
TABLE OF CONTENTS
S1C33205 TECHNICAL MANUAL
EPSON
v
III PERIPHERAL BLOCK
III-1 INTRODUCTION.............................................................................................B-III-1-1
III-2 PRESCALER..................................................................................................B-III-2-1
Configuration of Prescaler ..............................................................................................................................B-III-2-1
Source Clock........................................................................................................................................................B-III-2-1
Selecting Division Ratio and Output Control for Prescaler................................................................B-III-2-2
Source Clock Output to 8-Bit Programmable Timer..............................................................................B-III-2-2
I/O Memory of Prescaler .................................................................................................................................B-III-2-3
Programming Notes ..........................................................................................................................................B-III-2-8
III-3 8-BIT PROGRAMMABLE TIMERS ..................................................................B-III-3-1
Configuration of 8-Bit Programmable Timer.............................................................................................B-III-3-1
Output Pins of 8-Bit Programmable Timers..............................................................................................B-III-3-1
Uses of 8-Bit Programmable Timers...........................................................................................................B-III-3-2
Control and Operation of 8-Bit Programmable Timer...........................................................................B-III-3-4
Control of Clock Output ...................................................................................................................................B-III-3-7
8-Bit Programmable Timer Interrupts and DMA .....................................................................................B-III-3-8
I/O Memory of 8-Bit Programmable Timers...........................................................................................B-III-3-10
Programming Notes .......................................................................................................................................B-III-3-17
III-4 16-BIT PROGRAMMABLE TIMERS ................................................................B-III-4-1
Configuration of 16-Bit Programmable Timer ..........................................................................................B-III-4-1
I/O Pins of 16-Bit Programmable Timers...................................................................................................B-III-4-2
Uses of 16-Bit Programmable Timers.........................................................................................................B-III-4-3
Control and Operation of 16-Bit Programmable Timer ........................................................................B-III-4-4
Controlling Clock Output .................................................................................................................................B-III-4-7
16-Bit Programmable Timer Interrupts and DMA...................................................................................B-III-4-9
I/O Memory of 16-Bit Programmable Timers........................................................................................B-III-4-12
Programming Notes .......................................................................................................................................B-III-4-25
III-5 WATCHDOG TIMER .......................................................................................B-III-5-1
Configuration of Watchdog Timer ................................................................................................................B-III-5-1
Control of Watchdog Timer ............................................................................................................................B-III-5-1
Operation in Standby Modes.........................................................................................................................B-III-5-2
I/O Memory of Watchdog Timer ...................................................................................................................B-III-5-3
Programming Notes ..........................................................................................................................................B-III-5-3
III-6 LOW-SPEED (OSC1) OSCILLATION CIRCUIT................................................ B-III-6-1
Configuration of Low-Speed (OSC1) Oscillation Circuit......................................................................B-III-6-1
I/O Pins of Low-Speed (OSC1) Oscillation Circuit.................................................................................B-III-6-1
Oscillator Types..................................................................................................................................................B-III-6-2
Controlling Oscillation.......................................................................................................................................B-III-6-3
Switching Over the CPU Operating Clock.................................................................................................B-III-6-3
Power-Control Register Protection Flag....................................................................................................B-III-6-4
Operation in Standby Mode...........................................................................................................................B-III-6-4
OSC1 Clock Output to External Devices ..................................................................................................B-III-6-4
I/O Memory of Low-Speed (OSC1) Oscillation Circuit.........................................................................B-III-6-5
Programming Notes ..........................................................................................................................................B-III-6-8