SM59R02G1 Datasheet, PDF (24/57 Pages) SyncMOS Technologies,Inc – Instruction-set compatible with MCS-51

SM59R02G1
8-Bit Micro-controller
8KB with ISP Flash
& 256B RAM embedded
3.2. Data Memory
The SM59R02G1 has 256Bytes on-chip SRAM, 256 Bytes are the same as general 8052 internal memory structure.
Fig 3-2 (a)：External memory access as read
Fig 3-2 (b)：External memory access as write
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. 3-3: RAM architecture
3.2.1. 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.
3.2.2. 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.
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M061
24
Ver.G SM59R02G1 09/2015