Datasheet

168
7734Q–AVR–02/12
AT90PWM81/161
13.18 PSCR Input Mode 14: Fixed Frequency Edge Retrigger PSCR and Deactivate Output
Figure 13-30. PSCR behavior versus PSCr Input A in Mode 14.
The output frequency is not modified by the occurrence of significative edge of retriggering input.
Figure 13-31. PSCR behavior versus PSCr Input B in Mode 14.
The output is deactivated while retriggering input is active.
The output of the PSCR is set to an inactive state and the corresponding ramp is not aborted.
The output stays in an inactive state while the Retrigger/Fault input is active. The PSCR runs at
constant frequency.
13.18.1 Available Input Mode according to Running Mode
Some Input Modes are not consistent with some Running Modes. So Table 13-6 gives the input
modes which are valid according to running modes.
PSCOUTn0
PSCOUTn1
DT0
OT0
DT1 OT1
DT0 OT0 DT0 OT0
DT1 OT1 DT1 OT1
DT0 OT0
DT1 OT1
PSCn Input A
PSCOUTn0
PSCOUTn1
DT0 OT 0
DT1
OT 1
DT0 OT0 DT0 OT0
DT1 OT1 DT1 OT1
DT0 OT0
DT1 OT1
PSCn Input B
Table 13-6. Available input modes according to running modes.
Input mode number: 1 Ramp mode 2 Ramp mode 4 Ramp mode
1 Valid Valid Valid
2 Do not use Valid Valid
3 Do not use Valid Valid
4 Valid Valid Valid
5 Do not use Valid Valid
6 Do not use Valid Valid
7 Valid Valid Valid
8 Valid Valid Valid
9 Valid Valid Valid