NEC PD75402A Manuale Utente

This manual is intended for user engineers who wish to understand the 

µ

PD75402A’s, 75P402’s functions and

design an application system using them.

The objective of this manual is for the user to understand the 

µ

PD75402A’s, 75P402’s hardware functions shown

below.

This manual is composed roughly of the following contents.

• General description

• Pin functions

• Internal block functions

• Interrupt

• Other internal peripheral functions

• Instruction functions

The reader of this manual must have general knowledge of electricity, logic circuitry and microcomputers.

• Use as the 

µ

PD75P402 manual

→

This manual describes the 

µ

PD75402A as the representative model unless there are particular differences in

functions.  If using it as the 

µ

PD75P402 manual, the 

µ

PD75402A should be read as the 

µ

PD75P402.

• Checking an instruction function with a known mnemonic

→

Appendix D. “Instructions Index (in Alphabetical Order)” should be used.

• Checking an instruction with an unknown mnemonic but with a roughly known function

→

Check the instruction’s mnemonic in 9.2 “Instruction Set and Its Operation” and then check the function in 9.4

“Instruction Functions and Application”.

• Roughly understanding the 

µ

PD75402A’s, 75P402’s functions

→

Follow the contents.

Data notation weight

:

High-order digit on the left, low-order digit on the right

Notation of active low

:

×××

 (line over pin, signal name)

Memory map address

:

Upper__low order, lower__high order

:

Explanation of * in text

:

Supplementary explanation of text

Numeric notation

:

Binary ... 

××××

 or 

××××

B

Decimal ... 

××××

Hexadecimal ... 

××××

H