mt90823ap1 Zarlink Semiconductor, mt90823ap1 Datasheet - Page 36

• Manufacturer Part Number: mt90823ap1
• Description: 2048 X 2048 Channels Selectable Rate 2, 4, 8 Mbps 3.3 V Non-blocking Large Digital Switch Ldx
• Manufacturer: Zarlink Semiconductor

AC Electrical Characteristics - Multiplexed Bus Timing (Mode 1)
1. High Impedance is measured by pulling to the appropriate rail with R
10 WR pulse width (fast write)
11 WR delay after ALE falling
12 CS setup from WR
13 Data setup from WR (fast write)
14 Valid Data Delay on write (slow write)
15 Data hold after WR inactive
16 Acknowledgment Delay:
17 Acknowledgment Hold Time
Note:
1
2
3
4
5
6
7
8
9
ALE pulse width
Address setup from ALE falling
Address hold from ALE falling
RD active after ALE falling
Data setup from DTA Low on Read
CS hold after RD/WR
RD pulse width (fast read)
CS setup from RD
Data hold after RD
Reading/Writing Registers
Reading/Writing Memory @ 2Mb/s
Characteristics
@ 4Mb/s
@ 8Mb/s
t
t
Sym.
t
t
CSRW
t
t
t
Zarlink Semiconductor Inc.
t
t
t
t
t
ALWR
t
ALRD
t
t
t
t
CSW
DSW
SWD
DHW
DDR
DHR
ALW
ADS
ADH
CSR
AKD
AKH
WW
RW
MT90823
36
Min.
20
45
10
45
20
L
3
3
3
5
5
0
3
0
5
, with timing corrected to cancel time taken to discharge C
Typ.
760/750
400/390
220/210
43/43
Max.
122
20
22
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
C
C
Note 1.
C
C
C
C
C
Note 1.
Test Conditions
L
L
L
L
L
L
L
=150pF
=150pF, R
=150pF
=150pF
=150pF
=150pF
=150pF, R
Data Sheet
L
.
L
L
=1K,
=1K,