W78E58B Winbond, W78E58B Datasheet - Page 21

• Manufacturer Part Number: W78E58B
• Description: 8 BIT MICROCONTROLLER
• Manufacturer: Winbond

Data Read Cycle
Notes:
1. Data memory access time is 8 T
2. " " (due to buffer driving delay and wire loading) is 20 nS.
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
ALE Low to RD Low
Data Hold from RD High
Data Float from RD High
ALE Low to WR Low
Data Valid to WR Low
Data Hold from WR High
RD Low to Data Valid
RD Pulse Width
WR Pulse Width
Port Input Setup to ALE Low
Port Input Hold from ALE Low
Port Output to ALE
ALE, since it provides a convenient reference.
PARAMETER
PARAMETER
PARAMETER
CP
.
SYMBOL
SYMBOL
SYMBOL
T
T
T
T
T
T
T
T
T
T
T
T
DAW
DWD
DWR
DAD
DAR
DDA
DDH
DRD
DDZ
PDH
PDS
PDA
- 21 -
3 T
6 T
3 T
1 T
1 T
6 T
1 TCP
1 TCP
MIN.
MIN.
MIN.
CP
0
0
CP
CP
CP
CP
CP
0
-
-
-
-
-
-
-
6 T
6 T
TYP.
TYP.
TYP.
Publication Release Date: March 18, 2002
-
-
-
-
-
-
-
-
-
-
CP
CP
3 T
3 T
4 T
2 T
2 T
MAX.
MAX.
MAX.
CP
CP+
-
-
-
-
-
-
-
CP
CP
CP
+
UNIT
UNIT
UNIT
W78E58B
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
Revision A3
NOTES
1, 2
1
2