ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 160

• Manufacturer Part Number: ATmega406
• Manufacturer: Atmel Corporation

Specifications of ATmega406

• Flash (kbytes): 40 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 1 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 18
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -30 to 85
• I/o Supply Class: 4.0 to 25
• Operating Voltage (vcc): 4.0 to 25
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Pwm Channels: 2
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

25.8.3
160
ATmega406
Slave Receiver Mode
Figure 25-15. Formats and States in the Master Receiver Mode
In the Slave Receiver mode, a number of data bytes are received from a master transmitter (see
Figure
zero or are masked to zero.
Figure 25-16. Data Transfer in Slave Receiver Mode
To initiate the Slave Receiver mode, TWAR and TWCR must be initialized as follows:
SDA
SCL
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
25-16). All the status codes mentioned in this section assume that the prescaler bits are
Device 1
RECEIVER
From master to slave
From slave to master
$08
SLAVE
S
SLA
TRANSMITTER
Device 2
MASTER
R
MR
A or A
DATA
$40
$48
$38
$68
A
A
A
$78
Device 3
Other master
Other master
n
continues
continues
P
$B0
DATA
A
Any number of data bytes
and their associated acknowledge bits
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
........
$50
$38
To corresponding
states in slave mode
A
A
Device n
Other master
DATA
continues
V
BUS
$58
A
$10
P
R
R1
S
SLA
R2
2548E–AVR–07/06
W
R
MT