參數(shù)資料
型號(hào): MT90810
廠商: Mitel Networks Corporation
英文描述: Flexible MVIP(Multi-Vendor Integration Protocol) Interface Circuit(彈性MVIP接口電路)
中文描述: 柔性MVIP(多廠商集成協(xié)議)接口電路(彈性MVIP接口電路)
文件頁(yè)數(shù): 31/33頁(yè)
文件大小: 176K
代理商: MT90810
Preliminary Information
MT90810
2-199
Figure 26 - DMA Interface Timing
AC Electrical Characteristics - DMA Timing
Characteristics
Sym
Min.
Typ.
Max.
Units
Test Conditions
1
C2o low to DACK1 asserted
t
CDAK1
t
CDAK0
t
DAKR
t
DAKW
t
CDRQ1
t
CDRQ0
t
RDRQ
DMA
controller
dependent
ns
2
C2o low to DACK0 asserted
ns
3
DACK1 asserted to RD low
ns
4
DACK0 asserted to WR low
ns
5
C2 low to DREQ1 asserted
0
30
ns
6
C2 low to DREQ0 asserted
0
30
ns
7
RD low (on 4th DMA read pulse) to
DREQ1 removed
0
30
ns
8
WR low (on 4th DMA write pulse) to
DREQ0 removed
t
WDRQ
0
30
ns
9
RD pulse width (DMA=fast read)
t
RW
t
WW
100
ns
8
WR pulse width (DMA=fast write)
100
ns
F0b
C2o
DREQ1
DACK1
DREQ0
RD
2Mb/s timeslot (3.9ms)
Detail a
t
CDAK1
t
DAKR
DACK0
t
CDAK0
t
DAKW
WR
Note:
DMA Read and Write cycles are asynchronous to C2o.
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