
0
35
0
30
0
25
ns
20A2,6 AS Asserted to R/W Low (Write)
10
10
10
ns
212
Address Valid to R/W Low (Write)
0—0—0—
ns
21A2
FC Valid to R/W Low (Write)
50
30
25
ns
222
R/W Low to DS Asserted (Write)
50
30
25
ns
23
Clock Low to Data-Out Valid (Write)
35
30
25
ns
252
AS, LDS, UDS Negated to Data-Out Invalid (Write)
30
15
10
ns
262
Data-Out Valid to LDS, UDS Asserted (Write)
30
15
10
ns
275
Data-In Valid to Clock Low (Setup Time on Read)
5—5—5—
ns
282
AS, LDS, UDS Negated to DTACK Negated (Asynchronous Hold)
0
110
0
110
0
95
ns
28A
Clock High to DTACK Negated
0
110
0
110
0
95
ns
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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