HD404358H datasheet(6/100 Pages) HITACHI

Part #	HD404358H

Description	4-bit HMCS400-Series microcomputer

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Manufacturer	HITACHI [Hitachi Semiconductor]

Direct Link	http://www.renesas.com/eng

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6 / 100 page

HD404358 Series

6

Memory Map

ROM Memory Map

The ROM memory map is shown in figure 1 and described below.

Vector Address Area ($0000–$000F): Reserved for JMPL instructions that branch to the start addresses

of the reset and interrupt routines. After MCU reset or an interrupt, program execution continues from the

vector address.

Zero-Page Subroutine Area ($0000–$003F): Reserved for subroutines. The program branches to a

subroutine in this area in response to the CAL instruction.

Pattern Area ($0000–$0FFF): Contains ROM data that can be referenced with the P instruction.

Program Area ($0000-$0FFF (HD404354, HD40A4354), $0000–$17FF (HD404356, HD40A4356),

$0000–$1FFF (HD404358, HD40A4358), $0000–$3FFF (HD407A4359)): The entire ROM area can be

used for program coding.

$000F

$0FFF

$1800

$0010

$003F

$0040

Vector address

(16 words)

Zero-page subroutine

(64 words)

Pattern (4,096 words)

Program (4,096 words)

Program

(8,192 words)

$0000

$0001

$0002

$0003

$0004

$0005

$0006

$0007

$0008

$0009

$000A

$000B

$000C

$000D

$000E

$000F

0

1

JMPL instruction

(jump to

RESET, STOPC routine)

JMPL instruction

(jump to

INT routine)

JMPL instruction

(jump to timer A routine)

JMPL instruction

(jump to timer B routine)

JMPL instruction

(jump to timer C routine)

JMPL instruction

(jump to A/D converter routine)

JMPL instruction

(jump to

INT routine)

JMPL instruction

(jump to serial routine)

For HD404358, HD40A4358

Program

(16,384 words)

HD407A4359

$1FFF

$2000

$3FFF

For HD404354, HD40A4354

$1000

Program

(6,144 words)

For HD404356, HD40A4356

$17FF

Note: Since the ROM address areas between $0000–$0FFF overlap, the user can

determine how these areas are to be used.

Figure 1 ROM Memory Map

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