Rainbow Electronics DS89C450 - Manual (Page 6)

DS89C430/DS89C440/DS89C450 Ultra-High-Speed Flash Microcontrollers
6 of 48
AC CHARACTERISTICS (continued)
(V
CC
= 4.5V to 5.5V, T
O
= -40°C to +85°C.) (See Figure 1 , Figure 2 , and Figure 3 .)
1-CYCLE
PAGE MODE 1
2-CYCLE
PAGE MODE 1
4-CYCLE
PAGE MODE 1
PAGE MODE 2 NONPAGE MODE
PARAMETER SYMBOL
MIN MAX MIN MAX MIN MAX MIN MAX MIN MAX
UNITS
Port 0 Address to Valid Data
In (Note 16)
t
AVDV0
3t
CLCL
- 20
+ t
STC1
3t
CLCL
- 20
+ t
STC1
ns
Port 2 Address to Valid Data
In (Note 16)
t
AVDV2
t
CLCL
- 20
+ t
STC1
1.5t
CLCL
-
20 + t
STC1
3.5t
CLCL
-
20 + t
STC1
3.0t
CLCL
- 20
+ t
STC1
3.5t
CLCL
-
20 + t
STC1
ns
ALE Low to RD or WR Low
(Note 16)
t
LLRL
(
t
LLWL)
0.5t
CLCL
- 8 +
t
STC2
0.5t
CLCL
+
6 + t
STC2
2t
CLCL
- 8
+ t
STC2
2t
CLCL
+ 6
+ t
STC2
4t
CLCL
- 8
+ t
STC2
4t
CLCL
+ 6 +
t
STC2
0.5t
CLCL
- 8
+ t
STC2
0.5t
CLCL
+ 4
+ t
STC2
0.5t
CLCL
- 8
+ t
STC2
0.5t
CLCL
+ 5
+ t
STC2
ns
Port 0 Address Valid to RD or
WR Low (Note 16)
t
AVRL0
(
t
AVWL0)
1.5t
CLCL
- 5
+ t
STC2
t
CLCL
- 5 +
t
STC2
ns
Port 2 Address Valid to RD or
WR Low (Note 16)
t
AVRL2
(t
AVWL2)
0 + t
STC5
- 5
0.5t
CLCL
- 5
+ t
STC5
1.5t
CLCL
- 5
+ t
STC5
t
CLCL
- 5 +
t
STC5
1.5t
CLCL
- 5
+ t
STC5
ns
Data Out Valid to WR
Transition (Note 15)
t
QVWX
-5 -5 -5 -5 -5 ns
Data Hold After WR
(Note 15)
t
WHQX
t
CLCL
+ t
STC2
- 10
t
CLCL
+ t
STC2
- 10
t
CLCL
+ t
STC2
- 10
t
CLCL
+ t
STC2
- 10
t
CLCL
+ t
STC2
- 10
ns
RD or WR High to ALE High
(Note 15) t
RHLH
(
t
WHLH)
t
STC2
- 2 t
STC2
+ 4 t
STC2
- 2 t
STC2
+ 4 t
STC2
- 2 t
STC2
+ 4 t
STC2
- 2 t
STC2
+ 4 t
STC2
- 2 t
STC2
+ 4
ns
Note: Specifications to -40°C are guaranteed by design and are not production tested. AC electrical characteristics assume 50% duty cycle for the oscillator and are not 100% tested, but are
guaranteed by design.