HD404339 Datasheet, PDF (78/80 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer with large-capacity memory

HD404339 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 for the HD404334 and
HD404336 as an 8-kword version (HD404338), and to create the same data size for the HD4043312 as a
16-kword version (HD404339).
The 8-kword and 16-kword data sizes are required to change ROM data to mask manufacturing data since
the program used is for an 8-k or 16-kword version.
This limitation applies when using an EPROM or a data base.
ROM 4-kword version:
HD404334
Address $1000–$1FFF
$0000
$000F
$0010
$003F
$0040
$0FFF
$1000
$1FFF
Vector address
Zero-page subroutine
(64 words)
Pattern & program
(4,096 words)
Not used
ROM 6-kword version:
HD404336
Address $1800–$1FFF
$0000
$000F
$0010
$003F
$0040
$17FF
$1800
$1FFF
Vector address
Zero-page subroutine
(64 words)
Pattern & program
(6,144 words)
Not used
ROM 12-kword version:
HD4043312
Address $3000–$3FFF
$0000
$000F
$0010
$003F
$0040
$2FFF
$3000
$3FFF
Vector address
Zero-page subroutine
(64 words)
Pattern & program
(12,288 words)
Not used
Fill this area with 1s
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