ATmega64A
Figure 21-16. Formats and States in the Slave Receiver Mode
Reception of the own
S
SLA
W
A
DATA
A
DATA
A
P or S
slave address and one or
more data bytes. All are
acknowledged
$60
$80
$80
A
$A0
Last data byte received
is not acknowledged
P or S
$88
Arbitration lost as master
and addressed as slave
A
$68
A
Reception of the general call
address and one or more data
bytes
General Call
DATA
A
DATA
A
P or S
$70
$90
$90
A
$A0
Last data byte received is
not acknowledged
P or S
$98
Arbitration lost as master and
addressed as slave by general call
A
$78
Any number of data bytes
and their associated acknowledge bits
From master to slave
From slave to master
DATA
A
This number (contained in TWSR) corresponds
to a defined state of the Two-wire Serial Bus. The
prescaler bits are zero or masked to zero
n
21.7.4
Slave Transmitter Mode
In the Slave Transmitter mode, a number of data bytes are transmitted to a master receiver (see
Figure 21-17). All the status codes mentioned in this section assume that the prescaler bits are
zero or are masked to zero.
221
8160C–AVR–07/09
ATMEL [ ATMEL ]
