Rainbow Electronics AT89C51SND1C - Manual (Page 166)

166
AT8xC51SND1C
4109E–8051–06/03
Figure 128. Format and States in the Slave Transmitter Mode
A Data
B0h
A SLA
Data A From master to slave
From slave to master
Any number of data Bytes and their associated
acknowledge bits
This number (contained in SSSTA) corresponds
to a defined state of the TWI bus
S R
A8h
A P or S
C0h
All 1’s A P or S
C8h
nnh
Data
B8h
A
Arbitration lost as master and
addressed as slave
Reception of the own slave
address and transmission
of one or more data Bytes.
Last data Byte transmitted.
Switched to not addressed
slave (SSAA = 0).