19.11.17 TC4 Control Register C
| Name: | TCCR4C |
| Offset: | 0xA2 |
| Reset: | 0x00 |
| Property: | - |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| FOC4A | FOC4B | ||||||||
| Access | R/W | R/W | |||||||
| Reset | 0 | 0 |
Bits 6, 7 – FOC4 Force Output Compare for Channel B and A
The FOCA/FOCB bits are only active when the WGM4[3:0] bits specifies a non-PWM mode. When writing a logical one to the FOC4A/FOC4B bit, an immediate compare match is forced on the Waveform Generation unit. The OC4A/OC4B output is changed according to its COM4x[1:0] bits setting. Note that the FOCA/FOCB bits are implemented as strobes. Therefore it is the value present in the COM4x[1:0] bits that determine the effect of the forced compare.
A FOC4A/FOC4B strobe will not generate any interrupt nor will it clear the timer in Clear Timer on Compare Match (CTC) mode using OCR4A as TOP. The FOC4A/FOC4B bits are always read as zero.