DS89C420 Dallas Semiconducotr, DS89C420 Datasheet - Page 48

• Manufacturer Part Number: DS89C420
• Description: Ultra-High-Speed Microcontroller
• Manufacturer: Dallas Semiconducotr

Port 2 Address to Valid
Data In
ALE Low to RD or WR
Low
Port 0 Address Valid to
Port 2 Address Valid to
Data Out Valid to WR
Transition
Data
High
*Specifications to -40°C are guaranteed by design and not production tested.
RD or WR Low
RD or WR Low
RD or WR High to ALE
Hold
PARAMETER
After WR
SYMBOL
(t
(
t
(
t
(
t
t
t
t
t
t
AVDV2
t
AVWL0)
t
AVRL0
AVRL2
AVWL2)
QVWX
WHQX
LLWL)
WHLH)
LLRL
RHLH
0 + t
0.5t
t
+ t
STC2
MIN
CLCL
STC5
20
PAGE MODE 1
-5
STC2
- 2
1 CYCLE
- 8
- 5
t
0.5t
CLCL
t
STC2
+ t
MAX
t
CLCL
STC1
STC2
- 16 +
+ 6
+ 1
2t
0.5t
t
CLCL
+ t
STC2
MIN
t
CLCL
STC2
20
PAGE MODE 1
-5
STC5
- 8 +
- 2
2 CYCLE
- 5
1.5t
2t
t
CLCL
STC2
+ t
MAX
CLCL
t
STC2
STC1
+ 8 +
+ 6
- 16
48 of 59
4t
1.5t
t
CLCL
+ t
STC2
MIN
t
CLCL
STC2
20
PAGE MODE 1
-5
STC5
- 8 +
- 2
4 CYCLE
- 5
3.5t
4t
t
CLCL
STC2
+ t
MAX
CLCL
t
STC2
STC1
+ 8 +
+ 6
- 16
0.5t
1.5t
t
CLCL
t
STC2
CLCL
CLCL
MIN
t
t
t
STC2
STC2
STC5
20
PAGE MODE 2
-5
- 5 +
- 2
- 8 +
- 5 +
3.0t
0.5t
t
STC2
+ t
+ t
MAX
CLCL
CLCL
STC1
STC2
+ 6
- 16
+ 4
0.5t
1.5t
t
CLCL
t
NON-PAGE MODE
STC2
CLCL
CLCL
MIN
t
t
t
STC2
STC2
STC5
20
-5
- 5 +
- 2
- 8 +
- 5 +
3.5t
0.5t
t
STC2
+ t
+ t
MAX
CLCL
CLCL
STC1
STC2
+ 6
- 20
+ 4
UNITS
ns
ns
ns
ns
ns
ns
ns
DS89C420
NOTES
2
2
2
2
1
1
1