ATMEGA168-15AZ Atmel, ATMEGA168-15AZ Datasheet - Page 230

• Manufacturer Part Number: ATMEGA168-15AZ
• Description: MCU AVR 16K FLASH 15MHZ 32-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA168-15AZ

• Package / Case: 32-TQFP, 32-VQFP
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 23
• Eeprom Size: 512 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Program Memory Size: 16KB (16K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 16MHz
• Interface Type: 2-Wire/USART/Serial
• Total Internal Ram Size: 1KB
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 32
• Package Type: TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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