TS80C52X2
10.4.2 External Program Memory Characteristics
Table 24. Symbol Description
Symbol
Parameter
T
Oscillator clock period
ALE pulse width
T
LHLL
T
Address Valid to ALE
AVLL
T
Address Hold After ALE
ALE to Valid Instruction In
ALE to PSEN
LLAX
T
LLIV
LLPL
PLPH
T
T
PSEN Pulse Width
T
PSEN to Valid Instruction In
Input Instruction Hold After PSEN
Input Instruction FloatAfter PSEN
PSEN to Address Valid
PLIV
PXIX
T
T
PXIZ
T
PXAV
T
Address to Valid Instruction In
PSEN Low to Address Float
AVIV
T
PLAZ
Table 25. AC Parameters for Fix Clock
Speed
-M
-V
-L
Units
(see ordering)
Symbol
Min
25
Max
Min
17
Max
Min
50
Max
T
ns
ns
T
40
25
60
LHLL
T
10
10
7
7
20
20
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
AVLL
T
LLAX
T
70
45
125
LLIV
LLPL
PLPH
T
T
10
60
7
20
45
105
T
25
18
25
12
60
30
PLIV
PXIX
T
0
0
0
T
PXIZ
T
18
12
30
PXAV
T
85
10
53
10
145
10
AVIV
T
PLAZ
44
Rev. B - Jan. 25, 1999
Preliminary
TEMIC [ TEMIC SEMICONDUCTORS ]
