參數(shù)資料
型號： MC68HCP11A1CP2
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP48
封裝： PLASTIC, DIP-48
文件頁數(shù)： 45/158頁
文件大?。?/td> 3803K
代理商： MC68HCP11A1CP2
ELECTRICAL CHARACTERISTICS
MOTOROLA
TECHNICAL DATA
A-19
A
NOTES:
1. Formula only for dc to 2 MHz.
2. Input clocks with duty cycles other than 50% affect bus performance. Timing parameters affected by input clock
duty cycle are identified by (a) and (b). To recalculate the approximate bus timing values, substitute the following
expressions in place of 1/8 tcyc in the above formulas, where applicable:
(a) (1-DC) x 1/4 tcyc
(b) DC x 1/4 tcyc
Where:
DC is the decimal value of duty cycle percentage (high time).
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 ± 10%, VSS = 0 Vdc, TA = TL to TH
Num
Characteristic
Symbol
1.0 MHz
2.0 MHz
3.0 MHz
Unit
Min
Max
Min
Max
Min
Max
Frequency of Operation (E-Clock Frequency)
fo
dc
1.0
dc
2.0
dc
3.0
MHz
1
Cycle Time
tcyc
1000
—
500
—
333
—
ns
2
Pulse Width, E Low
PWEL = 1/2 tcyc – 23 ns(Note 1)
PWEL
477
—
227
—
146
—
ns
3
Pulse Width, E High
PWEH = 1/2 tcyc – 28 ns(Note 1)
PWEH
472
—
222
—
141
—
ns
4a, b
E and AS Rise and Fall Time
tr
tf
—20
20
—20
20
—20
15
ns
9
Address Hold Time
tAH = 1/8 tcyc – 29.5 ns (Note 1, 2a)
tAH
95.5
—
33
—
26
—
ns
12
Non-Muxed Address Valid Time to E Rise
tAV = PWEL – (tASD + 80 ns)(Note 1, 2a)
tAV
281.5
—
94
—
54
—
ns
17
Read Data Setup Time
tDSR
30—30—30—
ns
18
Read Data Hold Time (Max = tMAD)tDHR
0
145.5
0
83
0
51
ns
19
Write Data Delay Time
tDDW = 1/8 tcyc + 65.5 ns (Note 1, 2a)
tDDW
—
190.5
—
128
—
71
ns
21
Write Data Hold Time
tDHW = 1/8 tcyc – 29.5 ns(Note 1, 2a)
tDHW
95.5
—
33
—
26
—
ns
22
Muxed Address Valid Time to E Rise
tAVM = PWEL – (tASD + 90 ns)(Note 1, 2a)
tAVM
271.5
—
84
—
54
—
ns
24
Muxed Address Valid Time to AS Fall
tASL = PWASH – 70 ns(Note 1)
tASL
151
—26—13—
ns
25
Muxed Address Hold Time
tAHL = 1/8 tcyc – 29.5 ns(Note 1, 2b)
tAHL
95.5
—
33
—
31
—
ns
26
Delay Time, E to AS Rise
tASD = 1/8 tcyc – 9.5 ns (Note 1, 2a)
tASD
115.5
—
53
—
31
—
ns
27
Pulse Width, AS High
PWASH = 1/4 tcyc – 29 ns(Note 1)
PWASH
221
—96—63—
ns
28
Delay Time, AS to E Rise
tASED = 1/8 tcyc – 9.5 ns(Note 1, 2b)
tASED
115.5
—
53
—
31
—
ns
29
MPU Address Access Time(Note 2a)
tACCA = tcyc – (PWEL – tAVM) – tDSR – tf
tACCA
744.5
—
307
—
196
—
ns
35
MPU Access Time
tACCE = PWEH – tDSR
tACCE
—
442
—
192
—
111
ns
36
Muxed Address Delay
(Previous Cycle MPU Read)
tMAD = tASD + 30 ns(Note 1, 2a)
tMAD
145.5
—
83
—
51
—
ns
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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