register that allows a default value to be overridden if it conflicts with future addresses fig1 identifies for the specific implementation parts used and their i2c addresses the scb slave device has a status and register ports that are used for controlling status leds monitoring board presence and interrupt status and controlling board resets in the specific implementation leds and resets are driven from the bd_led and bd_rst ports respectively and the bd_stat and bd_int ports are used to monitor board status bit and signal definitions for scb slave control and status lines are shown in fig1 in the specific implementation a board status indicator has a red green led at the top for a board bad good indication and a green led for active status indication with respect to the rcc 39 s functional memory map see fig1 in the specific implementation each rcc has 3 different regions of memory which are accessed by the spc through the scb bus local scb slave memory region local i2c memory region e g for ideeprom monitor and vc3002 memory region scb to mdio interface in the case of the local scb slave memory region the address map has functional blocks that can expand as necessary regions of unused memory may be scattered about in fig1 the format of the table shows main functional blocks in bold with sub blocks in normal script for example all.