參數資料
型號: 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
文件頁數: 44/58頁
文件大?。?/td> 634K
代理商: SAF-C515A-LM
Semiconductor Group
49
1997-10-01
C515A
AC Characteristics (18 MHz, cont’d)
External Data Memory Characteristics
External Clock Drive Characteristics
Parameter
Symbol
Limit Values
Unit
18 MHz
Clock
Variable Clock
1/
t
CLCL = 3.5 MHz to 18 MHz
min.
max.
min.
max.
RD pulse width
t
RLRH
233
6
t
CLCL – 100
ns
WR pulse width
t
WLWH
233
6
t
CLCL – 100
ns
Address hold after ALE
t
LLAX2
81
2
t
CLCL – 30
ns
RD to valid data in
t
RLDV
128
5
t
CLCL – 150
ns
Data hold after RD
t
RHDX
0
0–ns
Data float after RD
t
RHDZ
–51
2
t
CLCL – 60
ns
ALE to valid data in
t
LLDV
294
8
t
CLCL – 150
ns
Address to valid data in
t
AVDV
335
9
t
CLCL – 165
ns
ALE to WR or RD
t
LLWL
117
217
3
t
CLCL – 50
3
t
CLCL + 50
ns
Address valid to WR or RD
t
AVWL
92
4
t
CLCL – 130
ns
WR or RD high to ALE high
t
WHLH
16
96
t
CLCL – 40
t
CLCL + 40
ns
Data valid to WR transition
t
QVWX
11
t
CLCL – 45
ns
Data setup before WR
t
QVWH
239
7
t
CLCL – 150
ns
Data hold after WR
t
WHQX
16
t
CLCL – 40
ns
Address float after RD
t
RLAZ
0
–0ns
Parameter
Symbol
Limit Values
Unit
Variable Clock
Freq. = 3.5 MHz to 18 MHz
min.
max.
Oscillator period
t
CLCL
55.6
285.7
ns
High time
t
CHCX
15
t
CLCL tCLCX
ns
Low time
t
CLCX
15
t
CLCL tCHCX
ns
Rise time
t
CLCH
–15
ns
Fall time
t
CHCL
–15
ns
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