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

16.8.4.3

If PELEVnx bit set, the significant edge of PSCn Input A or B is rising (edge modes) or the active

level is high (level modes) and vice versa for unset/falling/low

- In 2- or 4-ramp mode, PSCn Input A is taken into account only during Dead-Time0 and On-

Time0 period (respectively Dead-Time1 and On-Time1 for PSCn Input B).

- In 1-ramp-mode PSC Input A or PSC Input B act on the whole ramp.

Input Mode Operation

Thanks to 4 configuration bits (PRFM3:0), it’s possible to define the mode of the PSC input.

These modes are listed in Table 16-6 on page 149.

Table 16-6. PSC Input Mode Operation

PRFM3:0

0 0000b

1 0001b

2 0010b

3 0011b

4 0100b

5 0101b

6 0110b

7 0111b

8 1000b

9 1001b

10 1010b

Description

PSCn Input has no action on PSC output

16.9See “PSC Input Mode 1: Stop signal, Jump to Opposite Dead-Time

and Wait” on page 150.

See “PSC Input Mode 2: Stop signal, Execute Opposite Dead-Time and

Wait” on page 151.

See “PSC Input Mode 3: Stop signal, Execute Opposite while Fault

active” on page 152.

See “PSC Input Mode 4: Deactivate outputs without changing timing.” on

page 152.

See “PSC Input Mode 5: Stop signal and Insert Dead-Time” on page 153.

See “PSC Input Mode 6: Stop signal, Jump to Opposite Dead-Time and

Wait.” on page 154.

See “PSC Input Mode 7: Halt PSC and Wait for Software Action” on page

154.

See “PSC Input Mode 8: Edge Retrigger PSC” on page 154.

See “PSC Input Mode 9: Fixed Frequency Edge Retrigger PSC” on page

155.

Reserved : Do not use

11 1011b

12 1100b

13 1101b

14 1110b

15 1111b

See “PSC Input Mode 14: Fixed Frequency Edge Retrigger PSC and Dis-

activate Output” on page 156.

Reserved : Do not use

Notice: All following examples are given with rising edge or high level active inputs.

4317K–AVR–03/2013

149

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