HD404326UH View Datasheet(PDF) - Hitachi -> Renesas Electronics

Part Name

Description

Manufacturer

HD404326UH

4-Bit Microcontroller

Hitachi -> Renesas Electronics 

HD404328 Series

Memory Map

ROM Memory Map

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

0

15

16

63

64

4095

4096

6143

6144

8191

8192

Vector address

$0000

$000F

$0010

Zero-page subroutine

(64 words)

$003F

Pattern

$0040

(4,096 words)

HD404324,

HD404324U program

(4,096 words)

$0FFF

$1000

HD404326,

HD404326U program

(6,144 words)

HD404328,

HD404328U program

(8,192 words)

$17FF

$1800

$1FFF

$2000

0

JMPL instruction

1 (jump to reset routine)

2

JMPL instruction

3 (jump to INT0 routine)

4

JMPL instruction

5 (jump to INT1 routine)

6

JMPL instruction

7 (jump to timer A routine)

8

JMPL instruction

9 (jump to timer B routine)

10

JMPL instruction

11 (jump to timer C routine)

12

JMPL instruction

13 (jump to ZCD routine)

14

JMPL instruction

15 (jump to A/D, serial routines)

$0000

$0001

$0002

$0003

$0004

$0005

$0006

$0007

$0008

$0009

$000A

$000B

$000C

$000D

$000E

$000F

HD4074329,

HD4074329U program

(16,384 words)

16383

$3FFF

Figure 1 ROM Memory Map

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 (HD404324, HD404324U: $0000-$0FFF; HD404326, HD404326U: $0000-$17FF;

HD404328, HD404328U: $0000–$1FFF; HD4074329, HD4074329U: $0000–$3FFF): Used for program

coding.

8

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