HD404318 Datasheet, PDF (66/68 Pages) Hitachi Semiconductor – 4-bit HMCS400-series microcomputer

HD404318 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 HD404314 and
HD404316 as an 8-kword version
(HD404318). An 8-kword data size is required to change ROM data to mask manufacturing data since the
program used is for an 8-kword version.
This limitation applies when using an EPROM or a data base.
ROM 4-kword version:
HD404314
Address $1000–$1FFF
ROM 6-kword version:
HD404316
Address $1800–$1FFF
$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
64