w78l365a Winbond Electronics Corp America, w78l365a Datasheet - Page 29

• Manufacturer Part Number: w78l365a
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

8.
8.1
Notes:
Address Valid to ALE Low
Address Hold from ALE Low
ALE Low to PSEN Low
PSEN Low to Data Valid
Data Hold after PSEN High
Data Float after PSEN High
ALE Pulse Width
PSEN 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. " ∆ " (due to buffer driving delay and wire loading) is 20 nS.
TIMING WAVEFORMS
Program Fetch Cycle
PARAMETER
PORT 2
PORT 0
PSEN
XTAL1
ALE
Code
S1
T
CP
AAH
.
A0-A7
S2
T
AAS
T
T
PDA
S3
APL
T
SYMBOL
PSW
T
Data
T
T
T
T
T
T
T
PSW
AAH
PDA
PDH
ALW
AAS
PDZ
APL
S4
A0-A7
T
S5
PDH,
T
- 29 -
ALW
1 T
1 T
1 T
2 T
3 T
T
PDZ
S6
MIN.
CP
CP
CP
CP
CP
0
0
-
Code
-∆
-∆
-∆
-∆
-∆
S1
W78LE365/W78L365A
A0-A7
S2
2 T
3 T
TYP.
Publication Release Date: April 28, 2008
-
-
-
-
-
-
CP
CP
S3
Data
2 T
1 T
1 T
MAX.
S4
-
-
-
-
-
CP
CP
CP
A0-A7
S5
UNIT
S6
nS
nS
nS
nS
nS
nS
nS
nS
Revision A8
NOTES
1, 4
4
4
2
3
4
4