LSI Symbios SYM53C040, Technical Manual

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6-9
matches the programmed Own Address (ES0, ES1, ES2
= 000) register ( 0xFD00/0xFD02 ) setting. When this bit is
cleared, the address matches the general call address.
LAB Lost Arbitration Bit 1
In a multiple master environment, if the SYM53C040
loses arbitration to another master on the bus, then it will
relinquish control to the other master and set this bit. It
should be noted that if two masters are simultaneously
active on the Data register interface requesting the exact
same operation, then the two masters will not observe
each other and a parallel operation has occurred.
BB_N Bus Busy 0
When active (logic 0), this active low bit signifies that the
Data register interface is currently in use and access is
not possible. It is activated upon detection of a start
condition and deactivated upon detection of a stop
condition.
Register: 0xFD04
Miscellaneous
Read Only
R Reserved [7:1]
CKSUM Checksum Error 0
This bit is set if an error was detected when checking the
checksum value after download.
7 1 0
R CKSUM
Defaults:
0 0 0 0 0 0 0 0