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參數(shù)資料
| 型號(hào)： | SM5964C40 |
| 廠商： | 新茂國際科技股份有限公司 |
| 英文描述： | 8-Bits Micro-controller 64KB ISP flash & 1KB RAM embedded |
| 中文描述： | 8位微控制器，64KB的閃存供應(yīng)商 |
| 文件頁數(shù)： | 7/26頁 |
| 文件大?。?/td> | 899K |
| 代理商： | SM5964C40 |
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SyncMOS Technologies International, Inc. SM5964
8-Bits Micro-controller
64KB ISP flash & 1KB RAM embedded
1.2 Data Memory
The SM5964 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.).
Specifications subject to change without notice contact your sales representatives for the most recent information.
Ver 2.2 SM5964 08/2006
7
1.2.1 Data Memory - Lower 128 byte ($00 to $7F)
Data Memory $00 to $FF is the same as 8052.
The address $00 to $7F can be accessed by direct and indirect addressing modes.
Address $00 to $1F is register area.
Address $20 to $2F is memory bit area.
Address $30 to $7F is for general memory area.
1.2.2 Data Memory - Higher 128 byte ($80 to $FF)
The address $80 to $FF can be accessed by indirect addressing mode .
Address $80 to $FF is data area.
1.2.3 Data Memory - Expanded 768 bytes ($0000 to $02FF)
From external address $0000 to $02FF is the on-chip expanded RAM area, total 768 bytes. This area can be accessed
by external direct addressing mode (by instruction MOVX).
If the address of instruction MOVX @DPTR is larger than $02FF then SM5964 will generate the external memory
control signal automatically. The bit 1 (OME) of special function register $BF (SCONF) can enable or disable this
expanded 768 byte RAM. The default setting of OME bit is 1 (enable).
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