SyncMOS Technologies International, Inc.
SM5964
8-Bits Micro-controller
64KB ISP flash & 1KB RAM embedded
Extension Function Description
1. Memory Structure
The SM5964 is the general 8052 hardware core to integrate the ISP function as a single chip micro controller. It’s
memory structure follows general 8052 structure .
1.1 Program Memory
The SM5964 has 64K byte on-chip flash memory which used as general program memory, on which include up to 4K
byte specific ISP service program memory space. The address range for the 64K byte is $0000 to $FFFF. The address
range for the ISP service program is $F000 to $FFFF. The ISP service program size can be partitioned as N blocks of
512 byte (N=0 to 8). When N=0 means no ISP service program space available, total 64K byte memory used as
program memory. When N=1 means memory address $FE00 to $FFFF reserved for ISP service program. When N=2
means memory address $FC00 to FFFF reserved for ISP service program,...etc. Value N can be set and programmed
into SM5964 by writer.
1.1.1 Program Code Security
MOVC instruction executed from external program memory space will not be able to fetch internal codes from on chip
program memory after the chip is protected on the Writer.
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Specifications subject to change without notice contact your sales representatives for the most recent information.
Ver 2.2 SM5964 08/2006
6
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
