imp8980d A1 PROs co., Ltd., imp8980d Datasheet - Page 11

• Manufacturer Part Number: imp8980d
• Description: Pcm Digital Switch
• Manufacturer: A1 PROs co., Ltd.

Figure 17 Processor Bus
† Timing is over recommended temperature & power supply voltages.
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
* High Impedance is measured by pulling to the appropriate rail with R L, with timing corrected to cancel time taken to discharge C L.
➀ Processor accesses are dependent on the C4i clock, and so some timings are expressed as multiples of the C4i clock period.
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11
12
13
AC Electrical Characteristics † - Processor Bus (Figures 11 and 17)
CS
R/W
DTA
DS
D7
to
D0
A5
to
A0
1
2
3
4
5
6
7
8
9
Characteristics
Chip Select Setup Time
Read/Write Setup Time
Address Setup Time
A
Fast Write Data Setup Time
Slow Write Data Delay
Read Data Setup Time
Data Hold Time Read
Read Data To High Imp. t
Chip Select Hold Time
Read/Write Hold Time
Address Hold Time
Acknow. Hold Time
Delay
cknowledgement
2.0V
0.8V
2.0V
0.8V
0.8V (Read) 0.8V (Write)
2.0V
0.8V
2.0V
0.8V
2.4V
0.4V
2.4V (Read) 2.0V (Write)
t
t
CSS
t
ADS
RWS
Write
Slow
Fast
Sym
t
t
t
t
t
t
t
t
t
t
t
t
t
t
SWD
AKD
AKD
RDS
CSS
RWS
DHT
RDZ
t
FWS
RWH
ADS
DHT
CSH
ADH
AKH
SWD
Min
2.7
20
20
20
25
25
40
20
10
0
0
0
t
RDS
t
Typ ‡ Max
AKD
2.0
10
50
60
0
5
5
100
7.2
1.7
0.5
90
80
t
FWS
cycles
Units
cycles
cycles
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Test Conditions
C
C4i cycles ➀
C4i cycles ➀
C4i cycles ➀, C
R
R
R
L
L
L
L
=150 pF
=1 KΩ * , C
=1 KΩ * , C
=1 KΩ * , C
t
t
DHT
AKH
t
RDZ
t
t
L
L
L
t
RWH
CSH
ADH
=150 pF
=150 pF
=150 pF
L
= 150 pF
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