
TABLE OF CONTENTS
vi
EPSON
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-6-3
Operation in Standby Mode ..........................................................................................................................B-III-6-4
OSC1 Clock Output to External Devices..................................................................................................B-III-6-4
I/O Memory of Clock Generator...................................................................................................................B-III-6-5
Programming Notes..........................................................................................................................................B-III-6-8
III-7 CLOCK TIMER.................................................................................................B-III-7-1
Configuration of Clock Timer.........................................................................................................................B-III-7-1
Control and Operation of the Clock Timer ...............................................................................................B-III-7-2
Interrupt Function ..............................................................................................................................................B-III-7-4
Examples of Use of Clock Timer .................................................................................................................B-III-7-6
I/O Memory of Clock Timer............................................................................................................................B-III-7-7
Programming Notes........................................................................................................................................B-III-7-12
III-8 SERIAL INTERFACE........................................................................................B-III-8-1
Configuration of Serial Interfaces ................................................................................................................B-III-8-1
Features of Serial Interfaces...........................................................................................................B-III-8-1
I/O Pins of Serial Interface .............................................................................................................................B-III-8-2
Setting Transfer Mode ......................................................................................................................B-III-8-3
Clock-Synchronized Interface.......................................................................................................................B-III-8-4
Outline of Clock-Synchronized Interface....................................................................................B-III-8-4
Setting Clock-Synchronized Interface.........................................................................................B-III-8-5
Control and Operation of Clock-Synchronized Transfer......................................................B-III-8-7
Asynchronous Interface ................................................................................................................................B-III-8-12
Outline of Asynchronous Interface .............................................................................................B-III-8-12
Setting Asynchronous Interface ..................................................................................................B-III-8-13
Control and Operation of Asynchronous Transfer................................................................B-III-8-17
IrDA Interface ....................................................................................................................................................B-III-8-21
Outline of IrDA Interface .................................................................................................................B-III-8-21
Setting IrDA Interface ......................................................................................................................B-III-8-21
Control and Operation of IrDA Interface...................................................................................B-III-8-23
Serial Interface Interrupts and DMA.........................................................................................................B-III-8-24
I/O Memory of Serial Interface....................................................................................................................B-III-8-27
Programming Notes........................................................................................................................................B-III-8-40
III-9 SINGLE MASTER I
2C-BUS ..............................................................................B-III-9-1
Configuration of Single-Master I
2C-BUS...................................................................................................B-III-9-1
Features of the Single-Master I
2C-BUS......................................................................................B-III-9-1
Single-Master I
2C-BUS Input and Output Pins ......................................................................................B-III-9-2
Single-Master I
2C-BUS Settings ..................................................................................................................B-III-9-4
I
2C-BUS Control and Operation...................................................................................................................B-III-9-5
Single-Master I
2C-BUS Interrupts and DMA ...........................................................................................B-III-9-7
Single-Master I
2C-BUS I/O Memory.........................................................................................................B-III-9-10
Programming Note ..........................................................................................................................................B-III-9-25
Noise Filter Overview.......................................................................................................................B-III-9-25