DMA2275 MICRONAS [Micronas], DMA2275 Datasheet - Page 5
![no-image](/images/no-image-200.jpg)
DMA2275
Manufacturer Part Number
DMA2275
Description
DMA 2275, DMA 2286 C/D/D2-MAC Descrambler
Manufacturer
MICRONAS [Micronas]
Datasheet
1.DMA2275.pdf
(48 pages)
- Current page: 5 of 48
- Download datasheet (214Kb)
2. Chip Architecture
Figure 2–1 shows the architecture of the descrambling
chip DMA 2286. The DMA 2275 architecture is identical
to the that of the DMA 2286, except that the sound pro-
cessor is missing. The chips can be subdivided into sev-
eral functional blocks.
DMA 2275 and DMA 2286:
Video Processor
– descrambling, panning and interpolation of the video
PRBS Generator
– delivers cut points and cipher streams
Line 625 Processor
– acquisition of service identification data and real time
Baseband
Vdd
Vdd
GND
GND
Fig. 2–1: Block diagram of the DMA 2286
signal
control information
8
Interface Processor
8
Code
Converter
DRAM
Interface
8
Video
Descrambler
3
Video
PRBS
Generator
Fast
Processor
IM Bus
Interface
8
Timing
Generator
Interpolation
Filter
Timing
Generator
PRBS Generator
Packet Processor
– acquisition of entitlement packets, acquisition of gen-
Interface Processor
– management of internal and external data transfer
Timing Generator
– delivers internal chip timing
DMA 2286 only:
Sound Processor
– spectrum descrambling of data burst, packet deinter-
eral purpose packets, selection of cipher stream, des-
crambling of data packets
leaving (one subframe only), sound packet processing
(one subframe only)
8
8
Line 625 Proc.
Packet Processor
Clamping +
Video Gate
Packet
Acquisition
Line 625
Acquisition
DMA 2275, DMA 2286
8
Video Processor
12
Spectr. Descr.
Deinterleaver
Packet
Descrambler
Sound
Processing
Packet
PRBS
Generator
2
Sound
Proc.
Baseband
VBI
Data
Corrected
Packet
Data
Descrambl.
Packet
Data
Packet
Data
Burst
Data
5
Related parts for DMA2275
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![SDA9400](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Scan rate converter using embedded DRAM technology unit
Manufacturer:
Micronas
Datasheet:
![VPX3226E](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Video pixel decoder
Manufacturer:
Micronas
Datasheet:
![DAC3550A](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Stereo audio DAC
Manufacturer:
Micronas
Datasheet:
![MSP3410D](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Multistandard sound processor
Manufacturer:
Micronas
Datasheet:
![VAD2150](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
VAD2150_Micronas.pdf
Manufacturer:
Micronas
Datasheet:
![SDA5650](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
VPS/PDC- plus decoder
Manufacturer:
Micronas
Datasheet:
![SDA6000](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Teletext decoder with embedded 16-bit controller M2
Manufacturer:
Micronas
Datasheet:
![SDA9589X](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
High-end picture-in-picture ICs
Manufacturer:
Micronas
Datasheet:
![SDA9488X](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Cost-effective picture-in-picture ICs
Manufacturer:
Micronas
Datasheet:
![SDA9588X](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Cost-effective picture-in-picture ICs
Manufacturer:
Micronas
Datasheet:
![SDA6001](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Teletext Decoder with Embedded 16-bit Controller
Manufacturer:
Micronas
Datasheet:
![MAS9181N](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Octal 8-Bit Trimmer, IC
Manufacturer:
Micronas
Datasheet:
![VPX3226E-A1](/images/manufacturer_photos/0/4/442/micronas_tmb.jpg)
Part Number:
Description:
Video Pixel Decoder
Manufacturer:
Micronas
Datasheet: