參數(shù)資料
型號: W78C52C
廠商: WINBOND ELECTRONICS CORP
英文描述: 8-BIT Microcontroller(8位的微控制器)
中文描述: 8位微控制器(8位的微控制器)
文件頁數(shù): 9/16頁
文件大?。?/td> 239K
代理商: W78C52C
W78C52C
Publication Release Date: October 1997
- 9 -
Revision A3
Data Read Cycle
PARAMETER
SYMBOL
T
DAR
MIN.
3 T
CP
-
-
TYP.
-
MAX.
3 T
CP+
4 T
CP
UNIT
nS
NOTES
1, 2
ALE Low to RD Low
RD Low to Data Valid
T
DDA
-
nS
1
Data Hold from RD High
T
DDH
0
-
2 T
CP
nS
Data Float from RD High
T
DDZ
0
-
2 T
CP
nS
RD Pulse Width
T
DRD
6 T
CP
-
6 T
CP
-
nS
2
Notes:
1. Data memory access time is 8 T
CP
.
2. "
" (due to buffer driving delay and wire loading) is 20 nS.
Data Write Cycle
ITEM
SYMBOL
T
DAW
MIN.
3 T
CP
-
1 T
CP
-
1 T
CP
-
6 T
CP
-
TYP.
-
MAX.
3 T
CP
+
-
UNIT
nS
ALE Low to WR Low
Data Valid to WR Low
T
DAD
-
nS
Data Hold from WR High
T
DWD
-
-
nS
WR Pulse Width
T
DWR
6 T
CP
-
nS
Note: "
" (due to buffer driving delay and wire loading) is 20 nS.
Port Access Cycle
PARAMETER
SYMBOL
T
PDS
T
PDH
T
PDA
MIN.
1 T
CP
0
1 T
CP
TYP.
-
-
-
MAX.
-
-
-
UNIT
nS
nS
nS
Port Input Setup to ALE Low
Port Input Hold from ALE Low
Port Output to ALE
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.
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