参数资料
型号: GP2021
厂商: Mitel Networks Corporation
英文描述: GPS 12 channel Correlator Advance Information
中文描述: 全球定位系统12通道相关器研究进展信息
文件页数: 57/62页
文件大小: 372K
代理商: GP2021
60
GP2021
Timing Parameter Description
Symbol
Min
Max
Units
Notes
WREN or NCS Inactive to WREN and NCS active
τ
wcIwcA
23
ns
1
WREN and NCS Active to WREN or NCS inactive
τ
wcAwcI
10
ns
1
ALE_IP High to WREN and NCS Active pulse width
τ
alHwcA
13
ns
1
WREN and NCS Active to ALE_IP Low hold time
τ
wcAalL
6
ns
1, 2
Address Valid to WREN and NCS Active setup time
τ
adVwcA
9ns
1
WREN and NCS Active to Address Invalid hold time
τ
wcAadI
11
ns
1
READ Valid to WREN and NCS Active setup time
τ
rdVwcA
7
ns
1, 3
WREN and NCS Active to READ Invalid hold time
τ
wcArdI
5
ns
1, 3
DATA Valid to WREN or NCS Inactive setup time
τ
daVwcI
7ns
1
WREN or NCS Inactive to DATA Invalid hold time
τ
wcIdaI
5ns
1
Notes:
1
WREN is active High, NCS is Active Low.
2
If ALE_IP does not overlap WREN and NCS active by wcAalL then the timings for ALE_IP both overlapping
and non–overlapping WREN and NCS active must be met.
3
READ is transparently latched by WREN and NCS being active.
4
There is no parameter specified for WREN or NCS Inactive to ALE_IP High, since the internal ALE signal is
disabled until after the end of the internal Read or Write Strobe; hence the need for the wcIalL parameter.
WREN
NCS
READ
ALE_IP
A<9:2>
D<15:0>
DATA
VALID
wcIwcA
rdVwcA
rdIwcA
alHwcA
adVwcA
wcAadI
wcAdaV
wcIdaZ
ADDRESS
VALID
wcAalL
Fig. 41 : Motorola mode read, ALE_IP overlapping WREN and NCS (NARMSYS = 1, NINTELMOT = 1, WRPROG = X)
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