
Table of Contents
LH77790B User’s Guide
viii
Register Description...................................................................................................8-7
SIR Control Register (SIR_CTLR)..........................................................................8-7
IrDA Clock..................................................................................................................8-7
DASK Clocks..............................................................................................................8-7
Power Management Mode.........................................................................................8-7
Chapter 9 Pulse Width Modulator (PWM)
Introduction.................................................................................................................9-1
PWM Definition...........................................................................................................9-1
Features.....................................................................................................................9-2
PWM Applications......................................................................................................9-2
Functional Block Diagram ..........................................................................................9-3
External Interface.......................................................................................................9-3
Register Map..............................................................................................................9-4
General Operation......................................................................................................9-5
Normal Mode..........................................................................................................9-5
Example: ............................................................................................................9-5
Synchronous Mode ................................................................................................9-6
Example: ............................................................................................................9-7
Power Management...................................................................................................9-7
Status During Reset...................................................................................................9-8
PWM Pulse Frequency and Duty Cycle.....................................................................9-8
Example .............................................................................................................9-8
Register Description...................................................................................................9-9
Clock Divider Registers [PWMn_DIV (n = 0, 1, 2)].................................................9-9
Terminal Count Registers [PWMn_TC (n = 0, 1, 2)].............................................9-10
Duty Cycle Registers [PWMn_DC (n = 0, 1, 2)] ...................................................9-11
Output Invert Registers [PWMn_INV (n = 0, 1, 2)]...............................................9-12
Enable Registers [PWMn_ENB (n = 0, 1, 2)] .......................................................9-13
Synchronous Registers [PWMn_SYNC (n = 0, 1, 2)]...........................................9-13
PWM Connection to On-Chip Counter/Timers.........................................................9-14
PWM Programming Examples.................................................................................9-14
(1) Static Programming (PWM is not running)......................................................9-14
Assumption.......................................................................................................9-14
(2) Dynamic Programming (PWM is running).......................................................9-14
Assumption:......................................................................................................9-14
(3) Synchronous Mode Programming ..................................................................9-15
Assumptions:....................................................................................................9-15
(4) Synchronous Mode Programming ..................................................................9-16
Assumptions:....................................................................................................9-16
Programming Rules (n = 0, 1, 2, A)......................................................................9-16
Chapter 10 LCD Controller
Introduction...............................................................................................................10-1
Features...................................................................................................................10-1
Block Diagram..........................................................................................................10-2
External Interface.....................................................................................................10-2