Rainbow Electronics ATmega163L - Manual (Page 82)

ATmega163(L)
82
Figure 54. Formats and States in the Slave Receiver Mode
$A0 A STOP condition or repeated
START condition has been
received while still addressed as
slave
Read data byte or
Read data byte or
Read data byte or
Read data byte
0
0
1
1
0
0
0
0
1
1
1
1
0
1
0
1
Switched to the not addressed slave mode;
no recognition of own SLA or GCA
Switched to the not addressed slave mode;
own SLA will be recognized;
GCA will be recognized if TWGCE = ‘1’
Switched to the not addressed slave mode;
no recognition of own SLA or GCA;
a START condition will be transmitted when the bus
becomes free
Switched to the not addressed slave mode;
own SLA will be recognized;
GCA will be recognized if TWGCE = ‘1’;
a START condition will be transmitted when the bus
becomes free
Table 34. Status Codes for Slave Receiver Mode (Continued)
S SLA W A DATA A
$60 $80
$88
A
$68
Reception of the own
slave address and one or
more data bytes. All are
acknowledged
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
Last data byte received is
not acknowledged
n
From master to slave
From slave to master
Any number of data bytes
and their associated acknowledge bits
This number (contained in TWSR) corresponds
to a defined state of the 2-Wire Serial Bus
P or S DATA A
$80 $A0
P or S A
A DATA A
$70 $90
$98
A
$78
P or S DATA A
$90 $A0
P or S A
General Call
Arbitration lost as master and
addressed as slave by general call
DATA A