DS2251T_06 DALLAS [Dallas Semiconductor], DS2251T_06 Datasheet - Page 11

• Manufacturer Part Number: DS2251T_06
• Description: 128k Soft Microcontroller Module
• Manufacturer: DALLAS [Dallas Semiconductor]

AC CHARACTERISTICS—EXPANDED BUS MODE TIMING SPECIFICATIONS
(continued)
(V
EXPANDED PROGRAM MEMORY READ CYCLE
19
20
21
22
23
24
25
26
27
#
CC
= 5V ±10%, T
PARAMETER
ALE Low to Valid Data In
Valid Address to Valid Data
In
ALE Low to
Address Valid to
Data Valid to
Data Valid to
Data Valid after
RD
RD
Low to Address Float
or
WR
High to ALE High
RD
WR
WR
WR
A
or
RD
Going Low
High
= 0˚C to +70˚C.)
WR
High
or
WR
Low
Low
At 12MHz
At 16MHz
At 12MHz
At 16MHz
At 12MHz
At 16MHz
SYMBOL
11 of 22
t
t
t
t
t
t
t
t
RDHALH
ALLRDL
t
DVWRH
WRHDV
DVWRL
MIN
AVRDL
ALLVD
RDLAZ
AVDV
7t
4t
7t
3t
t
t
t
CLK
CLK
CLK
CLK
CLK
MAX
CLK
CLK
- 60
- 150
- 50
- 40
-130
- 90
-50
9t
9t
8
3t
8t
t
CLK
UNITS
CLK
CLK
CLK
CLK
CLK
0
- 150
+ 50
- 165
- 105
+ 50
- 90
ns
ns
ns
ns
ns
ns
ns
ns
ns