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 49/420

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Figure 11-3. MCU Start-up, RESET Extended Externally
TIME-OUT
INTERNAL
11.4
External Reset
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see
reset, even if the clock is not running. Shorter pulses are not guaranteed to generate a reset.
When the applied signal reaches the Reset Threshold Voltage – V
delay counter starts the MCU after the Time-out period – t
can be disabled by the RSTDISBL fuse, see
Figure 11-4. External Reset During Operation
11.5
Brown-out Detection
ATmega48P/88P/168P has an On-chip Brown-out Detection (BOD) circuit for monitoring the
V
level during operation by comparing it to a fixed trigger level. The trigger level for the BOD
CC
can be selected by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure spike
free Brown-out Detection. The hysteresis on the detection level should be interpreted as V
V
+ V
BOT
value below the trigger level (V
ately activated. When V
the delay counter starts the MCU after the Time-out period t
The BOD circuit will only detect a drop in V
ger than t
8025M–AVR–6/11
V
POT
V
CC
RESET
RESET
”System and Reset Characteristics” on page
CC
/2 and V
= V
- V
/2.When the BOD is enabled, and V
HYST
BOT-
BOT
HYST
in
Figure 11-5 on page
BOT-
increases above the trigger level (V
CC
given in
”System and Reset Characteristics” on page
BOD
ATmega48P/88P/168P
V
RST
t
TOUT
314) will generate a
– on its positive edge, the
RST
– has expired. The External Reset
TOUT
Table 28-6 on page
293.
50), the Brown-out Reset is immedi-
in
Figure 11-5 on page
BOT+
has expired.
TOUT
if the voltage stays below the trigger level for lon-
CC
314.
=
BOT+
decreases to a
CC
50),
49