ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 103
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ATmega32U2
Manufacturer Part Number
ATmega32U2
Description
Manufacturer
Atmel Corporation
Specifications of ATmega32U2
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
22
Ext Interrupts
20
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
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
2
Output Compare Channels
5
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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7799D–AVR–11/10
Table 15-4
rect PWM mode.
Table 15-4.
Note:
• Bits 5:4 – COM0B[1:0]: Compare Match Output B Mode
These bits control the Output Compare pin (OC0B) behavior. If one or both of the COM0B[1:0]
bits are set, the OC0B output overrides the normal port functionality of the I/O pin it is connected
to. However, note that the Data Direction Register (DDR) bit corresponding to the OC0B pin
must be set in order to enable the output driver.
When OC0B is connected to the pin, the function of the COM0B[1:0] bits depends on the
WGM0[2:0] bit setting.
bits are set to a normal or CTC mode (non-PWM).
[
Table 15-5.
Table 15-3
PWM mode.
Table 15-6.
Note:
COM0A1
COM0B1
COM0B1
0
0
1
1
0
0
1
1
0
0
1
1
1. A special case occurs when OCR0A equals TOP and COM0A1 is set. In this case, the Com-
1. A special case occurs when OCR0B equals TOP and COM0B1 is set. In this case, the Com-
shows the COM0A1:0 bit functionality when the WGM0[2:0] bits are set to phase cor-
pare Match is ignored, but the set or clear is done at TOP. See
page 99
pare Match is ignored, but the set or clear is done at TOP. See
for more details.
shows the COM0B[1:0] bit functionality when the WGM0[2:0] bits are set to fast
Compare Output Mode, Phase Correct PWM Mode
Compare Output Mode, non-PWM Mode
Compare Output Mode, Fast PWM Mode
COM0A0
COM0B0
COM0B0
for more details.
0
1
0
1
0
1
0
1
0
1
0
1
Table 15-2
Description
Normal port operation, OC0A disconnected.
WGM02 = 0: Normal Port Operation, OC0A Disconnected.
WGM02 = 1: Toggle OC0A on Compare Match.
Clear OC0A on Compare Match when up-counting. Set OC0A on
Compare Match when down-counting.
Set OC0A on Compare Match when up-counting. Clear OC0A on
Compare Match when down-counting.
Description
Normal port operation, OC0B disconnected.
Toggle OC0B on Compare Match
Clear OC0B on Compare Match
Set OC0B on Compare Match
Description
Normal port operation, OC0B disconnected.
Reserved
Clear OC0B on Compare Match, set OC0B at TOP
Set OC0B on Compare Match, clear OC0B at TOP
shows the COM0A[1:0] bit functionality when the WGM0[2:0]
ATmega8U2/16U2/32U2
(1)
(1)
“Phase Correct PWM Mode” on
“Fast PWM Mode” on page 97
103
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