zl50021 Zarlink Semiconductor, zl50021 Datasheet - Page 111

• Manufacturer Part Number: zl50021
• Description: Enhanced 4 K Digital Switch With Stratum 3 Dpll
• Manufacturer: Zarlink Semiconductor

† Characteristics are over recommended operating conditions unless otherwise stated.
AC Electrical Characteristics
Note 1:
Note 2:
27 CS de-asserted time
28 RD setup to CS falling
29 WR setup to CS falling
30 Address setup to CS falling
31 RD hold after CS rising
32 WR hold after CS rising
33 Address hold after CS rising
34 Data setup to RDY high
35
36 Acknowledgement delay time.
37 Acknowledgement hold time.
38 RDY drive low to HiZ
CS
RD
WR
A0-A13
D0-D15
RDY
Data hold after CS rising
From CS low to RDY high:
From CS high to RDY low
Registers
Memory
High impedance is measured by pulling to the appropriate rail with R
A delay of 500
discharge C
performed after the RESET pin is set high.
Characteristics
L
.
µ
s to 2ms (see Section 17.2 on page 49) must be applied before the first microprocessor access is
Figure 28 - Intel Non-Multiplexed Bus Timing - Read Access
†
- Intel Non-Multiplexed Bus Mode - Read Access
t
CSD
Sym.
t
t
t
t
t
t
t
Zarlink Semiconductor Inc.
CSD
t
t
t
t
t
AKD
AKH
AKZ
WS
WH
RH
DH
RS
AS
AH
DS
t
t
t
RS
AS
WS
ZL50021
Min.
111
15
10
10
5
0
0
0
8
7
4
Typ.
VALID ADDRESS
t
AKD
L
, with timing corrected to cancel time taken to
t
DS
Max.
175
185
VALID READ DATA
12
8
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
t
AH
AKH
t
DH
C
C
(Note 1)
C
C
C
(Note 1)
t
t
RH
WH
L
L
L
L
L
Test Conditions
= 50 pF
= 50 pF, R
= 50 pF
= 50 pF
= 50 pF, R
t
AKZ
Data Sheet
V
V
V
V
L
L
V
V
CT
CT
CT
CT
= 1 K
= 1 K
CT
CT
2