mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 202

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

FlexTimer Module (FTMV1)
Typical usage is to setup the TPM3 channel as an output compare. The sync trigger occurs on the rising
edge of the TPM3 channel, so the “set output on compare” option (TPM3CnSC[ELSnB:ELSnA]=0b11)
must be used.
11.1.1.2
The ACMP1 module can be configured to connect the output of the analog comparator to FTM1 input
capture channel 0 by setting the SOPT2[ACIC1] bit. With ACIC1 set, the FTM1CH0 pin is not available
externally regardless of the configuration of the FTM1 module.
11.1.1.3
The FTM1 module has the capability to send a hardware trigger to the ADC using the
FTM1_ADC_TRIGGER register. FTM1 can be configured to send a trigger on any channel value match
from channels 2-5 (channels 0-1 cannot be used). Multiple channels can be selected at once to generate
multiple triggers to the ADC within one period of the FTM counter.
The ADC hardware trigger is enabled by the ADCSC2[ADTRG] bit. In addition, the hardware trigger
source must be selected with the SOPT2[ADHWTS1:ADHWTS0] bits. ADHWTS1:ADHWTS0 = 0b10
selects the FTM1 as the ADC hardware trigger.
11.1.2
The External Trigger Register (EXTTRIG) is not available in FTM2. The INITTRIGEN bit in
FTM1EXTTRIG is not available.
11-2
Bits in External Trigger Registers (FTMxEXTTRIG)
ACMP1 to FTM1 input capture
FTM1 to ADC Hardware Trigger
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor