ATmega168 Automotive Atmel Corporation, ATmega168 Automotive Datasheet - Page 230

• Manufacturer Part Number: ATmega168 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega168 Automotive

• Flash (kbytes): 16 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 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 150
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 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

230
ATmega48/88/168 Automotive
Table 19-6.
Status
Code
(TWSR)
Prescal-
er Bits
are 0
0xA8
0xB0
0xB8
0xC0
0xC8
Status of the 2-wire Seri-
al Bus and 2-wire Serial
Interface Hardware
Own SLA+R has been
received;
ACK has been returned
Arbitration
SLA+R/W
own SLA+R has been
received; ACK has been
returned
Data byte in TWDR has
been
transmitted;
been
received
Data byte in TWDR has
been
transmitted; NOT ACK
has been
received
Last data byte in TWDR
has
(TWEA = “0”); ACK has
been received
Status Codes for Slave Transmitter Mode
been
as
transmitted
ACK
lost
Master;
has
in
To/from
TWDR
Load
byte or
Load
byte
Load
byte or
Load
byte
Load
byte or
Load
byte
No TWDR ac-
tion or
No TWDR ac-
tion or
No TWDR ac-
tion or
No TWDR ac-
tion
No TWDR ac-
tion or
No TWDR ac-
tion or
No TWDR ac-
tion or
No TWDR ac-
tion
Application Software Response
data
data
data
data
data
data
ST
A
X
X
X
X
X
X
0
0
1
1
0
0
1
1
ST
O
To TWCR
0
0
0
0
0
0
0
0
0
0
0
0
0
0
TWI
NT
1
1
1
1
1
1
1
1
1
1
1
1
1
1
TW
EA
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Next Action Taken by TWI Hardware
Last data byte will be transmitted and
NOT ACK should be received
Data byte will be transmitted and ACK
should be received
Last data byte will be transmitted and
NOT ACK should be received
Data byte will be transmitted and ACK
should be received
Last data byte will be transmitted and
NOT ACK should be received
Data byte will be transmitted and ACK
should be received
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
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
7530I–AVR–02/10