HD404019RH datasheet(9/65 Pages) RENESAS

9 / 65 page

HD404019R Series

Memory Map

ROM Memory Map

The MCU contains a 16,384-word

× 10-bit ROM (mask ROM or PROM). It is described in the following

paragraphs and by the ROM memory map in figure 1.

Vector Address Area ($0000 to $000F): Locations $0000 through $000F are reserved for JMPL

instructions to branch to the starting address of the initialization program and of the interrupt programs.

After reset or an interrupt routine is processed, the program is executed from the vector address.

Zero-Page Subroutine Area ($0000 to $003F): Locations $0000 through $003F are reserved for

subroutines. The CAL instruction branches to subroutines.

Pattern Area ($0000 to $0FFF): Locations $0000 through $0FFF are reserved for ROM data. The P

instruction can refer to the ROM data as a pattern.

Program Area ($0000 to $3FFF): Locations from $0000 to $3FFF can be used for program code.

4095

4096

16383

$0000

$0FFF

$1000

$3FFF

$0000

$0001

$0002

$0003

$0004

$0005

$0006

$0007

$0008

$0009

$000A

$000B

$000C

$000D

$000E

$000F

JMPL instruction

(jump to reset routine)

JMPL instruction

(jump to

INT0 routine)

JMPL instruction

(jump to

INT1 routine)

JMPL instruction

(jump to timer A routine)

JMPL instruction

(jump to timer B routine)

JMPL instruction

(jump to serial routine)

Vector address

Zero-page subroutine

(64 words)

Pattern

(4096 words)

Program

(16,384 words)

$000F

$0010

$003F

$0040

Figure 1 ROM Memory Map

HD404019RH Datasheet(PDF) 9 Page - Renesas Technology Corp

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