SN8P1602AS datasheet(16/94 Pages) SONIX

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SN8P1600

8-bit micro-controller

SONiX TECHNOLOGY CO., LTD

Page 16

Revision 1.94

3 ADDRESS SPACES

PROGRAM MEMORY (ROM)

OVERVIEW

The SN8P1600 provides the program memory up to 1024 * 16-bit (4096 *16-bit for SN8P1604) to be addressed and is

able to fetch instructions through 10-bit wide PC (Program Counter). It can look up ROM data by using ROM code

registers (R, Y, Z).

1-word reset vector addresses

1-word interrupt vector addresses

1K words general purpose area (SN8P1602/1603)

4K words general purpose area (SN8P1604)

5-words reserved area

All of the program memory is partitioned into three coding areas. The 1

st area is located from 00H to 03H(The Reset

vector area), the 2

nd area is a reserved area 04H ~07H, the 3rd area is for the interrupt vector and the user code area

from 0008H to 0FFEH. The address 08H is the interrupt enter address point.

SN8P160

SN8P1602/SN8P160

ROM

0000H

Reset vector

User reset vector

0001H

Jump to user start address

0002H

Jump to user start address

0003H

General purpose area

Jump to user start address

0004H

0005H

0006H

0007H

Reserved

0008H

Interrupt vector

User interrupt vector

0009H

User program

000FH

0010H

0011H

0FFEH

03FEH

General purpose area

End of user program

0FFFH

03FFH

Reserved

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