Preliminary
SN8P1702A/SN8P1703A
8-bit micro-controller build-in 12-bit ADC
3ADDRESS SPACES
PROGRAM MEMORY (ROM)
OVERVIEW
ROM Maps for SN8P1702A/SN8P1703A devices provide 1K x 16-bit program memory. The SN8P1702A/SN8P1703A
program memory is able to fetch instructions through 12-bit wide PC (Program Counter) and can look up ROM data by
using ROM code registers (R, X, Y, Z). In standard configuration, the device’s 1,024 x 16-bit program memory has four
areas:
ꢀ
ꢀ
ꢀ
ꢀ
1-word reset vector addresses
1-word Interrupt vector addresses
5-words reserved area
1K words (SN8P1702)
All of the program memory is partitioned into three coding areas. The first area is located from 00H to 03H(The Reset
vector area), the second area is a reserved area 04H ~07H, the third area is for the interrupt vector and the user code
area from 0008H to 03FEH. The address 08H is the interrupt enter address point.
ROM
0000H
0001H
0002H
0003H
0004H
0005H
0006H
0007H
0008H
0009H
.
Reset vector
User reset vector
Jump to user start address
Jump to user start address
Jump to user start address
General purpose area
Reserved
Interrupt vector
User interrupt vector
User program
.
000FH
0010H
0011H
.
General purpose area
.
03FEH
End of user program
03FFH
Reserved
Figure 3-1. ROM Address Structure
SONiX TECHNOLOGY CO., LTD
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Revision 0.5
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