ATmega16U2 Atmel Corporation, ATmega16U2 Datasheet - Page 135

• Manufacturer Part Number: ATmega16U2
• Manufacturer: Atmel Corporation

Specifications of ATmega16U2

• Flash (kbytes): 16 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: 21
• 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): 0.5
• Eeprom (bytes): 512
• 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

16.11.5
16.11.6
16.11.7
16.11.8
16.11.9
7799D–AVR–11/10
OCR1AH and OCR1AL – Output Compare Register 1 A
OCR1BH and OCR1BL – Output Compare Register 1 B
OCR1CH and OCR1CL – Output Compare Register 1 C
ICR1H and ICR1L – Input Capture Register 1
TIMSK1 – Timer/Counter1 Interrupt Mask Register
The Output Compare Registers contain a 16-bit value that is continuously compared with the
counter value (TCNTn). A match can be used to generate an Output Compare interrupt, or to
generate a waveform output on the OCnx pin.
The Output Compare Registers are 16-bit in size. To ensure that both the high and low bytes are
written simultaneously when the CPU writes to these registers, the access is performed using an
8-bit temporary High Byte Register (TEMP). This temporary register is shared by all the other
16-bit registers.
IThe Input Capture is updated with the counter (TCNTn) value each time an event occurs on the
ICPn pin (or optionally on the Analog Comparator output for Timer/Counter1). The Input Capture
can be used for defining the counter TOP value.
The Input Capture Register is 16-bit in size. To ensure that both the high and low bytes are read
simultaneously when the CPU accesses these registers, the access is performed using an 8-bit
temporary High Byte Register (TEMP). This temporary register is shared by all the other 16-bit
registers.
Bit
(0x89)
(0x88)
Read/Write
Initial Value
Bit
(0x8B)
(0x8A)
Read/Write
Initial Value
Bit
(0x8D)
(0x8C)
Read/Write
Initial Value
Bit
(0x87)
(0x86)
Read/Write
Initial Value
Bit
(0x6F)
Read/Write
Initial Value
See “Accessing 16-bit Registers” on page 110.
See “Accessing 16-bit Registers” on page 110.
R/W
R/W
R/W
R/W
R
7
0
7
0
7
0
7
0
7
–
0
R/W
R/W
R/W
R/W
R
6
0
6
0
6
0
6
0
6
–
0
ICIE1
R/W
R/W
R/W
R/W
R/W
5
0
5
0
5
0
5
0
5
0
R/W
R/W
R/W
R/W
R
4
–
0
4
OCR1A[15:8]
0
4
OCR1B[15:8]
0
4
OCR1C[15:8]
0
4
0
OCR1A[7:0]
OCR1B[7:0]
OCR1C[7:0]
ICR1[15:8]
ICR1[7:0]
ATmega8U2/16U2/32U2
OCIE1C
R/W
R/W
R/W
R/W
R/W
3
0
3
0
3
0
3
0
3
0
OCIE1B
R/W
R/W
R/W
R/W
R/W
2
0
2
0
2
0
2
0
2
0
OCIE1A
R/W
R/W
R/W
R/W
R/W
1
0
1
0
1
0
1
0
1
0
TOIE1
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
0
0
OCR1AH
OCR1BH
OCR1CH
OCR1AL
OCR1BL
OCR1CL
TIMSK1
ICR1H
ICR1L
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