參數(shù)資料
型號(hào): W78L058A
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 21/34頁
文件大?。?/td> 238K
代理商: W78L058A
W78LE58/W78L058A
Publication Release Date: December 4, 2006
- 21 -
Revision A6
9. AC CHARACTERISTICS
The AC specifications are a function of the particular process used to manufacture the part, the
ratings of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the
specifications can be expressed in terms of multiple input clock periods (T
CP
), and actual parts will
usually experience less than a
±
20 nS variation. The numbers below represent the performance
expected from a 0.6 micron CMOS process when using 2 and 4 mA output buffers.
Clock Input Waveform
T
T
XTAL1
F
CH
CL
OP,
T
CP
PARAMETER
Operating Speed
SYMBOL
F
OP
MIN.
0
TYP.
-
MAX.
20
UNIT
MHz
NOTES
1
Clock Period
TCP
50
-
-
nS
2
T
CH
Clock High
25
-
-
nS
3
T
CL
Clock Low
25
-
-
nS
3
Notes:
1. The clock may be stopped indefinitely in either state.
2. The T
CP
specification is used as a reference in other specifications.
3. There are no duty cycle requirements on the XTAL1 input.
Program Fetch Cycle
PARAMETER
SYMBOL
T
AAS
T
AAH
T
APL
MIN.
1 T
CP
-
Δ
1 T
CP
-
Δ
1 T
CP
-
Δ
-
TYP.
-
-
-
MAX.
-
-
-
UNIT
nS
nS
nS
NOTES
4
1, 4
4
Address Valid to ALE Low
Address Hold from ALE Low
ALE Low to
PSEN
Low
PSEN
Low to Data Valid
Data Hold after
PSEN
High
T
PDA
-
2 T
CP
nS
2
T
PDH
0
-
1 T
CP
nS
3
T
PDZ
0
-
1 T
CP
nS
Data Float after
PSEN
High
ALE Pulse Width
T
ALW
T
PSW
-
-
nS
nS
4
4
2 T
CP
3 T
CP
2 T
CP
-
Δ
3 T
CP
-
Δ
PSEN
Pulse Width
Notes:
1. P0.0
P0.7, P2.0
P2.7 remain stable throughout entire memory cycle.
2. Memory access time is 3 T
CP
.
3. Data have been latched internally prior to
4. "
Δ
" (due to buffer driving delay and wire loading) is 20 nS.
PSEN
going high.
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