Rainbow Electronics AT89C51SND1C - Manual (Page 165)

165
AT8xC51SND1C
4109E–8051–06/03
Figure 127. Format and States in the Slave Receiver Mode
A Data
68h
A SLA
Reception of the own slave
address and one or more
Last data Byte received
is not acknowledged
Arbitration lost as master and
addressed as slave
Reception of the general call
address and one or more data Bytes
Arbitration lost as master and
addressed as slave by general call
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 W
60h
A P or S
80h
A
nnh
Data
80h A0h
88h
A P or S
A Data
78h
A General Call
70h
A P or S
90h
A
Data
90h A0h
98h
A P or S
data Bytes.
All are acknowledged
Last data Byte received
is not acknowledged