參數(shù)資料
型號(hào): SAF-C515A-LM
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, 18 MHz, MICROCONTROLLER, PQFP80
封裝: METRIC, PLASTIC, QFP-80
文件頁(yè)數(shù): 47/58頁(yè)
文件大?。?/td> 634K
代理商: SAF-C515A-LM
Semiconductor Group
51
1997-10-01
C515A
AC Characteristics (24 MHz, cont’d)
External Data Memory Characteristics
External Clock Drive Characteristics
Parameter
Symbol
Limit Values
Unit
24 MHz
Clock
Variable Clock
1/
t
CLCL = 3.5 MHz to 24 MHz
min.
max.
min.
max.
RD pulse width
t
RLRH
180
6
t
CLCL – 70
ns
WR pulse width
t
WLWH
180
6
t
CLCL – 70
ns
Address hold after ALE
t
LLAX2
56
2 t
CLCL – 27
ns
RD to valid data in
t
RLDV
118
5
t
CLCL – 90
ns
Data hold after RD
t
RHDX
0
0–ns
Data float after RD
t
RHDZ
–63
2
t
CLCL – 20
ns
ALE to valid data in
t
LLDV
200
8
t
CLCL – 133
ns
Address to valid data in
t
AVDV
220
9
t
CLCL – 155
ns
ALE to WR or RD
t
LLWL
75
175
3
t
CLCL – 50
3
t
CLCL + 50
ns
Address valid to WR or RD
t
AVWL
67
4
t
CLCL – 97
ns
WR or RD high to ALE high
t
WHLH
17
67
t
CLCL – 25
t
CLCL + 25
ns
Data valid to WR transition
t
QVWX
5–
t
CLCL – 37
ns
Data setup before WR
t
QVWH
170
7
t
CLCL – 122
ns
Data hold after WR
t
WHQX
15
t
CLCL – 27
ns
Address float after RD
t
RLAZ
0
–0ns
Parameter
Symbol
Limit Values
Unit
Variable Clock
Freq. = 3.5 MHz to 24 MHz
min.
max.
Oscillator period
t
CLCL
41.7
285.7
ns
High time
t
CHCX
12
t
CLCL tCLCX
ns
Low time
t
CLCX
12
t
CLCL tCHCX
ns
Rise time
t
CLCH
–12
ns
Fall time
t
CHCL
–12
ns
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