UPD78C18 datasheet(21/373 Pages) NEC

21 / 373 page

CHAPTER 1

GENERAL DESCRIPTION

1.1 Features

• 159 types of instructions

• Multiplication/division instructions, 16-bit operation instructions possible

• Minimum instruction execution time

• 0.8

µs (at 15 MHz operation)

• ROM capacity

• 32768

× 8 bits (

µPD78C18/78CP18Note 1)

• 16384

× 8 bits (

µPD78C14, 78C14A, 78CP14Note 1)

•

8192

× 8 bits (

µPD78C12A)

•

4096

× 8 bits (

µPD78C11A)

• ROM-less

(

µPD78C17/78C10A)

• RAM capacityNote 2

•

1024

× 8 bits (

µPD78C18/78CP18/78C17)

•

256

× 8 bits (

µPD78C14/78C14A/78CP14/78C12A/78C11A/78C10A)

• 8-bit resolution A/D converter

• 8 channels

• General-purpose serial interface

• Asynchronous mode

• Synchronous mode

• I/O interface mode

• 16-bit timer/event counter

• 1 channel

• 8-bit timer

• 2 channels

• Interrupt functions (3 external, 8 internal)

• Non-maskable interrupt :

• Maskable interrupts

• 6 priority levels, 6 interrupt addresses

Notes 1.

µPD78CP18/78CP14 have on-chip one-time PROM or EPROM.

On-chip RAM can only be used when the RAE bit of the MM register is "1".

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