W78E51B-40 WINBOND [Winbond], W78E51B-40 Datasheet - Page 15

• Manufacturer Part Number: W78E51B-40
• Description: 8-BIT MTP MICROCONTROLLER
• Manufacturer: WINBOND [Winbond]

Data Write Cycle
Note: " " (due to buffer driving delay and wire loading) is 20 nS.
Port Access Cycle
Note: Ports are read during S5P2, and output data becomes available at the end of S6P2. The timing data are referenced to
Program Operation
Note: Flash data can be accessed only in flash mode. The RST pin must pull in V
ALE Low to WR Low
Data Valid to WR Low
Data Hold from WR High
WR Pulse Width
Port Input Setup to ALE Low
Port Input Hold from ALE Low
Port Output to ALE
V
Data Setup Time
Data Hold Time
Address Setup Time
Address Hold Time
Program Operation
OECTRL Setup Time
OECTRL Hold Time
Data Valid from OE
CE Program Pulse Width for
OE Setup Time
OE High to Output Float
PP
ALE, since it provides a convenient reference.
the PSEN pin must pull in V
Setup Time
PARAMETER
PARAMETER
PARAMETER
IH
status.
SYMBOL
T
T
T
T
DWD
DWR
DAW
DAD
SYMBOL
SYMBOL
T
T
T
T
T
T
T
T
T
T
T
T
T
T
PWP
OCS
OCH
PDS
PDH
PDA
VPS
OES
DFP
OEV
DH
DS
AS
AH
- 15 -
3 T
1 T
1 T
6 T
MIN.
CP
CP
CP
CP
1 T
1 T
MIN.
MIN.
290
2.0
2.0
2.0
2.0
2.0
2.0
2.0
-
-
-
-
0
0
0
-
CP
CP
6 T
Preliminary W78E51B
TYP.
Publication Release Date: December 1998
IH
-
-
-
status, the ALE pin must pull in V
CP
TYP.
TYP.
300
-
-
-
-
-
-
-
-
-
-
-
-
-
3 T
MAX.
MAX.
CP
MAX.
-
-
-
310
130
150
-
-
-
-
-
-
-
-
-
-
-
+
UNIT
UNIT
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
nS
S
S
S
S
S
S
S
S
S
Revision A1
IL
status, and