H8SLASH3021 datasheet(523/712 Pages) RENESAS

523 / 712 page

15. ROM

Rev.2.00 Mar. 22, 2007 Page 499 of 684

REJ09B0352-0200

15.13

Notes on Ordering Mask ROM Version Chips

When ordering chips with mask ROM, note the following.

1. When ordering through an EPROM, use a 512-kbyte one.

2. Fill all unused addresses with H'FF as shown in figure 15.21 to make the ROM data size the

same as for the 512-kbyte version. This applies to ordering through an EPROM and through

electrical data transfer.

3. The registers that control the flash memory (FLMCR1, FLMCR2, EBR1, EBR2, and RAMER)

are for use exclusively by the flash memory version, and are not provided in the mask ROM

version. Reads to the corresponding addresses in the mask ROM version will always return 1,

and writes to these addresses are invalid. This point must be noted when switching from the

flash memory version to a mask ROM version.

H'00000

HD6433022

(ROM: 256 kbytes)

H'00000 — H'3FFFF

HD6433021

(ROM: 192 kbytes)

H'00000 — H'2FFFF

HD6433020

(ROM: 128 kbytes)

H'00000 — H'1FFFF

H'7FFFF

H'00000

H'7FFFF

H'00000

H'7FFFF

H'1FFFF

H'20000

H'40000

H'3FFFF

H'30000

H'2FFFF

Not used*

Note: * Write H'FF to all addresses in these areas.

Figure 15.21 Mask ROM Addresses and Data

H8/3021 Datasheet(PDF) 523 Page - Renesas Technology Corp