參數(shù)資料
型號: T8xC51SND1
廠商: Atmel Corp.
英文描述: Single Chip Microcontroller with MP3 Decoder and Man Machine Interface
中文描述: 單芯片微控制器,帶有MP3解碼器和人機界面
文件頁數(shù): 42/60頁
文件大?。?/td> 868K
代理商: T8XC51SND1
42
T8xC51SND1
Rev. D
15-Nov-01
12.5 AC Characteristics - External IDE 16-bit Bus Cycles
12.6.1 Definition of symbols
Table 47.
External IDE 16-bit Bus Cycles Timing Symbol Definitions
12.7.2 Timings
Test conditions: capacitive load on all pins= 50 pF.
Table 48.
External IDE 16-bit Bus Cycle - Data Read AC Timings
VDD= 2.7 to 3.3 V, TA= -40 to +85
°
C
Signals
Conditions
A
Address
H
High
D
Data In
L
Low
L
ALE
V
Valid
Q
Data Out
X
No Longer Valid
R
RD#
Z
Floating
W
WR#
Symbo
l
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
LLRL
ALE Low to RD# Low
3
·
T
CLCL
-30
1.5
·
T
CLCL
-30
ns
T
RLRH
RD# Pulse Width
6
·
T
CLCL
-25
3
·
T
CLCL
-25
ns
T
RHLH
RD# high to ALE High
T
CLCL
-20
T
CLCL
+20
0.5
·
T
CLCL
-20
0.5
·
T
CLCL
+20
ns
T
AVDV
Address Valid to Valid Data In
9
·
T
CLCL
-65
4.5
·
T
CLCL
-65
ns
T
AVRL
Address Valid to RD# Low
4
·
T
CLCL
-30
2
·
T
CLCL
-30
ns
T
RLDV
RD# Low to Valid Data
5
·
T
CLCL
-30
2.5
·
T
CLCL
-30
ns
T
RLAZ
RD# Low to Address Float
0
0
ns
T
RHDX
Data Hold After RD# High
0
0
ns
T
RHDZ
Instruction Float After RD#
High
2
·
T
CLCL
-25
T
CLCL
-25
ns
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