參數(shù)資料
型號: W78E52C
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): 15/22頁
文件大?。?/td> 305K
代理商: W78E52C
W78E52C/W78E052C
Publication Release Date: November 6, 2006
- 15 -
Revision A4
Port Access Cycle
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
Port Input Setup to ALE Low
T
PDS
1 T
CP
-
-
nS
Port Input Hold from ALE Low
T
PDH
0
-
-
nS
Port Output to ALE
T
PDA
1 T
CP
-
-
nS
Note:
Ports are read during S5P2, and output data becomes available at the end of S6P2. The timing data are referenced to
ALE, since it provides a convenient reference.
Program Operation
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
V
PP
Setup Time
T
VPS
2.0
-
-
μ
S
Data Setup Time
T
DS
2.0
-
-
μ
S
Data Hold Time
T
DH
2.0
-
-
μ
S
Address Setup Time
T
AS
2.0
-
-
μ
S
Address Hold Time
T
AH
0
-
-
μ
S
CE
Program Operation
Program
Pulse
Width
for
T
PWP
290
300
310
μ
S
OECTRL Setup Time
T
OCS
2.0
-
-
μ
S
OECTRL Hold Time
T
OCH
2.0
-
-
μ
S
OE
Setup Time
T
OES
2.0
-
-
μ
S
OE
High to Output Float
T
DFP
0
-
130
nS
Data Valid from
OE
T
OEV
-
-
150
nS
Note:
Flash data can be accessed only in flash mode. The RST pin must pull in V
IH
status, the ALE pin must pull in V
IL
status,
and the PSEN pin must pull in V
IH
status.
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