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ATMEGA640 Datasheet(PDF) 159 Page - Microchip Technology

Part # ATMEGA640
Description  8-bit Microcontroller with 16/32/64KB In-System Programmable Flash
PDF  436 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

ATMEGA640 Datasheet(HTML) 159 Page - Microchip Technology

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ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
DS40002211A
Modifying the counter (TCNTn) while the counter is running introduces a risk of missing a compare match between
TCNTn and one of the OCRnx Registers.
Writing to the TCNTn Register blocks (removes) the compare match on the following timer clock for all compare
units.
17.11.17 OCR1AH and OCR1AL – Output Compare Register 1 A
17.11.18 OCR1BH and OCR1BL – Output Compare Register 1 B
17.11.19 OCR1CH and OCR1CL – Output Compare Register 1 C
17.11.20 OCR3AH and OCR3AL – Output Compare Register 3 A
17.11.21 OCR3BH and OCR3BL – Output Compare Register 3 B
17.11.22 OCR3CH and OCR3CL – Output Compare Register 3 C
17.11.23 OCR4AH and OCR4AL – Output Compare Register 4 A
Bit
7
65
43
2
1
0
(0x89)
OCR1A[15:8]
OCR1AH
(0x88)
OCR1A[7:0]
OCR1AL
Read/Write
R/WR/W
R/WR/W
R/WR/W
R/WR/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
65
43
2
1
0
(0x8B)
OCR1B[15:8]
OCR1BH
(0x8A)
OCR1B[7:0]
OCR1BL
Read/Write
R/WR/W
R/WR/W
R/WR/W
R/WR/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
65
43
2
1
0
(0x8D)
OCR1C[15:8]
OCR1CH
(0x8C)
OCR1C[7:0]
OCR1CL
Read/Write
R/WR/W
R/WR/W
R/WR/W
R/WR/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
65
43
2
1
0
(0x99)
OCR3A[15:8]
OCR3AH
(0x98)
OCR3A[7:0]
OCR3AL
Read/Write
R/WR/W
R/WR/W
R/WR/W
R/WR/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
65
43
2
1
0
(0x9B)
OCR3B[15:8]
OCR3BH
(0x9A)
OCR3B[7:0]
OCR3BL
Read/Write
R/WR/W
R/WR/W
R/WR/W
R/WR/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
65
43
2
1
0
(0x9D)
OCR3C[15:8]
OCR3CH
(0x9C)
OCR3C[7:0]
OCR3CL
Read/Write
R/WR/W
R/WR/W
R/WR/W
R/WR/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
65
43
2
1
0
(0xA9)
OCR4A[15:8]
OCR4AH



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