TIGER560 Datasheet, PDF (20/37 Pages) List of Unclassifed Manufacturers – USB Controller for Low Cost VoIP solutions

Tiger560
Advance Information
Software settings
Two software settings are required to enable the 4Mbit parallel port.
1. Set the alternate interface setting to 4. This will enable the first ISO endpoint as 512 byte of
read operation and the second ISO endpoint as 512 byte of write operation.
2. Set the internal register index 7 bit 0 to 1 to enable the high speed ISO.
3. Set register 0x00 bit 7 to 1 to enable VCLK as an output
Data transfer
When the interface is enabled, Tiger560 will start to monitor the USB interface for any matching
ISO package. When it detects a matching ISO package, it will generate a read or write cycle for
each byte transfer. The endpoint is defined as a 512-byte interface, so there will be 512 cycles in
each ISO package.
Each ISO package is a contiguous block of 512 bytes and will be completed in a 1ms interval.
In each 1ms interval there is one ISO read and one ISO write. The order of read and write is
scheduled by the USB hub controller and can be any combination and can change from one
interval to the next.
Revision 1.1 released on 2/20/01
Page 20