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ATmega16U4 Datasheet(PDF) 156 Page - ATMEL Corporation

Part # ATmega16U4
Description  8-bit Microcontroller with 16/32K Bytes of ISP Flash and USB Controller
PDF  408 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega16U4 Datasheet(HTML) 156 Page - ATMEL Corporation

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156
7766D–AVR–01/09
ATmega16U4/ATmega32U4
counter value matches the TOP value. The counter is then cleared at the following timer clock
cycle. The TCNT4 value is in the timing diagram shown as a histogram for illustrating the single-
slope operation. The timing diagram includes Output Compare pins OC4A and OC4A, and the
corresponding Output Compare Override Enable bits (OC4OE1..OC4OE0).
Figure 15-15. PWM6 Mode, Single-slope Operation, Timing Diagram
The general I/O port function is overridden by the Output Compare value (OC4x / OC4x) from
the Dead Time Generator if either of the COM4x1:0 bits are set. The Output Compare pins can
also be overridden by the Output Compare Override Enable bits OC4OE5..OC4OE0. If an Over-
ride Enable bit is cleared, the actual value from the port register will be visible on the port pin
and, if the Override Enable bit is set, the Output Compare pin is allowed to be connected on the
port pin. The Output Compare Pin configurations are described in Table 15-5.
Table 15-5.
Output Compare Pin configurations in PWM6 Mode
COM4A1
COM4A0
OC4A Pin (PC6)
OC4A Pin (PC7)
0
0
Disconnected
Disconnected
01OC4A •
OC4OE0
OC4A •
OC4OE1
10OC4A •
OC4OE0
OC4A •
OC4OE1
11OC4A •
OC4OE0
OC4A •
OC4OE1
COM4B1
COM4B0
OC4B Pin (PB5)
OC4B Pin (PB6)
0
0
Disconnected
Disconnected
01OC4A •
OC4OE2
OC4A •
OC4OE3
TCNT4
OC4A Pin
OC4A Pin
OC4B Pin
OC4B Pin
OC4D Pin
OC4D Pin
OC4OE0
OC4OE1
OC4OE2
OC4OE3
OC4OE4
OC4OE5
OCW4A



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