參數(shù)資料
型號: MC68HC000FN8
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: Addendum to M68000 User Manual
中文描述: 32-BIT, 8 MHz, MICROPROCESSOR, PQCC68
封裝: PLASTIC, LCC-68
文件頁數(shù): 13/26頁
文件大?。?/td> 124K
代理商: MC68HC000FN8
13
M68000 USER’S MANUAL ADDENDUM
MOTOROLA
AC ELECTRICAL SPECIFICATIONS — READ AND WRITE CYCLES (Continued)
Applies to 3.3V and 5V.
NOTES:
1.
For a loading capacitance of less than or equal to 50 pF, subtract 5 ns from the value given in the maximum columns.
2.
Actual value depends on clock period.
3.
If #47 is satisfied for both DTACK and BERR, #48 may be ignored. In the absence of DTACK, BERR is an asynchronous input
using the asynchronous input setup time (#47).
4.
For power-up, the MC68SEC000 must be held in the reset state for 100 ms to allow stabilization of on-chip circuitry. After the
system is powered up, #56 refers to the minimum pulse width required to reset the controller.
5.
If the asynchronous input setup time (#47) requirement is satisfied for DTACK, the DTACK asserted to data setup time (#31)
requirement can be ignored. The data must only satisfy the data-in to clock low setup time (#27) for the following clock cycle.
When AS and R/W are equally loaded (
±
20%), subtract 5 ns from the values given in these columns.
The minimum value must be met to guarantee proper operation. If the maximum value is exceeded, BG may be reasserted.
6.
7.
NUM
CHARACTERISTIC
10MHz
MIN
0
0
16MHz
MIN
0
0
20MHz
MIN
0
0
UNIT
MAX
150
65
MAX
90
50
MAX
75
42
29
29A
30
31
2,5
32
33
34
35
36
7
38
AS, LDS, UDS Negated to Data-In Invalid (Hold Time on Read)
AS, LDS, UDS Negated to Data-In High Impedance (Read)
AS, LDS, UDS Negated to BERR Negated
DTACK Asserted to Data-In Valid (Setup Time on Read)
ns
ns
ns
ns
HALT and RESET Input Transition Time
Clock High to BG Asserted
Clock High to BG Negated
BR Asserted to BG Asserted
BR Negated to BG Negated
0
1.5
1.5
150
35
35
3.5
3.5
0
1.5
1.5
150
30
30
3.5
3.5
0
1.5
1.5
150
25
25
3.5
3.5
ns
ns
ns
Clks
Clks
BG Asserted to Control, Address, Data Bus High Impedance (AS
Negated)
BG Width Negated
AS, LDS, UDS Negated to AVEC Negated
Asynchronous Input Setup Time
55
50
42
ns
39
44
47
5
48
2,3
52
53
55
56
4
58
7
58A
7
1.5
0
5
55
1.5
0
5
50
1.5
0
5
42
Clks
ns
ns
BERR Asserted to DTACK Asserted
20
10
10
ns
Data-In Hold from Clock High
Data-Out Hold from Clock High (Write)
R/W Asserted to Data Bus Impedance Change (Write)
HALT, RESET Pulse Width
0
0
20
10
0
0
10
10
0
0
0
ns
ns
ns
Clks
10
BR Negated to AS, LDS, UDS, R/W Driven
1.5
1.5
1.5
Clks
BR Negated to FC Driven
1
1
1
Clks
相關(guān)PDF資料
PDF描述
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