Intel 80312 I/O Companion Chip - ECEE

Intel ® 80312 I/O Companion ChipI 2 C Bus Interface UnitTable 12-7.General Call Address Second Byte DefinitionsLeastSignificant Bitof Second Byte(B)Second ByteValueDefinition0 06H2-bytetransactionwherethesecondbytetellstheslavetoresetandthen store this value in the programmable part of their slave address.0 04H2-bytetransactionwherethesecondbytetellstheslavetostorethisvalue in the programmable part of their slave address. No reset.0 00H Not allowed as a second byteWhen directed to reset, the I 2 C Bus Interface Unit returns to its default reset condition with theexception of the ISAR. The companion chip is responsible for ensuring this occurs, not the I 2 CBusInterface Unit hardware.When B=1, the sequence is used as a hardware general call by hardware masters only they cannottransmit a slave address, only their own address. The I 2 C Bus Interface Unit does not support thismode of operation.I 2 C 10-bit addressing and CBUS compatibility are not supported.Developer’s Manual 12-21