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參數(shù)資料
型號： MC68711E20VFNE2
廠商： Freescale Semiconductor
文件頁數(shù)： 19/138頁
文件大?。?/td> 0K
描述： IC MCU 8BIT 52-PLCC
標準包裝： 23
系列： HC11
核心處理器： HC11
芯體尺寸： 8-位
速度： 4MHz
連通性： SCI，SPI
外圍設(shè)備： POR，WDT
輸入/輸出數(shù)： 38
程序存儲器容量： 20KB（20K x 8）
程序存儲器類型： OTP
EEPROM 大?。?/td> 512 x 8
RAM 容量： 768 x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x8b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 105°C
封裝/外殼： 52-LCC（J 形引線）
包裝： 管件
Expansion Bus Timing
MC68HC711D3 Data Sheet, Rev. 2.1
Freescale Semiconductor
115
9.8 Expansion Bus Timing
Num
Characteristic(1)
1. VDD = 5.0 Vdc ± 10%, VSS = 0 Vdc, TA = TL to TH. All timing is shown with respect to 20% VDD and 70% VDD, unless
otherwise noted.
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
PWEL
477
—
227
—
146
—
ns
3
Pulse width, E high, PWEH = 1/2 tcyc – 28 ns
PWEH
472
—
222
—
141
—
ns
4A
E and AS rise time
tr
—20
—
20
—
20
ns
4B
E and AS fall time
tf
—20
—
20
—
15
ns
9
Address hold time(2)a, tAH = 1/8 tcyc – 29.5 ns
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)
× 1/4 tCYC
(b) dc
× 1/4 tCYC
Where:
DC is the decimal value of duty cycle percentage (high time).
tAH
95.5
—
33
—
26
—
ns
12
Non-muxed address valid time to E rise
tAV = PWEL – (tASD + 80 ns)
(2)a
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
(2)a
tDDW
—
190.5
—
128
—
71
ns
21
Write data hold time, tDHW = 1/8 tcyc – 29.5 ns
(2)a
tDHW
95.5
—
33
—
26
—
ns
22
Muxed address valid time to E rise
tAVM = PWEL – (tASD + 90 ns)
(2)a
tAVM
271.5
—
84
—
54
—
ns
24
Muxed address valid time to AS fall
tASL = PWASH – 70 ns
tASL
151
—
26
—
13
—
ns
25
Muxed address hold time, tAHL = 1/8 tcyc – 29.5 ns
(2)b
tAHL
95.5
—
33
—
31
—
ns
26
Delay time, E to AS rise, tASD = 1/8 tcyc – 9.5 ns
(2)a
tASD
115.5
—
53
—
31
—
ns
27
Pulse width, AS high, PWASH = 1/4 tcyc – 29 ns
PWASH
221
—
96
—
63
—
ns
28
Delay time, AS to E rise, tASED = 1/8 tcyc – 9.5 ns
(2)b
tASED
115.5
—
53
—
31
—
ns
29
MPU address access time(2)a
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
(2)a(3)
3. Formula only for dc to 2 MHz.
tMAD
145.5
—
83
—
51
—
ns
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