MT9079 Mitel Semiconductor, MT9079 Datasheet - Page 46

• Manufacturer Part Number: MT9079
• Description: CMOS ST-BUS FAMILY Advanced Controller for E1
• Manufacturer: Mitel Semiconductor

MT9079
AC Electrical Characteristics
Notes:
1. High impedance is measured by pulling to the appropriate rail with R
2. Outputs are compatible with both CMOS and TTL logic levels.
3. DS and CS may be connected together.
4. t
4-282
DS
CS
R/W
A0-A4
D0-D7
READ
D0-D7
WRITE
10
12
11
(V
1
2
3
4
5
6
7
8
9
DAZ
CT
=0.5V
is measured with respect to the raising edge of DS or CS, whichever occurs first.
DS low
DS High
CS Setup
R/W Setup
Address Setup
CS Hold
R/W Hold
Address Hold
Data Delay Read
Data Active to High Z Delay
Data Setup Write
Data Hold Write
DD
) and TTL (V
Characteristics
TT
=1.5V) references and the worst case value is specified.
t
DSH
Figure 17 - Microprocessor Timing Diagram
-
Microprocessor Timing
t
t
CSS
t
RWS
ADS
Sym
t
t
t
t
t
t
t
t
t
t
t
t
RWH
DSW
DHW
RWS
DSH
CSS
ADS
CSH
ADH
DDR
DAZ
DSL
t
DDR
Min
70
50
25
0
5
5
0
0
0
5
L
. Timing is corrected to cancel time taken to discharge C
Timing parameters are measured with respect to both CMOS
Typ
t
DSL
VALID DATA
VALID DATA
t
DSW
Max
120
50
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
DHW
See Note 3
See Note 3
C
See Note 2
C
See Notes 1, 2 & 4
t
t
t
t
CSH
RWH
ADH
DAZ
L
L
=150pF, R
=150pF, R
Conditions/Notes
L
L
=1k
=1k
V
V
V
V
V
V
L
.
TT
TT
TT
TT
TT,
TT
V
CT