ADV212 AD [Analog Devices], ADV212 Datasheet - Page 8

• Manufacturer Part Number: ADV212
• Description: JPEG 2000 Video Codec
• Manufacturer: AD [Analog Devices]

ADV212
DREQ/DACK DMA MODE—SINGLE FIFO WRITE OPERATION
Table 6.
Parameter
DREQ Pulse Width
DACK Assert to Subsequent DREQ Delay
WE to DACK Setup
Data to DACK Deassert Setup
Data to DACK Deassert Hold
DACK Assert Pulse Width
DACK Deassert Pulse Width
WE Hold After DACK Deassert
WE Assert to FSRQ Deassert (FIFO Full)
DACK to DREQ Deassert (DR × PULS = 0)
1
For a definition of JCLK, see Figure 32.
HDATA
HDATA
DREQ
DACK
DREQ
DACK
WE
WE
DREQ
t
t
WESU
WESU
Figure 5. Single Write for DREQ / DACK DMA Mode for Assigned DMA Channel
Figure 6. Single Write 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
SU
SU
t
t
LO
LO
DREQ
DREQRTN
0
0
t
t
DACK
HD
DACK
HD
HI
HI
Mnemonic
DREQ
t
t
t
t
DACK
DACK
t
WFSRQ
t
DREQ
WE SU
SU
HD
WE HD
DREQ RTN
Rev. 0 | Page 8 of 44
1
LO
HI
PULSE
1
Min
1 JCLK
2.5 JCLK
0
2
2
2 JCLK
2 JCLK
0
1.5 JCLK
2.5 JCLK
2
1
2
Typ
t
t
WEHD
WEHD
Max
15 JCLK
3.5 × JCLK + 8.5
2.5 × JCLK + 7.5
3.5 × JCLK + 9.0
3
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns