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ATmega32U2 Datasheet(PDF) 135 Page - ATMEL Corporation

Part # ATmega32U2
Description  8-bit Microcontroller with 8/16/32K Bytes of ISP Flash and USB Controller
PDF  314 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega32U2 Datasheet(HTML) 135 Page - ATMEL Corporation

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135
7799B–AVR–07/09
ATmega8U2/16U2/32U2
16.11.5
OCR1AH and OCR1AL – Output Compare Register 1 A
16.11.6
OCR1BH and OCR1BL – Output Compare Register 1 B
16.11.7
OCR1CH and OCR1CL – Output Compare Register 1 C
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. See “Accessing 16-bit Registers” on page 110.
16.11.8
ICR1H and ICR1L – Input Capture Register 1
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. See “Accessing 16-bit Registers” on page 110.
16.11.9
TIMSK1 – Timer/Counter1 Interrupt Mask Register
Bit
76543210
(0x89)
OCR1A[15:8]
OCR1AH
(0x88)
OCR1A[7:0]
OCR1AL
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
00000000
Bit
76543210
(0x8B)
OCR1B[15:8]
OCR1BH
(0x8A)
OCR1B[7:0]
OCR1BL
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
00000000
Bit
76543210
(0x8D)
OCR1C[15:8]
OCR1CH
(0x8C)
OCR1C[7:0]
OCR1CL
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
00000000
Bit
76543210
(0x87)
ICR1[15:8]
ICR1H
(0x86)
ICR1[7:0]
ICR1L
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
00000000
Bit
7
6
543
2
1
0
(0x6F)
–
–ICIE1
–
OCIE1C
OCIE1B
OCIE1A
TOIE1
TIMSK1
Read/Write
R
R
R/W
R
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0



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