w78c032c Winbond Electronics Corp America, w78c032c Datasheet - Page 10

• Manufacturer Part Number: w78c032c
• Description: 8-bit Mcu Series 80c51-based
• Manufacturer: Winbond Electronics Corp America

6.3.2
Notes:
6.3.3
Notes:
Address Valid to ALE Low
Address Hold after ALE Low
ALE Low to PSEN Low
Data Hold after PSEN High
Data Float after PSEN High
ALE Pulse Width
ALE Low to RD Low
Data Hold after RD High
Data Float after RD High
PSEN Low to Data Valid
PSEN
RD Low to Data Valid
RD Pulse Width
1. P0.0−P0.7, P2.0−P2.7 remain stable throughout entire memory cycle.
2. Memory access time is 3 T
3. Data have been latched internally prior to PSEN going high.
4. "Δ " ( due to buffer driving delay and wire loading) is 20 nS.
1. Data memory access time is 8 T
2. " Δ " (due to buffer driving delay and wire loading) is 20 nS.
Program Fetch Cycle
Data Read Cycle
Pulse Width
PARAMETER
PARAMETER
CP
.
CP
.
SYMBOL
SYMBOL
T
T
T
T
T
T
T
T
T
T
T
T
T
PSW
PDH
ALW
AAS
AAH
PDA
PDZ
DAR
DDA
DDH
DRD
APL
DDZ
- 10 -
1 T
1 T
1 T
2 T
3 T
3 T
6 T
MIN.
MIN.
CP
CP
CP
0
0
CP
CP
CP
0
0
CP
-
-
-Δ
-Δ
-Δ
-Δ
-Δ
-Δ
-Δ
6 T
2 T
3 T
TYP.
W78C32C/W78C032C
TYP.
-
-
-
-
-
-
-
-
-
-
CP
CP
CP
3 T
2 T
1 T
1 T
4 T
2 T
2 T
MAX.
MAX.
CP+
-
-
-
-
-
-
CP
CP
CP
CP
CP
CP
Δ
UNIT
UNIT
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
NOTES
NOTES
1, 4
1, 2
4
4
2
3
4
4
1
2