ATtiny48 datasheet(142/266 Pages) ATMEL

142 / 266 page

142

8008C–AVR–03/09

ATtiny48/88

Figure 15-14. Formats and States in the Master Receiver Mode

15.7.3

Slave Receiver Mode

In the Slave Receiver mode, a number of data bytes are received from a Master Transmitter

(see Figure 15-15). All the status codes mentioned in this section assume that the prescaler bits

are zero or are masked to zero.

Figure 15-15. Data transfer in Slave Receiver mode

SLA

DATA

$08

$40

$50

SLA

$10

$48

A or A

$38

Other master

continues

$38

Other master

continues

$68

Other master

continues

$78

$B0

To corresponding

states in slave mode

Successfull

reception

from a slave

receiver

Next transfer

started with a

repeated start

condition

Not acknowledge

received after the

slave address

Arbitration lost in slave

address or data byte

Arbitration lost and

addressed as slave

DATA

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. The

prescaler bits are zero or masked to zero

DATA

$58

Device 3

Device n

SDA

SCL

........

Device 2

MASTER

TRANSMITTER

Device 1

SLAVE

RECEIVER

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