Datasheet

160
7734Q–AVR–02/12
AT90PWM81/161
- In 2- or 4-ramp mode, PSCr Input A is taken into account only during Dead-Time0 and On-
Time0 period (respectively Dead-Time1 and On-Time1 for PSCr Input B).
- In 1-ramp-mode PSCR Input A or PSCR Input B act on the whole ramp.
13.8.4.3 Input Mode Operation
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 13-5.
Note: All the following examples are given with rising edge or high level active inputs.
Table 13-5. PSCR input mode operation.
PRFM3:0 Description
0 0000b
PSCr Input has no action on PSCR output
1 0001b
See “PSCR Input Mode 1: Stop signal, Jump to Opposite Dead-Time and
Wait” on page 161.
2 0010b
See “PSCR Input Mode 2: Stop signal, Execute Opposite Dead-Time and
Wait” on page 162.
3 0011b
See “PSCR Input Mode 3: Stop signal, Execute Opposite while Fault
active” on page 163.
4 0100b
See “PSCR Input Mode 4: Deactivate outputs without changing timing” on
page 164.
5 0101b
See “PSCR Input Mode 5: Stop signal and Insert Dead-Time” on page
164.
6 0110b
See “PSCR Input Mode 6: Stop signal, Jump to Opposite Dead-Time and
Wait” on page 165.
7 0111b
See “PSCR Input Mode 7: Halt PSCR and Wait for Software Action” on
page 165.
8 1000b
See “PSCR Input Mode 8: Edge Retrigger PSC” on page 166.
9 1001b
See “PSCR Input Mode 9: Fixed Frequency Edge Retrigger PSC” on
page 167.
10 1010b
Reserved: Do not use
11 1011b
12 1100b
13 1101b
14 1110b
See “PSCR Input Mode 14: Fixed Frequency Edge Retrigger PSCR and
Deactivate Output” on page 168.
15 1111b
Reserved: Do not use