Datasheet

7−1
7 Serial EEPROM Interface
The TSB82AA2B device provides a serial bus interface to initialize the 1394 global unique ID register and a few PCI
configuration registers through a serial EEPROM. The TSB82AA2B device communicates with the serial EEPROM
via the 2-wire serial interface.
After power up, the serial interface initializes the locations listed in Table 7−1. While the TSB82AA2B device accesses
the serial EEPROM, all incoming PCI slave accesses are terminated with retry status. Table 7−1 shows the serial
EEPROM memory map required for initializing the TSB82AA2B registers.
NOTE: If a ROM is implemented in the design, it must be programmed. An unprogrammed
ROM defaults to all 1s, which could adversely impact device operation.