AT90CAN32 Atmel Corporation, AT90CAN32 Datasheet - Page 165
AT90CAN32
Manufacturer Part Number
AT90CAN32
Description
Manufacturer
Atmel Corporation
Specifications of AT90CAN32
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 85
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
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15. Output Compare Modulator - OCM
15.1
15.2
7679H–CAN–08/08
Overview
Description
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
Timer/Counter 1
Timer/Counter 0
(Figure
“16-bit Timer/Counter (Timer/Counter1 and Timer/Counter3)”
15-1).
OC1C
OC0A
AT90CAN32/64/128
99.
Figure
OC0A / OC1C / PB7
15-2. The schematic
Pin
165
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