參數(shù)資料
型號: DOC4106
廠商: Atmel Corp.
英文描述: Single-Chip Microcontroller with MP3 Decoder and Man-Machine Interface
中文描述: 單片微控制器,帶有MP3解碼器和人機界面
文件頁數(shù): 30/47頁
文件大小: 791K
代理商: DOC4106
30
AT8xC51SND1C
4106F–8051–10/02
Table 41.
External 8-bit Bus Cycle – Data Write AC Timings
V
DD
= 2.7 to 3.3V, T
A
= -40
°
to +85
°
C
Waveforms
Figure 15.
External 8-bit Bus Cycle – Data Read Waveforms
Symbol
Parameter
Variable Clock
Standard Mode
Variable Clock
X2 Mode
Unit
Min
Max
Min
Max
T
CLCL
Clock Period
50
50
ns
T
LHLL
ALE Pulse Width
2·T
CLCL
-15
T
CLCL
-15
ns
T
AVLL
Address Valid to ALE Low
T
CLCL
-20
0.5·T
CLCL
-20
ns
T
LLAX
Address Hold after ALE
Low
T
CLCL
-20
0.5·T
CLCL
-20
ns
T
LLWL
ALE Low to WR Low
3·T
CLCL
-30
1.5·T
CLCL
-30
ns
T
WLWH
WR Pulse Width
6·T
CLCL
-25
3·T
CLCL
-25
ns
T
WHLH
WR High to ALE High
T
CLCL
-20
T
CLCL
+20
0.5·T
CLCL
-20
0.5·T
CLCL
+20
ns
T
AVWL
Address Valid to WR Low
4·T
CLCL
-30
2·T
CLCL
-30
ns
T
QVWH
Data Valid to WR High
7·T
CLCL
-20
3.5·T
CLCL
-20
ns
T
WHQX
Data Hold after WR High
T
CLCL
-15
0.5·T
CLCL
-15
ns
T
AVDV
T
LLAX
T
RHDX
T
RHDZ
T
AVLL
T
AVRL
P2
P0
RD
ALE
T
LHLL
T
RLRH
Data In
A15:8
T
RLAZ
T
LLRL
T
RHLH
T
RLDV
D7:0
A7:0
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