ATmega168P

Manufacturer Part NumberATmega168P
ManufacturerAtmel Corporation
ATmega168P datasheets
 


Specifications of ATmega168P

Flash (kbytes)16 KbytesPin Count32
Max. Operating Frequency20 MHzCpu8-bit AVR
# Of Touch Channels16Hardware Qtouch AcquisitionNo
Max I/o Pins23Ext Interrupts24
Usb SpeedNoUsb InterfaceNo
Spi2Twi (i2c)1
Uart1Graphic LcdNo
Video DecoderNoCamera InterfaceNo
Adc Channels8Adc Resolution (bits)10
Adc Speed (ksps)15Analog Comparators1
Resistive Touch ScreenNoTemp. SensorYes
Crypto EngineNoSram (kbytes)1
Eeprom (bytes)512Self Program MemoryYES
Dram MemoryNoNand InterfaceNo
PicopowerYesTemp. Range (deg C)-40 to 85
I/o Supply Class1.8 to 5.5Operating Voltage (vcc)1.8 to 5.5
FpuNoMpu / Mmuno / no
Timers3Output Compare Channels6
Input Capture Channels1Pwm Channels6
32khz RtcYesCalibrated Rc OscillatorYes
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Page 236/420

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Table 22-5.
Status Codes for Slave Transmitter Mode
Status Code
(TWSR)
Status of the 2-wire Serial Bus
Prescaler
and 2-wire Serial Interface Hard-
Bits
ware
are 0
0xA8
Own SLA+R has been received;
ACK has been returned
0xB0
Arbitration lost in SLA+R/W as
Master; own SLA+R has been
received; ACK has been returned
0xB8
Data byte in TWDR has been
transmitted; ACK has been
received
0xC0
Data byte in TWDR has been
transmitted; NOT ACK has been
received
0xC8
Last data byte in TWDR has been
transmitted (TWEA = “0”); ACK
has been received
ATmega48P/88P/168P
236
Application Software Response
To TWCR
To/from TWDR
STA
STO
TWIN
T
Load data byte or
X
0
1
Load data byte
X
0
1
Load data byte or
X
0
1
Load data byte
X
0
1
Load data byte or
X
0
1
Load data byte
X
0
1
No TWDR action or
0
0
1
No TWDR action or
0
0
1
No TWDR action or
1
0
1
No TWDR action
1
0
1
No TWDR action or
0
0
1
No TWDR action or
0
0
1
No TWDR action or
1
0
1
No TWDR action
1
0
1
TWE
Next Action Taken by TWI Hardware
A
0
Last data byte will be transmitted and NOT ACK should
be received
1
Data byte will be transmitted and ACK should be re-
ceived
0
Last data byte will be transmitted and NOT ACK should
be received
1
Data byte will be transmitted and ACK should be re-
ceived
0
Last data byte will be transmitted and NOT ACK should
be received
1
Data byte will be transmitted and ACK should be re-
ceived
0
Switched to the not addressed Slave mode;
no recognition of own SLA or GCA
1
Switched to the not addressed Slave mode;
own SLA will be recognized;
GCA will be recognized if TWGCE = “1”
0
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
1
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
0
Switched to the not addressed Slave mode;
no recognition of own SLA or GCA
1
Switched to the not addressed Slave mode;
own SLA will be recognized;
GCA will be recognized if TWGCE = “1”
0
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
1
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
8025M–AVR–6/11