USBvision
TM
II
ZR36504
Video & Audio Interface solution via USB
Data Sheet
Revision 1.00
September 1999.
Zoran reserves the right to make changes without further notice to any product herein. Zoran makes no warranty,
representation or guarantee regarding the suitability of its products for any particular purpose, nor does Zoran assume
any liability arising out of the application or use of any product or circuit, and spec ifically disclaims any and all liability,
including without limitation consequential or incidental damages. Zoran products are not designed, intended, or
authorized for use as components in systems intended for surgical implant into the body, or other applications intended
ZORAN Corporation
USBvision II Data Decoder
ZR36505 Data Sheet
Table of Contents:
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General Architecture
............................................................................................................................. 15
Registers Bank (Control and Status)
.............................................................................................. 18
Power Management
.............................................................................................................................. 25
Video Input Interface
........................................................................................................................... 27
DRAM Control and Interface
........................................................................................................... 42
Camera Control Serial Port
............................................................................................................... 47
External EEPROM
................................................................................................................................ 55
ZR36504 USB and Status Registers
............................................................................................. 63
Programmable I/O Pins and 48MHz output pin
........................................................................ 65
Audio Channel
........................................................................................................................................ 66
Bulk Channel
........................................................................................................................................... 68
Software Package
................................................................................................................................. 71
Mechanical Specification
.................................................................................................................... 72
November-99
Page 3 of 3
ZORAN Corporation
USBvision II Data Decoder
ZR36505 Data Sheet
ZR36504 -
Full Video and Audio Interface solution for Video via USB
The ZR36504 is an ideal solution for digital camera manufacturers who want to utilize the Universal
Serial Bus as an interface between the camera and the computer. Using a proprietary video compression
algorithm, the ZR36504 enables a throughput of up to 30f/s for CIF size images and up to 15f/s for VGA
size images, utilizing only half of total available bandwidth of the USB port. An appropriate software
driver in the host computer de-compresses the incoming USB data, consuming only 25% of CPU time
(@ CIF 30f/s). The resulting digital image quality is almost identical to the source coming from the
camera. This monolithic feature of the ZR36504 makes it ideal to be used as a one chip solution for a
very low cost USB portable Video Camera.
The ZR36504 can also be used to transfer video sequence from a Composite-Video source to the
computer for editing (this requires an additional video decoder chip). Due to the fact that the USB
bandwidth used by the ZR36504 can be adjusted (0.5-7.5 Mbit/sec), the video software application
always has enough time to record the incoming compressed video data on disk and display full frame -
rate on screen simultaneously.
The ZR36504 is compatible with the NT1003-1, but has a smaller package. It supports simultaneous
Serial Digital Audio input and simultaneous external Bulk-Data input as well, and eliminates the need for
an external EEPROM to set a specific manufacturer USB ID code. The ZR36504 also supports 16 Mbit
DRAMs for a better quality VGA video and still capture.
Features
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Up to 30 frames/sec @ CIF size (352x288 pixels)
Up to 15 frames/sec @ VGA size (640x480 pixels)
Connects to various YUV sources (4:4:4, 4:2:2, 16 or 8-bit bus)
Selectable Raw/Compressed video out
Variable Compression ratio
Selectable USB bandwidth (0.5Mbps - 7.5Mbps in 0.5Mbps steps):
Built-in programmable true scaler (Down Scale - horizontal and vertical)
Built in Zoom and Pan capabilities
Supports high resolution still image capture (640x480 pixels)
Supports serial Digital Audio input (8K/16K samp/sec, 8-bit
µ
-Law / 16-bit linear)
Auxiliary simultaneous external serial Bulk-data input (0 to 2Mbit/sec).
Selectable Data/Clock serial protocols - ideal for camera control
Low power consumption (190mW @ 3.3V) - can use USB power source
Direct connection to USB port
Handles device Power Management (complies with USB standard spec.)
Fits Intel’s MMX concept
Supports most popular software applications that require digital video.
Available in 100-pin PQFP and TQFP packages
November-99
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