S32K144 comparator

mogilipuri_harish — Tue, 13 Jun 2023 04:32:18 GMT

hello

we are using the S32k144 uC 64 pin package. we are planning to use analog comparator.

1.can you please tell me which we can use for comparator INP and INM.

2.please provide the hardware connection for comparator in uC(example)?

3.please provide the detailed application note for comparator?

4.which pins we can use for generating the 16kHz PWM and which pins we can use to generate the PWM?

Re: S32K144 comparator

Robin_Shen — Wed, 14 Jun 2023 03:43:33 GMT

It is recommended that you read Chapter 45 Comparator (CMP) of S32K1xx MCU Family - Reference Manual

1. The Analog MUX (ANMUX) provides a circuit for selecting an analog input signal from eight channels. One signal is provided by the 8-bit digital-to-analog converter (DAC). So CMP0_IN0-CMP0_IN7 and DAC output can be used for comparator INP and INM.

2. Connect the external signal to the selected pin of CMP0_IN0-CMP0_IN7. There is a S32K1 SDK sample cmp_dac_s32k144 for your reference. The example documentation can be found in the S32 SDK documentation at Examples and Demos section. (<SDK_PATH>/doc/Start_Here.html)

You can also refer to Example S32K144 CMP Round-robin S32DS2.0

3. I did not find the application note for S32K1 CMP. Please read Chapter 45 Comparator (CMP) of S32K1xx MCU Family - Reference Manual

Q4. Which pins we can use for generating the 16kHz PWM and which pins we can use to generate the PWM?
A4. Do you want to use CMP to generate PWM? If it has nothing to do with the CMP topic, then please read Chapter 47 FlexTimer Module (FTM) and refer to the FTM example in the S32K1 SDK.

Best Regards,
Robin
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Re: S32K144 FTM PWM Generation

mogilipuri_harish — Wed, 14 Jun 2023 17:17:41 GMT

we are planning to generate the 16 kHZ PWM signals when ADC pins detect the 4V.

can we implement this kind of logic on uC? if it possible can you tell me how to do that ??

can you provide one example?

topic S32K144 comparator in S32K

S32K144 comparator

Re: S32K144 comparator

Re: S32K144 FTM PWM Generation