GP2021 Datasheet, PDF (57/62 Pages) Mitel Networks Corporation – GPS 12 channel Correlator Advance Information

GP2021
WREN
NCS
READ
ALE_IP
A<9:2>
D<15:0>
wcIwcA
rdVwcA
wcIalL
alHalL
wcAwcI
wcArdI
adValL alLadI
ADDRESS
VALID
daVwcI
wcIdaI
DATA
VALID
Fig. 38 : Motorola mode write, ALE_IP non-overlapping WREN and NCS (NARMSYS = 1, NINTELMOT = 1, WRPROG = X)
Timing Parameter Description
WREN or NCS Inactive to WREN and NCS active
WREN and NCS active to WREN or NCS inactive
ALE_IP High to ALE_IP Low pulse width
WREN or NCS Inactive to ALE_IP Low Hold off time
Address Valid to ALE_IP Low setup time
ALE_IP Low to Address Invalid hold time
READ Valid to WREN and NCS Active setup time
WREN and NCS Active to READ Invalid hold time
DATA Valid to WREN or NCS Inactive setup time
WREN or NCS Inactive to DATA Invalid hold time
Symbol
τ_wcIwcA
τ_wcAwcI
τ_alHalL
τ_wcIalL
τ_adValL
τ _alLadI
τ_rdVwcA
τ_wcArdI
τ_daVwcI
τ_wcIdaI
Min
Max
Units Notes
23
ns
1
10
ns
1
13
ns
23
ns
1
9
ns
8
ns
7
ns
1, 2
5
ns
1, 2
7
ns
1
5
ns
1
Notes:
1 WREN is active High, NCS is Active Low.
2 READ is transparently latched by WREN and NCS being active.
3 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 τ_wcIalL parameter.
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