HD404818 Datasheet, PDF (98/100 Pages) Hitachi Semiconductor – 16-digit LCD driver

HD404818 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 an 8-kword version
(HD404818 and HD40L4818). 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 2-kword version:
HD404812, HD40L4812
Address $0800–$1FFF
ROM 4-kword version:
HD404814, HD40L4814
Address $1000–$1FFF
ROM 6-kword version:
HD404816, HD40L4816
Address $1800–$1FFF
$0000
$0000
$0000
Vector address
Vector address
Vector address
$000F
$0010
$003F
$0040
$07FF
$0800
Zero-page
subroutine
(64 words)
Pattern & program
(2,048 words)
$000F
$0010
$003F
$0040
$0FFF
$1000
Zero-page
subroutine
(64 words)
Pattern & program
(4,096 words)
$000F
$0010
$003F
$0040
$0FFF
$1000
$17FF
$1800
Zero-page
subroutine
(64 words)
Pattern
(4,096 words)
Program
(6,144 words)
Not used
$1FFF
Not used
$1FFF
Not used
Fill this area with 1s
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