at83c5122 ATMEL Corporation, at83c5122 Datasheet - Page 194

• Manufacturer Part Number: at83c5122
• Description: At83c5123 C51 Microcontroller With Usb And Smart Card Reader Interfaces
• Manufacturer: ATMEL Corporation

External Program Memory
Read Cycle
194
AT8xC5122/23
PORT 2
PORT 0
ALE
PSEN
INSTR IN
OR SFR-P2
ADDRESS
Table 115. AC Parameters for a Variable Clock
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
PLPH
LHLL
AVLL
LLAX
LLPL
PLAZ
PLIV
PXIX
PXIZ
AVIV
LLIV
LHLL
T
T
LLAX
AVLL
A0-A7
T
ADDRESS A8-A15
AVIV
T
LLIV
Type
T
Max
Max
Max
Max
Max
Min
Min
Min
Min
Min
Min
T
LLPL
TPLAZ
PLIV
T
PLPH
INSTR IN
T
PXIX
Standard
clock
2T - x
4T - x
3T - x
3T - x
5T - x
T - x
T - x
T - x
T - x
12 T
x
x
CLCL
T
PXIZ
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
T - x
A0-A7
PXAV
x
x
ADDRESS A8-A15
X parameter
15
20
20
35
15
25
45
15
45
10
0
INSTR IN
4202E–SCR–06/06
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns