AN3077 datasheet(45/82 Pages) STMICROELECTRONICS

номер детали	AN3077

подробное описание детали	Safety application guide

PDF	82 Pages

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производитель	STMICROELECTRONICS [STMicroelectronics]

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AN3077

Functional safety requirements for application software

Figure 14. Double Read Analog Inputs configuration

3.15.1.2.3

Software test implementation

●

ADC0_SWTEST_REGCRC

The ADC_0 configuration registers are read and a CRC checksum is computed. The

checksum is compared to the expected value.

●

ADC1_SWTEST_REGCRC

The ADC_1 configuration registers are read and a CRC checksum is computed. The

checksum is compared to the expected value.

●

SIUL_SWTEST_REGCRC

The SIUL configuration registers are read and a CRC checksum is computed. The

checksum is compared to the expected value.

●

ADC_SWTEST_CMP

This software test is used to execute a comparison between the double acquisition

performed by one channel of ADC_0 and one channel of ADC_1. The comparison

must be approximated because of conversion differences.

3.15.1.2.4

Implementation details

The following hardware elements shall be used for the safety function:

●

Analog input channels AN[0:8] of ADC_0

●

Analog input channels AN[0:8] of ADC_1

The user must select one channel from ADC_0 and one from ADC_1.

The input pads are configured via the appropriate pad configuration registers, SIUL_PCRn.

ADC_0

Analog Double Read

Configuration

AN[0:8]

ADC_1

AN[0:8]

= Input Pad

AN3077 датащи(PDF) 45 Page - STMicroelectronics