T7906E

The T7906E provides one IEEE-1355 serial communication link with 0 to 200 Mbit/s data transmit rate. It supports both the standard IEEE-1355 link protocol (transparent mode) as well as the header generation required for the enhanced transaction layer of the TSS901E. This protocol uses specific protocol headers that can be generated by the T7906E without requiring an external host controller. These headers are stored in specific header registers which allows headers with a length of 0 (equaling the transparent mode) to eight bytes per packet. Packetization of data sent by the T7906E over the link is also done automatically according to the settings of a packet length register.

Another feature provided by the transaction layer supported by the T7906E is an automatic checksum generation on the link. This is generated and checked automatically by the T7906E without requiring support from a host or other external source. Errors on the link are flagged and a special error packet is sent over the link to signal the error condition.

Programming the T7906E internal registers is done via the IEEE-1355 link. All internal registers are 8-bit wide addressable. Two simple commands (read and write) suffice to access all functions and registers of the T7906E.