Contents
Timer/Event Counters .......................................................................45
Configuring the Timer/Event Counter Input Clock Source .....................................45
Timer Registers
-
TMR0, TMR1 ...........................................................................45
Timer Control Registers
-
TMR0C, TMR1C..........................................................47
Timer Mode ..........................................................................................................48
Event Counter Mode.............................................................................................49
Pulse Width Capture Mode...................................................................................49
Prescaler ..............................................................................................................50
PFD Function .......................................................................................................50
I/O Interfacing.......................................................................................................51
Timer Program Example.......................................................................................52
Time Base ..........................................................................................52
Pulse Width Modulator .....................................................................53
PWM Operation....................................................................................................53
6+2 PWM Mode ...................................................................................................54
7+1 PWM Mode ...................................................................................................55
PWM Output Control ............................................................................................56
PWM Programming Example ...............................................................................56
Analog to Digital Converter..............................................................57
A/D Overview .......................................................................................................57
A/D Converter Data Registers
-
ADRL, ADRH .....................................................58
A/D Converter Control Registers
-
ADCR, ACSR.................................................58
A/D Input Pins ......................................................................................................61
Summary of A/D Conversion Steps ......................................................................61
Programming Considerations ...............................................................................62
A/D Transfer Function...........................................................................................62
A/D Programming Example ..................................................................................64
Interrupts............................................................................................65
Interrupt Register..................................................................................................65
Interrupt Operation ...............................................................................................65
Interrupt Priority.....................................................................................................67
External Interrupt ..................................................................................................67
Timer/Event Counter Interrupt ..............................................................................69
Time Base Interrupt ..............................................................................................69
Programming Considerations ...............................................................................69
SCOM Function for LCD ...................................................................70
LCD Operation .....................................................................................................70
LCD Bias Control..................................................................................................71
Configuration Options ......................................................................72
Application Circuits ..........................................................................72
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