SyncMOS Technologies International, Inc.
SM89516
8-Bits Micro-controller
With 64KB flash & 1KB RAM embedded
1.2 Data Memory
The SM89516 has 1K bytes on-chip RAM, 256 bytes of it are the same as general 8052 internal memory structure
while the expanded 768 bytes on-chip RAM can be accessed by external memory addressing method (by instruction
MOVX).
Data Memory - Lower 128 byte
Data memory $00 to $FF is the same as 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 for general memory area.
Data memory - Higher 128 byte
The address $80 to $FF can be accessed by indirect addressing mode only.
Addressing $80 to $FF is data area.
Data Memory - Expanded 768 bytes
From external address $0000 to $02FF is the on-chip expanded RAM area, total 768 bytes. This area can be
accessed by external direct addressing mode only (by instruction MOVX).
Specifications subject to change without notice contact your sales representatives for the most recent information.
Ver 2.1 SM89516 08/2006
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SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
