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SM89516Q датащи(PDF) 6 Page - SyncMOS Technologies,Inc |
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SM89516Q датащи(HTML) 6 Page - SyncMOS Technologies,Inc |
6 / 19 page May 2001 Specifications subject to change without notice,contact your sales representatives for the most recent information. 6/19 Ver 1.3 PID 89516 05/01 SyncMOS Technologies Inc. SM89516 Data Memory The SM89516 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) FF 80 7F 00 FF 80 Expanded 768 bytes (Accessed direct external addressing by instruction MOVX) 02FF 0000 Data Memory - Lower 128 byte 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. Data memory - Higher 128 byte The address $80 to $FF can be accessed by indirect addressing mode only. Addressing $80 to $FF is data area. Data Memory - Expanded 768 bytes 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 only (by instruction MOVX). Higher 128 bytes (Access by indirect addressing mode only) SFR (Accessed by direct addressing mode only) Lower 128 bytes (Accessed by direct & indirect by mode, addressing mode) (OME = 1) Internal RAM Control Register (RCON, $85) bit-7 bit-0 Read : Unused Unused Unused Unused Unused Unused RAMS1 RAMS0 Write : Reset value : ****** 0 0 |
Аналогичный номер детали - SM89516Q |
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Аналогичное описание - SM89516Q |
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