HD404848 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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производитель

HD404848

4-Bit Single-Chip Microcomputer

Hitachi -> Renesas Electronics 

HD404849 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 16-kword version

(HD404849). A 16-kword data size is required to change ROM data to mask manufacturing data since the

program used is for a 16-kword version.

This limitation applies when using an EPROM or a data base.

8-kword ROM version:

HD404848

Write all-1 data to addresses

$2000 to $3FFF

$0000

Vector address

$000F

$0010

$003F

$0040

$1FFF

$2000

Zero-page subroutine

(64 words)

Pattern & program

(8,192 words)

$3FFF

Not used

$0000

12-kword ROM version:

HD4048412

Write all-1 data to addresses

$3000 to $3FFF

Vector address

$000F

$0010

$003F

$0040

$2FFF

$3000

Zero-page subroutine

(64 words)

Pattern & program

(12,288 words)

$3FFF

Not used

Write all-1 data in shaded areas

123

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