 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ZR36067 Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers |
|
||||||||||||||||||||||||||||||
ZR36067 Datasheet(HTML) 9 Page - List of Unclassifed Manufacturers |
|
|
9 / 48 page  9 AV PCI CONTROLLER and “Gib” Endian formats are supported where applicable (Refer to the PCI Multimedia Design Guide, Revision 1.0). 4.2.2 Display Modes The display mode can be configured to either emulated inter- laced video (both input fields are displayed simultaneously on the non-interlaced monitor) or single field display. The latter is appropriate for motion artifact elimination when displaying live or decompressed Motion JPEG video. 4.2.3 Frame Grabbing The ZR36067 can grab video frames (scaled or non scaled), or fields, in any of the pixel formats listed above, directly into system memory, eliminating the need for memory on the add-in board. 4.2.4 Overlay Control Graphics overlay is supported, in that display memory areas that are “owned” by graphics applications, may not be loaded with video pixels, allowing true windowing and overlay. The software driver prepares a masking map of the video rectangle, and the ZR36067 uses this map for masking decision, when transferring the pixels to the display memory. 4.3 Host Control/Communication Services 4.3.1 Application-Specific Registers (ASRs) The name “application-specific” distinguishes these registers from the PCI configuration space registers. These memory mapped registers provide the host software with full control over the operation of the ZR36067. The ZR36067 claims a contigu- ous space of 4 KBytes in system memory. 4.3.2 GuestBus Host software control over non-PCI devices, such as a Motion JPEG codec, an MPEG decoder, a video encoder, etc., is done through the ZR36067’s GuestBus. Host accesses to these “guest” devices, mapped as application specific registers inside the ZR36067, are output as GuestBus cycles. Such accesses can either use the PostOffice handshaking protocol, or the Code DMA Controller. The first method is adequate for commands, configuration data, etc., while the second method provides a faster channel, and is intended for continuous transfer of data such as a compressed bitstream. 4.3.3 PostOffice Handshaking Protocol The ZR36067 PostOffice handshaking protocol, implemented over the GuestBus, allows host accesses to relatively slow guest devices, with no degradation of the PCI bus performance. 4.3.4 Still Transfer Mechanism The ZR36067 supports a dedicated Still Transfer port, by means of which the host writes (reads) image pixels in JPEG Still Image Compression (Decompression) mode. The Still Transfer port is mapped inside the ASR area, and a special controller intercon- nects this port to the ZR36067’s extended video bus (24 bits RGB). The Still Transfer handshake protocol enables high rate pixels transfer between the system memory and the JPEG pro- cessor via the ZR36067. 4.3.5 I2C Port A software-driven I2C port allows controlling of I2C devices. 4.3.6 Interrupt Manager Interrupt requests associated with several internal and external conditions are sent to the host via the PCI bus (using INTA). Selection of interrupt originators is programmable. 4.4 Code DMA Controller The ZR36067 includes a DMA channel for transferring data between the system memory and a selected device on the Code Bus or GuestBus. Two configurations are supported: • MPEG mode. The data flow is unidirectional, from the sys- tem memory, to the ZR36067’s GuestBus. • JPEG mode. The data flow is bidirectional, and the direction is determined by the selected sub-mode. In JPEG Compres- sion, the data flows from the Codec bus to the system memory. In JPEG Decompression, the data flows from the system memory to the Codec bus. 4.4.1 MPEG Mode In MPEG mode, the data flows from the system memory to the ZR36067’s GuestBus. Typically, this would be a compressed bit- stream, to be decompressed by a device such as an MPEG decoder attached to the GuestBus. Other examples are sampled audio (WAV data), MIDI token stream, etc. Temporary latencies on the PCI bus or the GuestBus are handled without loss of data. The GuestBus master simultaneously serves the PostOffice accesses and the code DMA transfers: DMA transfers are viewed as the “main” task of the GuestBus master, while any number of PostOffice requests may occasionally interrupt the DMA traffic. The DMA controller supports both auto-initialized (cyclic) block transfers, or single block transfers. The size of the destination block in main memory can be selected out of several possible sizes, ranging from 8 KBytes up to 256 KBytes. The destination block may also be virtually split into several sub-blocks, allowing the ZR36067 to interrupt the host when a sub-block has been transferred. This feature provides the software with a means of optimizing the refill accesses according to the application requirements and the disk performance. 4.4.2 JPEG Modes In the JPEG modes, the data flows between the system memory and the ZR36067’s Codec bus. In JPEG Compression, from the |
Similar Part No. - ZR36067 |
|
Similar Description - ZR36067 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
