ATmega168A Atmel Corporation, ATmega168A Datasheet - Page 92

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ATmega168A

Manufacturer Part Number
ATmega168A
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATmega168A

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
Yes
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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8271D–AVR–05/11
• INT0/PCINT18 – Port D, Bit 2
INT0, External Interrupt source 0: The PD2 pin can serve as an external interrupt source.
PCINT18: Pin Change Interrupt source 18. The PD2 pin can serve as an external interrupt
source.
• TXD/PCINT17 – Port D, Bit 1
TXD, Transmit Data (Data output pin for the USART). When the USART Transmitter is enabled,
this pin is configured as an output regardless of the value of DDD1.
PCINT17: Pin Change Interrupt source 17. The PD1 pin can serve as an external interrupt
source.
• RXD/PCINT16 – Port D, Bit 0
RXD, Receive Data (Data input pin for the USART). When the USART Receiver is enabled this
pin is configured as an input regardless of the value of DDD0. When the USART forces this pin
to be an input, the pull-up can still be controlled by the PORTD0 bit.
PCINT16: Pin Change Interrupt source 16. The PD0 pin can serve as an external interrupt
source.
Table 14-10
shown in
Table 14-10. Overriding Signals for Alternate Functions PD7...PD4
Signal
Name
PUOE
PUO
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Figure 14-5 on page
PD7/AIN1
/PCINT23
0
0
0
0
0
0
PCINT23 • PCIE2
1
PCINT23 INPUT
AIN1 INPUT
and
Table 14-11
ATmega48A/PA/88A/PA/168A/PA/328/P
82.
relate the alternate functions of Port D to the overriding signals
PD6/AIN0/
OC0A/PCINT22
0
0
0
0
OC0A ENABLE
OC0A
PCINT22 • PCIE2
1
PCINT22 INPUT
AIN0 INPUT
PD5/T1/OC0B/
PCINT21
0
0
0
0
OC0B ENABLE
OC0B
PCINT21 • PCIE2
1
PCINT21 INPUT
T1 INPUT
PD4/XCK/
T0/PCINT20
0
0
0
0
UMSEL
XCK OUTPUT
PCINT20 • PCIE2
1
PCINT20 INPUT
XCK INPUT
T0 INPUT
92