SM59128 参数 Datasheet PDF下载

SyncMOS Technologies International, Inc.

SM59128

8-Bits Micro-controller

Embedded 128KB flash & 1KB RAM & IIC & SPWM

1.2 Data Memory

The SM59128 has 1024 bytes on-chip RAM consists of 256 bytes as same as 8052 internal memory structure and

expanded 768 bytes on-chip RAM that can be accessed by external memory addressing method (by instruction

MOVX), or by ‘Bank mapping direct addressing mode’. User can use MOVX instruction to access internal RAM or

external memory by setting OME. The different setting of OME will map to different memory block.

OME

0

1

address of MOVX below 768

external memory

internal RAM

address of MOVX over 768

external memory

external memory

1.2.1 Data Memory - Lower 128 byte ($00 to $7F)

Data Memory $00 to $FF follow 8052.

The address $00 to $7F can be accessed by direct and indirect addressing modes.

Address $00 to $1F is register area.

Address $20 to $2F is memory bit area.

Address $30 to $7F is general memory area.

1.2.2 Data Memory - Higher 128 byte ($80 to $FF)

The address $80 to $FF can be accessed by indirect addressing mode or by bank mapping direct addressing

mode.

Address $80 to $FF is data area.

Specifications subject to change without notice contact your sales representatives for the most recent information.

ISSFD-M027Ver: B SM59128

10

06/2009