BH67F2470
Glucose Meter Flash MCU with LCD
Input/Output Ports......................................................................................... 71
Pull-high Resistors ................................................................................................................ 71
Port A Wake-up ..................................................................................................................... 72
I/O Port Control Registers..................................................................................................... 72
Source Current Selection...................................................................................................... 73
Pin-shared Functions ............................................................................................................ 75
I/O Pin Structures.................................................................................................................. 82
Programming Considerations................................................................................................ 82
Timer Modules – TM ...................................................................................... 83
Introduction ........................................................................................................................... 83
TM Operation ........................................................................................................................ 83
TM Clock Source................................................................................................................... 83
TM Interrupts......................................................................................................................... 83
TM External Pins................................................................................................................... 84
TM Input/Output Pin Control Register................................................................................... 84
Programming Considerations................................................................................................ 85
Standard Type TM – STM .............................................................................. 86
Standard TM Operation......................................................................................................... 86
Standard Type TM Register Description ............................................................................... 86
Standard Type TM Operation Modes.................................................................................... 91
Periodic Type TM – PTM ............................................................................. 101
Periodic TM Operation ....................................................................................................... 101
Periodic Type TM Register Description .............................................................................. 101
Periodic Type TM Operating Modes ................................................................................... 106
Internal Reference Voltage Generator ........................................................115
VIREF Voltage Register Description .......................................................................................115
Digital to Analog Converter – DAC..............................................................116
D/A Converter Registers ......................................................................................................116
Operational Amplifier – OPA........................................................................117
OPA Register Description.....................................................................................................117
Offset Calibration Procedure................................................................................................118
Analog to Digital Converter – ADC..............................................................119
A/D Converter Overview ......................................................................................................119
A/D Converter Register Description.................................................................................... 120
A/D Converter Operation .................................................................................................... 122
A/D Converter Reference Voltage....................................................................................... 123
A/D Converter Input Signals................................................................................................ 123
Conversion Rate and Timing Diagram ................................................................................ 124
Summary of A/D Conversion Steps .................................................................................... 125
Programming Considerations.............................................................................................. 126
A/D Conversion Function .................................................................................................... 126
A/D Conversion Programming Examples............................................................................ 126
Rev. 1.80
4
June 14, 2023
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