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PSD813F2 数据表(PDF) 31 Page - STMicroelectronics |
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PSD813F2 数据表(HTML) 31 Page - STMicroelectronics |
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31 / 110 page  31/110 PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2 Figure 10. 8031 Memory Modules – Separate Space Figure 11. 8031 Memory Modules – Combined Space Table 13. VM Register Bit 7 PIO_EN Bit 6 Bit 5 Bit 4 Primary FL_Data Bit 3 Secondary EE_Data Bit 2 Primary FL_Code Bit 1 Secondary EE_Code Bit 0 SRAM_Code 0 = disable PIO mode not used not used 0 = RD can’t access Flash memory 0 = RD can’t access Secondary Flash memory 0 = PSEN can’t access Flash memory 0 = PSEN can’t access Secondary Flash memory 0 = PSEN can’t access SRAM 1= enable PIO mode not used not used 1 = RD access Flash memory 1 = RD access Secondary Flash memory 1 = PSEN access Flash memory 1 = PSEN access Secondary Flash memory 1 = PSEN access SRAM Primary Flash Memory DPLD Secondary Flash Memory SRAM RS0 CSBOOT0-3 FS0-FS7 CS CS CS OE OE RD PSEN OE AI02869C Primary Flash Memory DPLD Secondary Flash Memory SRAM RS0 CSBOOT0-3 FS0-FS7 RD CS CS CS RD OE OE VM REG BIT 2 PSEN VM REG BIT 0 VM REG BIT 1 VM REG BIT 3 VM REG BIT 4 OE AI02870C |
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