參數(shù)資料
型號: ZL50019GAC
廠商: ZARLINK SEMICONDUCTOR INC
元件分類: 路由/交換
英文描述: Enhanced 2 K Digital Switch with Stratum 4E DPLL
中文描述: TELECOM, DIGITAL TIME SWITCH, PBGA256
封裝: 17 X 17 MM, 1.61 MM HEIGHT, PLASTIC, MS-034, BGA-256
文件頁數(shù): 91/115頁
文件大?。?/td> 866K
代理商: ZL50019GAC
ZL50019
Data Sheet
91
Zarlink Semiconductor Inc.
Characteristics are over recommended operating conditions unless otherwise stated.
Figure 27 - Intel Non-Multiplexed Bus Timing - Write Access
AC Electrical Characteristics
- Intel Non-Multiplexed Bus Mode - Write Access
Characteristics
Sym.
Min.
Typ.
Max.
Units
Test Conditions
2
1
2
3
4
5
6
7
8
9
CS de-asserted time
WR setup to CS falling
RD setup to CS falling
Address setup to CS falling
Data setup to CS falling
WR hold after CS rising
RD hold after CS rising
Address hold after CS rising
Data hold after CS rising
t
CSD
t
WS
t
RS
t
AS
t
DS
t
WH
t
RH
t
AH
t
DH
15
10
10
5
0
0
0
10
5
ns
ns
ns
ns
ns
ns
ns
ns
ns
C
L
= 50 pF
C
L
= 50 pF, R
L
= 1 K
(Note 1)
10 Acknowledgement delay time.
From CS low to RDY high:
Registers
Memory
t
AKD
55
150
12
ns
ns
ns
C
L
= 50 pF
C
L
= 50 pF
11 Acknowledgement hold time.
From CS high to RDY low
12 RDY drive low to HiZ
t
AKH
4
C
L
= 50 pF, R
L
= 1 K
(Note 1)
t
AKZ
8
ns
Note 1:
High impedance is measured by pulling to the appropriate rail with R
L
, with timing corrected to cancel time taken to
discharge C
L
.
A delay of 500
μ
s to 2 ms (Section 18.2 on page 42) must be applied before the first microprocessor access is performed
after the RESET pin is set high.
Note 2:
CS
A0-A13
D0-D15
t
AH
t
RS
RD
t
RH
t
AKD
t
AKH
RDY
V
CT
V
CT
V
CT
V
CT
V
CT
VALID ADDRESS
t
CSD
t
AKZ
t
WS
WR
t
WH
V
CT
t
AS
VALID WRITE DATA
t
DS
t
DH
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