DS89C420-ENL MAXIM [Maxim Integrated Products], DS89C420-ENL Datasheet - Page 46

• Manufacturer Part Number: DS89C420-ENL
• Description: Ultra-High-Speed Microcontroller
• Manufacturer: MAXIM [Maxim Integrated Products]

ALE Pulse Width
Port 0 Instruction Address
Valid to ALE Low
Port 2 Instruction Address
Valid to ALE Low
Port 0 Data AddressValid
to ALE Low
Program Address Hold
After ALE Low
Address Hold After ALE
Low MOVX Write
Address Hold After ALE
Low MOVX Read
ALE Low to Valid
Instruction In
ALE Low to PSEN Low
Program Fetch
Instruction In
PSEN Pulse Width for
PSEN Low to Valid
System Clock
External Oscillator
External Crystal
Table 17. AC CHARACTERISTICS
PARAMETER
SYMBOL
1 / t
1 / t
t
t
t
t
t
t
t
t
t
t
t
AVLL2
AVLL3
LLAX2
LLAX3
AVLL
LLAX
LHLL
LLPL
PLPH
LLIV
PLIV
CLCL
CLCL
0.5t
0.5t
0.5t
0.5t
0.5t
t
+ t
+ t
+ t
CLCL
MIN
CLCL
CLCL
CLCL
CLCL
CLCL
PAGE MODE 1
0
1
STC3
STC4
STC4
- 5
1 CYCLE
- 2
- 4
- 8
- 8
- 8
t
CLCL
MAX
33
33
- 18
0.5t
1.5t
1.5t
1.5t
t
CLCL
t
+ t
+ t
CLCL
MIN
t
CLCL
CLCL
CLCL
CLCL
STC3
PAGE MODE 1
0
1
STC4
STC4
- 2 +
- 5
2 CYCLE
- 4
- 8
- 8
- 8
t
CLCL
MAX
33
33
- 18
46 of 58
2t
1.5t
2.5t
2.5t
2.5t
2t
CLCL
+ t
+ t
MIN
CLCL
t
CLCL
CLCL
CLCL
CLCL
STC3
PAGE MODE 1
0
1
STC4
STC4
- 4 +
- 5
4 CYCLE
- 5
- 8
- 8
- 8
2t
CLCL
MAX
33
33
- 18
(V
1.5t
0.5t
0.5t
0.5t
0.5t
1.5t
t
CLCL
t
t
CC
CLCL
CLCL
MIN
CLCL
CLCL
CLCL
t
t
t
t
CLCL
CLCL
CLCL
STC3
STC3
STC4
STC4
PAGE MODE 2
0
1
- 2 +
= 4.5V to 5.5V; T
- 2
- 5
- 5 +
- 8 +
- 8 +
- 2
- 8
- 6
2.5t
t
CLCL
MAX
CLCL
33
33
- 18
- 20
1.5t
0.5t
0.5t
0.5t
0.5t
0.5t
0.5t
2t
t
NON-PAGE MODE
CLCL
MIN
CLCL
CLCL
CLCL
CLCL
CLCL
t
t
t
t
CLCL
CLCL
CLCL
STC3
STC3
STC4
STC4
0
1
- 2
- 5 +
- 2 +
- 8 +
- 8 +
- 5
- 2
- 8
- 6
A
= -40°C to +85°C)*
2.5t
2t
CLCL
MAX
CLCL
33
33
- 18
- 20
UNITS
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
DS89C420
NOTES
1
2