ATmega168 Atmel Corporation, ATmega168 Datasheet - Page 231
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ATmega168
Manufacturer Part Number
ATmega168
Description
Manufacturer
Atmel Corporation
Specifications of ATmega168
Flash (kbytes)
16 Kbytes
Pin Count
32
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
23
Ext Interrupts
24
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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22.7.4
2545T–AVR–05/11
Slave transmitter mode
Figure 22-16. Formats and states in the slave receiver mode.
In the Slave Transmitter mode, a number of data bytes are transmitted to a Master Receiver
(see
are zero or are masked to zero.
Figure 22-17. Data transfer in slave transmitter mode.
Figure
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
Arbitration lost as master and
addressed as slave by general call
SDA
SCL
22-17). All the status codes mentioned in this section assume that the prescaler bits
From master to slave
From slave to master
TRANSMITTER
Device 1
S
SLAVE
SLA
General call
Device 2
RECEIVER
MASTER
W
DATA
$60
$68
$70
$78
Device 3
A
A
A
A
n
A
........
DATA
DATA
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
Device n
ATmega48/88/168
$80
$90
V
A
A
CC
DATA
DATA
R1
$80
$90
$88
$98
A
A
A
A
R2
P or S
P or S
P or S
P or S
$A0
$A0
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