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| 型號： | MC68EC000CAA20 |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 8/26頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC MPU 32BIT 20MHZ 64-QFP |
| 標準包裝： | 84 |
| 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： | 64-QFP |
| 供應(yīng)商設(shè)備封裝： | 64-QFP（14x14） |
| 包裝： | 托盤 |
16
M68000 USER’S MANUAL ADDENDUM
MOTOROLA
8.0 MC68SEC000 AC ELECTRICAL SPECIFICATIONS — BUS
ARBITRATION
Add the following table and Figure 11 to Section 10.17.
(GND = 0 Vdc; TA = TL to TH; refer to Figure 13)
Applies to 3.3V and 5V.
1. The minimum value must be met to guarantee proper operation. If the maximum value is exceeded, BG may be reasserted.
NUM
CHARACTERISTICp
10MHz
16MHz
20MHz
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
7
Clock High to Address, Data Bus High Impedance (Maximum)
—
55
—
50
—
42
ns
16
Clock High to Control Bus High Impedance
—
55
—
50
—
42
ns
33
Clock High to BG Asserted
0
35
0
30
0
25
ns
34
Clock High to BG Negated
0
35
0
30
0
25
ns
35
BR Asserted to BG Asserted
1.5
3.5
1.5
3.5
1.5
3.5
Clks
36
BR Negated to BG Negated
1.5
3.5
1.5
3.5
1.5
3.5
Clks
38
BG Asserted to Control, Address, Data Bus High Impedance (AS
Negated)
—55—50—42
ns
39
BG Width Negated
1.5
—
1.5
—
1.5
—
Clks
47
Asynchronous Input Setup Time
5—5—5—
ns
581
BR Negated to AS, LDS, UDS, R/W Driven
1.5
—
1.5
—
1.5
—
Clks
58A1
BR Negated to FC Driven
1—1—1—
Clks
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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