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AT90PWM3 Datasheet(PDF) 161 Page - ATMEL Corporation

Part # AT90PWM3
Description  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
PDF  361 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90PWM3 Datasheet(HTML) 161 Page - ATMEL Corporation

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161
4317J–AVR–08/10
AT90PWM2/3/2B/3B
16.25 PSC Register Definition
Registers are explained for PSC0. They are identical for PSC1. For PSC2 only different registers
are described.
16.25.1
PSC 0 Synchro and Output Configuration – PSOC0
16.25.2
PSC 1 Synchro and Output Configuration – PSOC1
16.25.3
PSC 2 Synchro and Output Configuration – PSOC2
• Bit 7 – POS23 : PSCOUT23 Selection (PSC2 only)
When this bit is clear, PSCOUT23 outputs the waveform generated by Waveform Generator B.
When this bit is set, PSCOUT23 outputs the waveform generated by Waveform Generator A.
• Bit 6 – POS22 : PSCOUT22 Selection (PSC2 only)
When this bit is clear, PSCOUT22 outputs the waveform generated by Waveform Generator A.
When this bit is set, PSCOUT22 outputs the waveform generated by Waveform Generator B.
• Bit 5:4 – PSYNCn1:0: Synchronization Out for ADC Selection
Select the polarity and signal source for generating a signal which will be sent to the ADC for
synchronization.
Bit
7
654
3
2
1
0
-
-
PSYNC01
PSYNC00
-
POEN0B
-
POEN0A
PSOC0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
654
3
2
1
0
-
-
PSYNC11
PSYNC10
-
POEN1B
-
POEN1A
PSOC1
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit
7
654
3
2
1
0
POS23
POS22
PSYNC21
PSYNC20
POEN2D
POEN2B
POEN2C
POEN2A
PSOC2
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Table 16-11. Synchronization Source Description in One/Two/Four Ramp Modes
PSYNCn1
PSYNCn0
Description
0
0
Send signal on leading edge of PSCOUTn0 (match with OCRnSA)
01
Send signal on trailing edge of PSCOUTn0 (match with OCRnRA or
fault/retrigger on part A)
1
0
Send signal on leading edge of PSCOUTn1 (match with OCRnSB)
11
Send signal on trailing edge of PSCOUTn1 (match with OCRnRB or
fault/retrigger on part B)



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