OVERVIEW
The PM5945 SAPI daughter board contains the PMC PM5345 SUNI-155 (SATURN User Network Interface), the Cypress CY7B951 SONET/SDH Serial Transceiver (a clock and data recovery and clock synthesis unit), and optical PMD in a complete optical ATM (Asynchronous Transfer Mode) physical interface. The SUNI is an ATM physical layer processor for a SONET STS-3C transmission system. This daughter board has been designed to mate with National Semiconductor Corporations Vicksburg EISA adapter motherboard to form a complete evaluation system. The SAPI daughter board is configured, monitored, and powered through a 100 pin edge connector that mates with the Vicksburg motherboard. The motherboard provides all of the software and decoding logic necessary to directly access all of the registers on the SAPI board.