Datasheet

165
4337K–USB–04/08
AT89C5130A/31A-M
27.4.2 External Program Memory Characteristics
Table 27-2. Symbol Description
Table 27-3. AC Parameters for a Fix Clock (F = 40 MHz)
Symbol Parameter
T Oscillator Clock Period
T
LHLL
ALE Pulse Width
T
AVLL
Address Valid to ALE
T
LLAX
Address Hold after ALE
T
LLIV
ALE to Valid Instruction In
T
LLPL
ALE to PSEN
T
PLPH
PSEN Pulse Width
T
PLIV
PSEN to Valid Instruction In
T
PXIX
Input Instruction Hold after PSEN
T
PXIZ
Input Instruction Float after PSEN
T
AVIV
Address to Valid Instruction In
T
PLAZ
PSEN Low to Address Float
Symbol Min Max Units
T 25 ns
T
LHLL
40 ns
T
AVLL
10 ns
T
LLAX
10 ns
T
LLIV
70 ns
T
LLPL
15 ns
T
PLPH
55 ns
T
PLIV
35 ns
T
PXIX
0 ns
T
PXIZ
18 ns
T
AVIV
85 ns
T
PLAZ
10 ns