Fujitsu F2MC-16LX Hardware Manual page 542

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CHAPTER 22 I C INTERFACE
[bit 4] LRB: Last Received bit
It is the acknowledgement storage bit. Stores the acknowledge from the receiver.
0
1
It is cleared by detecting the start condition or the stop condition.
[bit 3] TRX: Transfer/Receive
It is the bit indicating sending and receiving of data transfer.
0
1
[bit 2] AAS: Addressed As Slave
It is Addressing detection bit.
0
1
It is cleared by detecting of the start condition or stop condition.
[bit 1] GCA: General Call Address
It is General call address (00
0
1
It is cleared by detecting of the start condition or stop condition.
[bit 0] FBT: First Byte Transfer
It is a first byte detection bit.
0
1
It is cleared either if "0" is written in INT bit or if no addressing is provided on the slave connection, even
though detection of the start condition has set "1".
526
Reception is acknowledged.
Reception is not acknowledged.
Receiving state
Transmission state
Addressing is not done at the slave.
Addressing was done at the slave.
) detection bit.
H
The General call address is not received at the slave.
The General call address was received at the slave.
Received data is things except the first byte.
Received data is a first byte (address data).