SyncMOS Technologies International, Inc.

SM59264

8-Bits Micro-controller

with 128KB flash & 1KB RAM & TWSI & SPWM embedded

Specifications subject to change without notice contact your sales representatives for the most recent information.

Ver 2.1 SM59264 08/2006

7

Note: The single flash block address structure for doing the ISP function to the on-chip data flash as well as program

ROM flash.

1.2 Data Memory

The SM59264 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), or by ‘Bank mapping direct addressing mode’ as described in page 9. The SM59264 also has 64K bytes data

flash embedded in. The contents of data flash can be erased or programmed by software control and can be read by

MOVX instruction. User can use MOVX instruction to access internal RAM, internal data flash or external memory by

setting OME and DFEN. The different setting of OME and DFEN will map to different memory block.