4553 datasheet(19/145 Pages) RENESAS

19 / 145 page

Rev.3.02

Dec 22, 2006

page 19 of 142

REJ03B0024-0302

4553 Group

PROGRAM MEMORY (ROM)

The program memory is a mask ROM. 1 word of ROM is composed

of 10 bits. ROM is separated every 128 words by the unit of page

(addresses 0 to 127). Table 1 shows the ROM size and pages. Fig-

ure 10 shows the ROM map of M34553ED.

Table 1 ROM size and pages

Part number

M34553M4

M34553M4H

M34553M8

M34553M8H

M34553G8

M34553G8H

ROM (PROM) size

(✕ 10 bits)

4096 words

8192 words

Pages

32 (0 to 31)

64 (0 to 63)

A part of page 1 (addresses 008016 to 00FF16) is reserved for in-

terrupt addresses (Figure 11). When an interrupt occurs, the

address (interrupt address) corresponding to each interrupt is set

in the program counter, and the instruction at the interrupt address

is executed. When using an interrupt service routine, write the in-

struction generating the branch to that routine at an interrupt

address.

Page 2 (addresses 010016 to 017F16) is the special page for sub-

routine calls. Subroutines written in this page can be called from

any page with the 1-word instruction (BM). Subroutines extending

from page 2 to another page can also be called with the BM in-

struction when it starts on page 2.

ROM pattern (bits 7 to 0) of all addresses can be used as data ar-

eas with the TABP p instruction.

Fig. 10 ROM map of M34553M8/M8H/G8/G8H

Fig. 11 Page 1 (addresses 008016 to 00FF16) structure

9876543210

Interrupt address page

0000

008016

017F16

Subroutine special page

007F

00FF16

010016

1FFF16

018016

Page 1

Page 2

Page 0

Page 3

Page 63

8765

432

External 0 interrupt address

008016

008216

008416

Timer 1 interrupt address

Timer 2 interrupt address

008616

008816

008A16

008C16

008E16

00FF16

Timer 3 interrupt address

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