BA45F6742
CO/GAS Detector Flash MCU
with LED Driver and Calendar
Reset and Initialisation.......................................................................................66
Reset Functions ..........................................................................................................................66
Reset Initial Conditions ...............................................................................................................67
Input/Output Ports..............................................................................................71
Pull-high Resistors ......................................................................................................................71
Port A Wake-up ...........................................................................................................................72
I/O Port Control Registers...........................................................................................................72
I/O Port Source Current Selection...............................................................................................72
Pin-shared Functions ..................................................................................................................74
I/O Pin Structures........................................................................................................................79
Programming Considerations......................................................................................................79
Timer Modules – TM ...........................................................................................80
Introduction .................................................................................................................................80
TM Operation ..............................................................................................................................80
TM Clock Source.........................................................................................................................81
TM Interrupts...............................................................................................................................81
TM External Pins.........................................................................................................................81
Programming Considerations......................................................................................................82
Standard Type TM – STM ...................................................................................83
Standard TM Operation...............................................................................................................83
Standard Type TM Register Description .....................................................................................83
Standard Type TM Operation Modes..........................................................................................88
Periodic Type TM – PTM.....................................................................................98
Periodic TM Operation ...............................................................................................................98
Periodic Type TM Register Description ......................................................................................98
Periodic Type TM Operating Modes..........................................................................................104
Voltage Regulator – LDO.................................................................................. 116
CO/Gas Detector AFE....................................................................................... 117
CO/Gas Detector AFE Registers............................................................................................... 117
Input Offset Calibration ............................................................................................................120
CO/Gas Detector AFE Application Description .........................................................................120
Analog to Digital Converter ............................................................................121
A/D Converter Overview ...........................................................................................................121
Register Descriptions................................................................................................................122
A/D Converter Operation ..........................................................................................................126
A/D Converter Reference Voltage.............................................................................................127
A/D Converter Input Signals......................................................................................................128
Conversion Rate and Timing Diagram ......................................................................................128
Summary of A/D Conversion Steps...........................................................................................129
Programming Considerations....................................................................................................130
A/D Conversion Function ..........................................................................................................130
Temperature Measurement Function ........................................................................................131
A/D Conversion Programming Examples..................................................................................131
Rev. 1.40
4
July 25, 2023
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