ADV212 AD [Analog Devices], ADV212 Datasheet - Page 10
ADV212
Manufacturer Part Number
ADV212
Description
JPEG 2000 Video Codec
Manufacturer
AD [Analog Devices]
Datasheet
1.ADV212.pdf
(44 pages)
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ADV212
DREQ/DACK DMA MODE—SINGLE FIFO READ OPERATION
Table 7.
Parameter
DREQ Pulse Width
DACK Assert to Subsequent DREQ Delay
RD to DACK Setup
DACK to Data Valid
Data Hold
DACK Assert Pulse Width
DACK Deassert Pulse Width
RD Hold after DACK Deassert
RD Assert to FSRQ Deassert (FIFO Empty)
DACK to DREQ Deassert (DR × PULS = 0)
1
For a definition of JCLK, see Figure 32.
HDATA
HDATA
DREQ
DACK
DREQ
DACK
RD
RD
DREQ
t
t
Figure 10. Single Read for DREQ / DACK DMA Mode for Assigned DMA Channel
RDSU
RDSU
Figure 9. Single Read for DREQ / DACK DMA Mode for Assigned DMA Channel
PULSE
(EDMOD0/EDMOD1 <14:11> Not Programmed to a Value of 0000)
(EDMOD0/EDMOD1 <14:11> Programmed to a Value of 0000)
DACK
DACK
t
t
RD
RD
t
LO
t
LO
DREQ
DREQRTN
0
0
DACK
DACK
t
t
HD
HD
HI
HI
Rev. 0 | Page 10 of 44
Mnemonic
DREQ
t
t
t
t
DACK
DACK
t
RDFSRQ
t
DREQ
RD SU
RD
HD
RD HD
DREQ RTN
PULSE
LO
HI
1
1
Min
1 JCLK
2.5 JCLK
0
2.5
1.5
2 JCLK
2 JCLK
0
1.5 JCLK
2.5 JCLK
1
2
2
Typ
t
t
RDHD
RDHD
Max
15 JCLK
3.5 × JCLK + 9.0
11
2.5 × JCLK + 9.0
3.5 × JCLK + 9.0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns