AT90PWM2B-16SU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT90PWM2B-16SU

8-bit Atmel Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

AT90PWM2/3/2B/3B

16.3.1

PSC2 Distinctive Feature

Figure 16-2. PSC2 versus PSC1&PSC0 Block Diagram

PSC Counter

=

OCRnRB

=

OCRnSB

=

OCRnRA

=

OCRnSA

PICRn

PSCOUTn3

Waveform

Generator B

PSC Input

Module B

POS23

PSCn Input B

PSCOUTn1

( From Analog

Comparator n Ouput )

Output

Part A Matrix

PSC Input

Module A

PISELnB

PSCn Input A

PISELnA

Waveform

Generator A

POS22

PSCINn

PSCOUTn2

PSCOUTn0

Part B

PCNFn

PCTLn

PFRCnB

PFRCnA

POM2(PSC2 only)

PSOCn

16.3.2

Note: n = 2

PSC2 has two supplementary outputs PSCOUT22 and PSCOUT23. Thanks to a first selector

PSCOUT22 can duplicate PSCOUT20 or PSCOUT21. Thanks to a second selector PSCOUT23

can duplicate PSCOUT20 or PSCOUT21.

The Output Matrix is a kind of 2*2 look up table which gives the possibility to program the output

values according to a PSC sequence (See “Output Matrix” on page 159.)

Output Polarity

The polarity “active high” or “active low” of the PSC outputs is programmable. All the timing dia-

grams in the following examples are given in the “active high” polarity.

4317K–AVR–03/2013

133

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