Analog Devices MicroConverter ADuC812 User Manual page 47

Parameter
EXTERNAL PROGRAM MEMORY
t ALE Pulsewidth
LHLL
t Address Valid to ALE Low
AVLL
t Address Hold after ALE Low
LLAX
t ALE Low to Valid Instruction In
LLIV
ALE Low to PSEN Low
t
LLPL
PSEN Pulsewidth
t
PLPH
PSEN Low to Valid Instruction In
t
PLIV
Input Instruction Hold after PSEN
t
PXIX
Input Instruction Float after PSEN
t
PXIZ
t Address to Valid Instruction In
AVIV
PSEN Low to Address Float
t
PLAZ
Address Hold after PSEN High
t
PHAX
MCLK
ALE (O)
PSEN (O)
PORT 0 (I/O)
PORT 2 (O)
12 MHz
Min
127
43
53
53
205
0
0
t
LHLL
t t
AVLL LLPL
t
PLAZ
t
LLAX
PCL (OUT)
t
AVIV
PCH
Variable Clock
Max Min Max
2t – 40
CK
t – 40
CK
t – 30
CK
234 4t
t – 30
CK
3t – 45
CK
145 3t
0
59 t
312 5t
25 25
0
t
PLPH
t
LLIV
t
PLIV
t
PXIZ
t
PXIX
INSTRUCTION
(IN)
t
PHAX
ADuC812
Unit Figure
ns 52
ns 52
ns 52
– 100 ns 52
CK
ns 52
ns 52
– 105 ns 52
CK
ns 52
– 25 ns 52
CK
– 105 ns 52
CK
ns 52
ns 52