ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 166

• Manufacturer Part Number: ATmega32U4
• Manufacturer: Atmel Corporation

Specifications of ATmega32U4

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 14
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 26
• Ext Interrupts: 13
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 3.3
• 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: 12
• Input Capture Channels: 2
• Pwm Channels: 8
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

15.12.3
7766F–AVR–11/10
TCCR4C – Timer/Counter4 Control Register C
Table 15-14. Division factors of the Dead Time prescaler
• Bits 3 .. 0 - CS43, CS42, CS41, CS40: Clock Select Bits 3, 2, 1, and 0
The Clock Select bits 3, 2, 1, and 0 define the prescaling source of Timer/Counter4.
Table 15-15. Timer/Counter4 Prescaler Select
The Stop condition provides a Timer Enable/Disable function.
• Bits 7,6 - COM4A1S, COM4A0S: Comparator A Output Mode, Bits 1 and 0
These bits are the shadow bits of the COM4A1 and COM4A0 bits that are described in the sec-
tion
Bit
Read/Write
Initial value
DTPS41
0
0
1
1
CS43
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
“TCCR4A – Timer/Counter4 Control Register A” on page
CS42
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
COM4A1S COM4A0S COM4B1S COMAB0S
R/W
7
0
CS41
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
DTPS40
0
1
0
1
R/W
CS40
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
6
0
Asynchronous Clocking Mode
T/C4 stopped
PCK
PCK/2
PCK/4
PCK/8
PCK/16
PCK/32
PCK/64
PCK/128
PCK/256
PCK/512
PCK/1024
PCK/2048
PCK/4096
PCK/8192
PCK/16384
Prescaler divides the T/C4 clock by
1x (no division)
2x
4x
8x
R/W
5
0
R/W
4
0
COM4D1
R/W
3
0
COM4D0
162.
R/W
2
0
ATmega16/32U4
Synchronous Clocking Mode
T/C4 stopped
CK
CK/2
CK/4
CK/8
CK/16
CK/32
CK/64
CK/128
CK/256
CK/512
CK/1024
CK/2048
CK/4096
CK/8192
CK/16384
FOC4D
R/W
1
0
PWM4D
R/W
0
0
TCCR4C
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