參數(shù)資料
型號(hào): ADV202BBC-115
廠商: ANALOG DEVICES INC
元件分類: 消費(fèi)家電
英文描述: Circular Connector; No. of Contacts:22; Series:LJTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:13; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:13-35
中文描述: SPECIALTY CONSUMER CIRCUIT, PBGA121
封裝: 12 X 12 MM, MO-192-ABD-1, CSPBGA-121
文件頁數(shù): 10/40頁
文件大?。?/td> 841K
代理商: ADV202BBC-115
ADV202
DREQ/DACK DMA MODE—SINGLE FIFO READ OPERATION
Table 7.
Parameter
Description
DREQ
PULSE
DREQ Pulse Width
1
t
DREQ
DACK Assert to Subsequent DREQ Delay
t
RDSU
RD to DACK Setup
t
RD
DACK to Data Valid
t
HD
Data Hold
DACK
LO
DACK Assert Pulse Width
DACK
HI
DACK Deassert Pulse Width
t
RDHD
RD Hold after DACK Deassert
RDFSRQ
RD Assert to FSRQ Deassert (FIFO Empty)
t
DREQRTN
DACK to DREQ Deassert (DR × PULS = 0)
Rev. 0 | Page 10 of 40
Min
1
2.5
0
Typ
Max
15
3.5 × JCLK + 7.5 ns
Unit
JCLK cycles
2
JCLK cycles
ns
2.5
11
ns
1.5
2
2
0
ns
JCLK cycles
JCLK cycles
ns
1.5
2.5
2.5 × JCLK + 7.5 ns
3.5 × JCLK + 7.5 ns
JCLK cycles
JCLK cycles
1
Applies to assigned DMA channel, if EDMOD0 or EDMOD1 <14:11> is programmed to a nonzero value.
2
For a definition of JCLK, see the
section.
PLL
0
RD
DACK
DREQ
HDATA
0
1
2
t
RD
t
HD
DREQ
PULSE
t
DREQ
t
RDSU
t
RDHD
DACK
HI
DACK
LO
Figure 9. Single Read for DREQ/DACK DMA Mode for Assigned DMA Channel
(EDMOD0/EDMOD1 <14:11> NOT Programmed to a Value of 0000)
0
RD
DACK
DREQ
HDATA
0
1
2
t
RD
t
HD
t
DREQRTN
t
RDSU
t
RDHD
DACK
HI
DACK
LO
Figure 10. Single Read forDREQ/DACK DMA Mode for Assigned DMA Channel
(EDMOD0/EDMOD1 <14:11> Programmed to a Value of 0000)
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