ATmega32C1 Automotive Atmel Corporation, ATmega32C1 Automotive Datasheet - Page 42

• Manufacturer Part Number: ATmega32C1 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega32C1 Automotive

• Flash (kbytes): 32 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 27
• Ext Interrupts: 27
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 1
• Can: 1
• Lin: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 150
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

6.5
6.6
42
Standby Mode
Power Reduction Register
Atmel ATmega16/32/64/M1/C1
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.
Table 6-2.
Notes:
The Power Reduction Register, PRR, provides a method to stop the clock to individual periph-
erals 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.
A full predictible behaviour of a peripheral is not guaranteed during and after a cycle of stop-
ping and starting of its clock. So its recommended to stop a peripheral before stopping its
clock with PRR register.
Module shutdown can be used in Idle mode and Active mode to significantly reduce the overall
power consumption. In all other sleep modes, the clock is already stopped.
Sleep
Mode
Idle
ADC
Noise
Reduction
Power-do
wn
Standby
1. Only recommended with external crystal or resonator selected as clock source.
2. Only level interrupt.
(1)
Active Clock Domains and Wake-up Sources in the Different Sleep Modes.
Active Clock Domains
X
X
X
X
X
Oscillator
X
X
X
s
X
X
X
X
(2)
(2)
(2)
X
X
Wake-up Sources
X
X
X
X
7647G–AVR–09/11
X
X
X
X
X