Contents
I/O Interfacing.......................................................................................................56
Timer Program Example.......................................................................................57
Time Base ..........................................................................................57
Pulse Width Modulator .....................................................................58
PWM Operation....................................................................................................58
6+2 PWM Mode ...................................................................................................59
7+1 PWM Mode ...................................................................................................60
PWM Output Control ............................................................................................61
PWM Programming Example ...............................................................................61
Analog to Digital Converter..............................................................62
A/D Overview .......................................................................................................62
A/D Converter Data Registers - ADRL, ADRH.....................................................63
A/D Converter Control Registers - ADCR, ACSR, ANCSR ..................................63
A/D Operation.......................................................................................................66
A/D Input Pins ......................................................................................................67
Summary of A/D Conversion Steps ......................................................................68
Programming Considerations ...............................................................................70
A/D Transfer Function...........................................................................................70
A/D Programming Example ..................................................................................71
Operational Amplifiers......................................................................72
Comparator & Operational Amplifier Registers .....................................................72
Operational Amplifier Operation............................................................................72
Operational Amplifier Application Example ...........................................................76
Operational Amplifier Offset Cancellation Function...............................................83
Comparator........................................................................................84
Comparator Functions..........................................................................................84
Interrupts............................................................................................86
Interrupt Register..................................................................................................86
Interrupt Operation ...............................................................................................88
Interrupt Priority.....................................................................................................90
External Interrupt..................................................................................................91
Timer/Event Counter Interrupt ..............................................................................91
A/D Converter Interrupt ........................................................................................91
Time Base Interrupt ..............................................................................................91
Multi-function Interrupt..........................................................................................92
Programming Considerations ...............................................................................92
SCOM Function for LCD ...................................................................92
LCD Operation .....................................................................................................92
LCD Bias Control..................................................................................................93
Configuration Options ......................................................................94
Application Circuits ..........................................................................94
Rev. 1.00
iv
March 3, 2011
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
