AT90CAN32 Automotive Atmel Corporation, AT90CAN32 Automotive Datasheet - Page 164

• Manufacturer Part Number: AT90CAN32 Automotive
• Manufacturer: Atmel Corporation

Specifications of AT90CAN32 Automotive

• Flash (kbytes): 32 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: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Can: 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: No
• 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 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

15. Output Compare Modulator - OCM
15.1
15.2
164
Overview
Description
AT90CAN32/64/128
Many register and bit references in this section are written in general form.
The Output Compare Modulator (OCM) allows generation of waveforms modulated with a carrier
frequency. The modulator uses the outputs from the Output Compare Unit C of the 16-bit
Timer/Counter1 and the Output Compare Unit of the 8-bit Timer/Counter0. For more details
about these Timer/Counters see
on page 113
Figure 15-1. Output Compare Modulator, Block Diagram
When the modulator is enabled, the two output compare channels are modulated together as
shown in the block diagram
The Output Compare unit 1C and Output Compare unit 0A shares the PB7 port pin for output.
The outputs of the Output Compare units (OC1C and OC0A) overrides the normal PORTB7
Register when one of them is enabled (i.e., when COMnx1:0 is not equal to zero). When both
OC1C and OC0A are enabled at the same time, the modulator is automatically enabled.
When the modulator is enabled the type of modulation (logical AND or OR) can be selected by
the PORTB7 Register. Note that the DDRB7 controls the direction of the port independent of the
COMnx1:0 bit setting.
The functional equivalent schematic of the modulator is shown on
includes part of the Timer/Counter units and the port B pin 7 output driver circuit.
• A lower case “n” replaces the Timer/Counter number, in this case 0 and 1. However, when
• A lower case “x” replaces the Output Compare unit channel, in this case A or C. However,
using the register or bit defines in a program, the precise form must be used, i.e., TCNT0 for
accessing Timer/Counter0 counter value and so on.
when using the register or bit defines in a program, the precise form must be used, i.e.,
OCR0A for accessing Timer/Counter0 output compare channel A value and so on.
and
“8-bit Timer/Counter0 with PWM” on page
(Figure
“16-bit Timer/Counter (Timer/Counter1 and Timer/Counter3)”
15-1).
99.
Figure
15-2. The schematic
7682C–AUTO–04/08