HD404618 Datasheet, PDF (87/89 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404618 Series
Notes on ROM Out
Please pay attention to the following items regarding ROM out.
On ROM out, fill the ROM area indicated below with 1s to create the same data size as a 8-kword version
(HD404618). An 8-kword data size is required to change ROM data to mask manufac turing data since the
program used is for a 8-kword version.
This limitation applies when using an EPROM or a data base.
ROM 2-kword version:
HD404612
Address $0800–$1FFF
ROM 4-kword version:
HD404614
Address $1000–$1FFF
ROM 6-kword version:
HD404616
Address $1800–$1FFF
$0000
$000F
$0010
$003F
$0040
$07FF
$0800
$1FFF
Vector
address
Zero-page
subroutine
(64 words)
Pattern &
program
(2,048 words)
Not used
$0000
$000F
$0010
$003F
$0040
$0FFF
$1000
$1FFF
Vector
address
Zero-page
subroutine
(64 words)
Pattern &
program
(4,096 words)
Not used
$0000
$000F
$0010
$003F
$0040
$17FF
$1800
$1FFF
Vector
address
Zero-page
subroutine
(64 words)
Pattern &
program
(6,144 words)
Not used
Fill this area with 1s
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