ATmega169P Atmel Corporation, ATmega169P Datasheet - Page 42

• Manufacturer Part Number: ATmega169P
• Manufacturer: Atmel Corporation

Specifications of ATmega169P

• Flash (kbytes): 16 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 17
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Segment Lcd: 100
• 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: Yes
• 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: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

9.5
9.6
9.7
8018P–AVR–08/10
Power-save Mode
Standby Mode
Power Reduction Register
When the SM2..0 bits are written to 011, the SLEEP instruction makes the MCU enter Power-
save mode. This mode is identical to Power-down, with one exception:
If Timer/Counter2 and/or the LCD controller are enabled, they will keep running during sleep.
The device can wake up from either Timer Overflow or Output Compare event from
Timer/Counter2 if the corresponding Timer/Counter2 interrupt enable bits are set in TIMSK2,
and the Global Interrupt Enable bit in SREG is set. It can also wake up from an LCD controller
interrupt.
If neither Timer/Counter2 nor the LCD controller is running, Power-down mode is recommended
instead of Power-save mode.
The LCD controller and Timer/Counter2 can be clocked both synchronously and asynchronously
in Power-save mode. The clock source for the two modules can be selected independent of
each other. If neither the LCD controller nor the Timer/Counter2 is using the asynchronous
clock, the Timer/Counter Oscillator is stopped during sleep. If neither the LCD controller nor the
Timer/Counter2 is using the synchronous clock, the clock source is stopped during sleep. Note
that even if the synchronous clock is running in Power-save, this clock is only available for the
LCD controller and Timer/Counter2.
When the SM2..0 bits are 110 and an external crystal/resonator clock option is selected, the
SLEEP instruction makes the MCU enter Standby mode. This mode is identical to Power-down
with the exception that the Oscillator is kept running. From Standby mode, the device wakes up
in six clock cycles.
The Power Reduction Register (PRR), see
vides a method to stop the clock to individual peripherals to reduce power consumption. The
current state of the peripheral is frozen and the I/O registers can not be read or written.
Resources used by the peripheral when stopping the clock will remain occupied, hence the
peripheral should in most cases be disabled before stopping the clock. Waking up a module,
which is done by clearing the bit in PRR, puts the module in the same state as before shutdown.
Module shutdown can be used in Idle mode and Active mode to significantly reduce the overall
power consumption. See
sleep modes, the clock is already stopped.
”Supply Current of I/O modules” on page 343
”PRR – Power Reduction Register” on page
ATmega169P
for examples. In all other
45, pro-
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