SM5953 Datasheet, PDF (16/43 Pages) SyncMOS Technologies,Inc – Six interrupt sources with two priority levels

SM5953
8-Bit Micro-controller
15KB with ISP Flash
& 256B RAM embedded
3. Memory Structure
The SM5953 memory structure follows general 8052 structure. It is 15KB program memory.
3.1 Program Memory
The SM5953 has 15KB on-chip flash memory which can be used as general program memory or EEPROM, on
which include up to 3.875K byte specific ISP service program memory space. The address range for the 15K byte
is $0000h to $3BFFh. The address range for the ISP service program is $3000h to $3F7Fh. The ISP service
program size can be partitioned as N blocks (N=0 to 8). When N = 1 means address $3E00h to $3F7Fh reserved
for ISP service program. When N=2 means memory address $3C00h to $3F7Fh reserved for ISP service
program…etc. Value N can be set and programmed into SM5953 configuration by writer. As shown in Fig. 3-1.
ISP service
Program space,
Up to 3.875K
3F7F
3E00
3C00
3A00
3800
3600
3400
3200
3000
N=0
N=1
N=2
N=3
N=4
N=5
N=6
N=7
N=8
15K Program
Memory space
0000
Fig. 3-1: SM5953 programmable Flash
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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