IDT77V012

The IDT77V012 provides full header translation functionality along with Data Path Interface (DPI) to UTOPIA Level 1 translation for switch and DSLAM designs using the IDT SwitchStar. The address search and replacement algorithm is performed using a VPI Tunneling or Full Header format on 8, 12, 24, 28 or 32-bits of the header. This added flexibility makes it suitable for both UNI and NNI formats. External memory is required to perform the header translation (receive direction only), which will support up to 16K connections using a 256K x 32 SRAM. The new header, which is obtained as a result of the search, can be used to overwrite the existing cell header in the receive path. A four byte TAG can also be added to aid in routing cells.

The 77V012 also contains cell counters in the transmit and receive direction. The counters can be used to provide detailed per VC accounting information for a particular port.Other features include In-Stream™ programming, which can be utilized on either the DPI or UTOPIA interfaces, a Utility Bus interface for accessing registers in the PHY device, and an interface for an EEPROM.