E202075_HD404889 Datasheet, PDF (194/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Note on ROM Ordering
Please note the following when ordering HD404888, HD4048812, HD404898 or HD4048912 ROM.
When ordering ROM, please fill the "Not used" areas below with all-1 data, to give the same amount of
data as for the 16-kwords version (HD404889, HD404899). The program that converts ROM data to mask
drawing data is the same as that used for the 16-kwords version, and therefore the same amount of data is
necessary. This applies both to orders using EPROM and orders using data transmission.
8-kword ROM
version: HD404888, HD404898
Write all-1 data to addresses
$2000 to $3FFF.
$0000
$000F
$0010
$003F
$0040
Vector addresses
Zero page
subroutine area
(64 words)
12-kword ROM version:
HD4048812, HD4048912
Write all-1 data to addresses
$3000 to $3FFF.
$0000
$000F
$0010
$003F
$0040
Vector addresses
Zero page
subroutine area
(64 words)
Program and pattern
area (8,192 words)
$1FFF
$2000
Program and pattern
area (12,288 words)
Not used
$3FFF
Note : Write all-1 data in shaded areas.
$2FFF
$3000
$3FFF
Not used
192