Notes On Ordering Mask Rom Version Chips; Figure 18.20 Mask Rom Addresses And Data - Hitachi H8/3062 Hardware Manual

18.13

Notes on Ordering Mask ROM Version Chips

When ordering H8/3064 with mask ROM, note the following.
1. When ordering by means of an EPROM, use a 512-kbyte one.
2. Fill all unused addresses with H'FF as shown in figure 18.20 to make the ROM data size 512-
kbytes for the H8/3064 mask ROM version. This applies to ordering by means of an EPROM
and by means of data transmission.
Note: * Write H'FF in all addresses in this.
3. The flash memory control registers (FLMCR, EBR, RAMCR, FLMSR, FLMCR1, FLMCR2,
EBR1, and EBR2) used by the versions with on-chip flash memory are not provided in the
mask ROM version. Reading the corresponding addresses in a mask ROM version will always
return 1s, and writes to these addresses are disabled. This must be borne in mind when
switching from a flash memory version to a mask ROM version.
HD6433064B
(ROM: 256 kbytes)
Addresses:
H'00000–7FFFF
Not used *

Figure 18.20 Mask ROM Addresses and Data

H'00000
H'3FFFF
H'40000
H'7FFFF
573