sm59128 SyncMOS Technologies,Inc, sm59128 Datasheet - Page 10

• Manufacturer Part Number: sm59128
• Description: 8-bits Micro-controller Embedded 128kb Flash & 1kb Ram & Iic & Spwm
• Manufacturer: SyncMOS Technologies,Inc

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.
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
SyncMOS Technologies International, Inc.
OME
0
1
address of MOVX below 768
external memory
internal RAM
10
Embedded 128KB flash & 1KB RAM & IIC & SPWM
address of MOVX over 768
external memory
external memory
8-Bits Micro-controller
SM59128
06/2009