參數(shù)資料
型號: MC68HC11F1MFN4
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, EEPROM, 4 MHz, MICROCONTROLLER, PQCC68
封裝: PLASTIC, LCC-68
文件頁數(shù): 53/163頁
文件大?。?/td> 711K
代理商: MC68HC11F1MFN4
MOTOROLA
ELECTRICAL CHARACTERISTICS
MC68HC11F1
A-12
TECHNICAL DATA
NOTES:
1. Input clocks with duty cycles other than 50% affect bus performance.
2. Indicates a parameter affected by clock stretching. Add n(tcyc) to parameter value, where:
n = 1, 2, or 3 depending on values written to CSSTRH register.
3. All timing is shown with respect to 20% VDD and 70% VDD, unless otherwise noted.
Table A-7 Expansion Bus Timing
VDD = 5.0 Vdc ± 5%, VSS = 0 Vdc, TA = TL to TH
Num
Characteristic
Symbol
2.0 MHz
3.0 MHz
4.0 MHz
Unit
Min
Max
Min
Max
Min
Max
Frequency of Operation (E-Clock Frequency)
fo
dc
2.0
dc
3.0
dc
4.0
MHz
1
Cycle Time
tcyc = 1/fo
tcyc
500
333
250
ns
2
Pulse Width, E Low
PWEL = 1/2 tcyc – 20 ns
PWEL
230
147
105
ns
3
Pulse Width, E High
PWEH = 1/2 tcyc – 25 ns
(Note 2)
PWEH
225
142
100
ns
4A
4B
E Clock
Rise Time
Fall Time
tr
tf
20
20
18
20
15
ns
9
Address Hold Time
tAH = 1/8 tcyc – 10 ns
tAH
53—32—21—
ns
11
Address Delay Time
tAD = 1/8 tcyc + 40 ns
tAD
103
—82—71
ns
12
Address Valid Time to E Rise
tAV = PWEL – tAD
tAV
128
—65—34—
ns
17
Read Data Setup Time
tDSR
30—30—20—
ns
18
Read Data Hold Time
tDHR
0—0—0—
ns
19
Write Data Delay Time
tDDW
—40—40—40
ns
21
Write Data Hold Time
tDHW = 1/8 tcyc
tDHW
63—42—31—
ns
29
MPU Address Access Time
tACCA = tcyc – tf – tDSR – tAD
(Note 2)
tACCA
348
203
144
ns
39
Write Data Setup Time
tDSW = PWEH – tDDW
(Note 2)
tDSW
185
102
60
ns
50
E Valid Chip Select Delay Time
tECSD
—40—40—40
ns
51
E Valid Chip Select Access Time
tECSA = PWEH – tECSD – tDSR
(Note 2)
tECSA
155
—72—40—
ns
52
Chip Select Hold Time
tCH
020020020
ns
54
Address Valid Chip Select Delay Time
tACSD = 1/4 tcyc + 40 ns
tACSD
165
123
103
ns
55
Address Valid Chip Select Access Time
tACSA = tcyc – tf – tDSR – tACSD
(Note 2)
tACSA
285
162
113
ns
56
Address Valid to Chip Select Time
tAVCS
10—10—10—
ns
57
Address Valid to Data Three-State Time
tAVDZ
—10—10—10
ns
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