SM5953 Datasheet, PDF (17/43 Pages) SyncMOS Technologies,Inc – Six interrupt sources with two priority levels

3.2 Data Memory
The SM5953 has 256B on-chip SRAM. As shown in Fig. 3-2
FF
FF
Higher 128 Bytes (Accessed by SFR (Accessed by direct addressing
indirect addressing mode only)
mode only)
80
80
7F
Lower 128 Bytes (Accessed by
direct & indirect addressing mode )
00
Fig. 3-2: RAM architecture
3.3 Data memory - lower 128 byte (00h to 7Fh)
Data memory 00h to FFh is the same as 8052.
The address 00h to 7Fh can be accessed by direct and indirect addressing modes.
Address 00h to 1Fh is register area.
Address 20h to 2Fh is memory bit area.
Address 30h to 7Fh is for general memory area.
3.4 Data memory - higher 128 byte (80h to FFh)
The address 80h to FFh can be accessed by indirect addressing mode.
Address 80h to FFh is data area.
SM5953
8-Bit Micro-controller
15KB with ISP Flash
& 256B RAM embedded
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M074
Ver D SM5953 04/16/2015
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