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AN4266 Datasheet(PDF) 3 Page - STMicroelectronics

Part # AN4266
Description  Safety application guide for SPC56xL70xx family
PDF  76 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4266 Datasheet(HTML) 3 Page - STMicroelectronics

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AN4266
Contents
Doc ID 024283 Rev 2
3/82
3.13.3
Read Encoder Inputs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.13.4
Write Digital Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.13.5
Write PWM Outputs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.13.6
Other requirements for I/O peripherals . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.14
Cross Triggering Unit (CTU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
3.14.1
Synchronize Sequential Read Input . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
3.15
ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.15.1
Read Analog Inputs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.15.2
Other requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3.16
Temperature sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3.17
Software Watchdog Timer (SWT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3.18
Redundancy Control Checking Unit (RCCU) . . . . . . . . . . . . . . . . . . . . . . 48
3.19
Cyclic Redundancy Checker Unit (CRC) . . . . . . . . . . . . . . . . . . . . . . . . . 49
3.20
Clock Monitor Unit (CMU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3.21
Frequency-Modulated Phase-Locked Loop (FMPLL) . . . . . . . . . . . . . . . 50
3.22
Internal RC Oscillator (IRCOSC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
3.23
Power Management Unit (PMU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
3.24
Memory Protection Unit (MPU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
3.25
Register Protection Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3.26
Error Correction Status Module (ECSM) . . . . . . . . . . . . . . . . . . . . . . . . . 55
3.27
Fault Collection and Control Unit (FCCU) . . . . . . . . . . . . . . . . . . . . . . . . 55
4
Functions of external devices for ASIL D applications . . . . . . . . . . . . 57
4.1
External Watchdog Function (EXWD) . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
4.2
Power Supply and Monitor Function (PSM) . . . . . . . . . . . . . . . . . . . . . . . 57
4.3
Error Out Monitor Function (ERRM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4.3.1
Both FCCU pins connected to external device . . . . . . . . . . . . . . . . . . . 58
4.3.2
Single FCCU pin connected to external device . . . . . . . . . . . . . . . . . . . 59
4.4
PWM Output monitored by external ASIC (PWMA) . . . . . . . . . . . . . . . . . 59
5
Scenarios for automotive applications: Motor control . . . . . . . . . . . . 61
5.1
Application example 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
5.1.1
Functional safety related inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
5.1.2
Functional safety related outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
5.2
Application example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64



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