SN8A1702AX datasheet(25/112 Pages) SONIX

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Preliminary

SN8P1702A/SN8P1703A

8-bit micro-controller build-in 12-bit ADC

SONiX TECHNOLOGY CO., LTD

Page 25

Revision 0.5

DATA MEMORY (RAM)

OVERVIEW

The SN8P1702A/SN8P1703A has internally built-in the data memory up to 256 bytes for storing the general-purpose

data.

128 * 8-bit general purpose area in bank 0

128 * 8-bit system special register area

The memory is separated into bank 0 and bank 1. The user can program RAM bank selection bits of RBANK register to

access all data in any of the two RAM banks. The bank 0, using the first 128-byte location assigned as

general-purpose area, and the remaining 128-byte in bank 0 as system register.

RAM location

000h

000h~07Fh of Bank 0 = To store general-

“

purpose data (128 bytes).

“

07Fh

General purpose area

080h

080h~0FFh of Bank 0 = To store system

“

registers (128 bytes).

“

System register

BANK 0

0FFh

End of bank 0 area

Figure 3-2. RAM Location

Note: The undefined locations of system register area are logic “high” after executing read instruction

“MOV

A, M”.

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