7540 datasheet(6/366 Pages) RENESAS

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7540 Group

Table of contents

CHAPTER 1 HARDWARE

DESCRIPTION ................................................................................................................................ 1-2

FEATURES ...................................................................................................................................... 1-2

APPLICATION ................................................................................................................................ 1-2

PIN CONFIGURATION .................................................................................................................. 1-3

FUNCTIONAL BLOCK .................................................................................................................. 1-5

PIN DESCRIPTION ........................................................................................................................ 1-8

GROUP EXPANSION .................................................................................................................... 1-9

FUNCTIONAL DESCRIPTION .................................................................................................... 1-11

Central Processing Unit (CPU) ............................................................................................ 1-11

Memory .................................................................................................................................... 1-15

I/O Ports .................................................................................................................................. 1-17

Interrupts ................................................................................................................................. 1-21

Key Input Interrupt (Key-On Wake-Up) ............................................................................... 1-23

Timers ...................................................................................................................................... 1-24

Serial I/O ................................................................................................................................. 1-35

A/D Converter ......................................................................................................................... 1-41

Watchdog Timer ..................................................................................................................... 1-42

Reset Circuit ........................................................................................................................... 1-43

Clock Generating Circuit ....................................................................................................... 1-45

NOTES ON PROGRAMMING ..................................................................................................... 1-49

Processor Status Register .................................................................................................... 1-49

Interrupts ................................................................................................................................. 1-49

Decimal Calculations .............................................................................................................. 1-49

Ports ......................................................................................................................................... 1-49

A/D Conversion ....................................................................................................................... 1-49

Instruction Execution Timing ................................................................................................. 1-49

CPU Mode Register ............................................................................................................... 1-49

State Transition ...................................................................................................................... 1-49

NOTES ON HARDWARE ............................................................................................................ 1-49

Handling of Power Source Pin ............................................................................................. 1-49

One Time PROM Version ..................................................................................................... 1-49

NOTES ON PERIPHERAL FUNCTIONS .................................................................................. 1-50

s Interrupt ............................................................................................................................... 1-50

s Timers .................................................................................................................................. 1-50

s Timer A ............................................................................................................................... 1-50

s Timer X ............................................................................................................................... 1-50

s Timer Y: Programmable Generation Waveform Mode .................................................. 1-50

s Timer Z: Programmable Waveform Generation Mode .................................................. 1-50

s Timer Z: Programmable One-shot Generation Mode ................................................... 1-51

s Timer Z: Programmable Wait One-shot Generation Mode .......................................... 1-51

s Serial I/O ............................................................................................................................. 1-51

s A/D Converter ..................................................................................................................... 1-51

s Notes on Clock Generating Circuit ................................................................................. 1-52

s Notes on Power Source Volage ...................................................................................... 1-52

s Electric Characteristic Differences Among Mask ROM and One Time PROM Version MCUs .... 1-52

DATA REQUIRED FOR MASK ORDERS ................................................................................ 1-53

DATA REQUIRED FOR ROM PROGRAMMING ORDERS .................................................... 1-53

ROM PROGRAMMING METHOD .............................................................................................. 1-53

FUNCTIONAL DESCRIPTION SUPPLEMENT ......................................................................... 1-54

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