ATmega32C1 Automotive Atmel Corporation, ATmega32C1 Automotive Datasheet - Page 119

• 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

13.7.1
7647G–AVR–09/11
Compare Output Mode and Waveform Generation
Figure 13-5. Compare Match Output Unit, Schematic
The general I/O port function is overridden by the Output Compare (OCnx) from the Waveform
Generator if either of the COMnx1:0 bits are set. However, the OCnx pin direction (input or
output) is still controlled by the Data Direction Register (DDR) for the port pin. The Data Direc-
tion Register bit for the OCnx pin (DDR_OCnx) must be set as output before the OCnx value is
visible on the pin. The port override function is generally independent of the Waveform Gener-
ation mode, but there are some exceptions. Refer to
for details.
The design of the Output Compare pin logic allows initialization of the OCnx state before the
output is enabled. Note that some COMnx1:0 bit settings are reserved for certain modes of
operation.
The COMnx1:0 bits have no effect on the Input Capture unit.
The Waveform Generator uses the COMnx1:0 bits differently in normal, CTC, and PWM
modes. For all modes, setting the COMnx1:0 = 0 tells the Waveform Generator that no action
on the OCnx Register is to be performed on the next compare match. For compare output
actions in the non-PWM modes refer to
Table 13-2 on page
Table 13-3 on page
A change of the COMnx1:0 bits state will have effect at the first compare match after the bits
are written. For non-PWM modes, the action can be forced to have immediate effect by using
the FOCnx strobe bits.
COMnx1
COMnx0
FOCnx
clk
I/O
See “16-bit Timer/Counter Register Description” on page 130.
130, and for phase correct and phase and frequency correct PWM refer to
131.
Waveform
Generator
Atmel ATmega16/32/64/M1/C1
Table 13-1 on page
D
D
D
PORT
DDR
OCnx
Q
Q
Q
Table
13-1,
130. For fast PWM mode refer to
1
0
Table 13-2
and
OCnx
Table 13-3
Pin
119