at89c51ac3-s3sim ATMEL Corporation, at89c51ac3-s3sim Datasheet - Page 126

• Manufacturer Part Number: at89c51ac3-s3sim
• Description: At89c51ac3 Enhanced 8-bit Microcontroller With 64kb Flash Memory
• Manufacturer: ATMEL Corporation

External Program Memory Read Cycle
126
AT89C51AC3
PORT 0
PORT 2
PSEN
ALE
INSTR IN
OR SFR-P2
ADDRESS
T
Table 75. AC Parameters for a Variable Clock
LHLL
T
T
LLAX
AVLL
A0-A7
Symbol
T
T
T
T
T
T
T
T
T
T
T
PLPH
PLAZ
LHLL
AVLL
LLAX
LLPL
PXIX
AVIV
LLIV
PLIV
PXIZ
T
AVIV
ADDRESS A8-A15
T
LLIV
T
LLPL
TPLAZ
T
PLIV
T
PLPH
Type
INSTR IN
Max
Max
Max
Max
Max
Min
Min
Min
Min
Min
Min
T
PXIX
12 T
CLCL
Standard
Clock
2 T - x
4 T - x
3 T - x
3 T - x
5 T - x
T
T - x
T - x
T - x
T - x
PXIZ
x
x
T
PXAV
A0-A7
X2 Clock
0.5 T - x
0.5 T - x
0.5 T - x
1.5 T - x
1.5 T - x
0.5 T - x
2.5 T - x
2 T - x
T - x
x
x
ADDRESS A8-A15
X parameter
INSTR IN
10
15
15
30
10
20
40
40
10
0
7
4383D–8051–02/08
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns