Datasheet

120
7734Q–AVR–02/12
AT90PWM81/161
- 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.
12.8.4.3 Input Mode Operation
Thanks to 4 configuration bits (PRFM3:0), it’s possible to define the mode of the PSC input.
Thanks to four configuration bits (PRFM3:0), it is possible to define all the modes of the PSCR
input. These modes are listed in Table 12-7.
Note: All following examples are given with rising edge or high level active inputs.
Table 12-7. PSC input mode operation.
PRFM3:0 Description
0 0000b
PSCn input has no action on PSC output
1 0001b
See “PSC Input Mode 1: Stop signal, Jump to Opposite Dead-Time and
Wait” on page 121.
2 0010b
See “PSC Input Mode 2: Stop signal, Execute Opposite Pulse and Wait”
on page 122.
3 0011b
See “PSC Input Mode 3: Stop signal, Execute Opposite Pulse while Fault
active” on page 123.
4 0100b
See “PSC Input Mode 4: Deactivate outputs without changing timing” on
page 124.
5 0101b
See “PSC Input Mode 5: Stop signal and Insert Dead-Time” on page 124.
6 0110b
See “PSC Input Mode 6: Stop signal, Jump to Opposite Dead-Time and
Wait” on page 125.
7 0111b
See “PSC Input Mode 7: Halt PSC and Wait for Software Action” on page
125.
8 1000b
See “PSC Input Mode 8: Edge Retrigger PSC” on page 126.
9 1001b
See “PSC Input Mode 9: Fixed Frequency Edge Retrigger PSC” on page
127.
10 1010b
Reserved: Do not use
11 1011b
12 1100b
13 1101b
14 1110b
See “PSC Input Mode 14: Fixed Frequency Edge Retrigger PSC and
Deactivate Output” on page 128.
15 1111b
Reserved: Do not use