AT89C5132_07 Datasheet, PDF (136/182 Pages) ATMEL Corporation – USB Microcontroller with 64K Bytes Flash Memory

Figure 20-3. Format and States in the Master Transmitter Mode
MT
Successful transmis-
sion to a slave receiver
S
SLA
08h
Next transfer started with
a repeated start condition
WA
18h
Data
Not acknowledge received
after the slave address
Not acknowledge received
after a data Byte
AP
20h
Arbitration lost in slave
address or data Byte
Arbitration lost and
addressed as slave
A or A
Other master
continues
38h
A
Other master
continues
68h 78h B0h
AP
28h
S
SLA
W
10h
R
MR
AP
30h
A or A
Other master
continues
38h
To corresponding
states in slave mode
From master to slave
From slave to master
Data
A
Any number of data Bytes and their associated
acknowledge bits
nnh
This number (contained in SSSTA) corresponds
to a defined state of the TWI bus
136 AT89C5132
4173E–USB–09/07