전자부품 데이터시트 검색엔진 |
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SST89C54-33-AC-NI 데이터시트(PDF) 8 Page - Silicon Storage Technology, Inc |
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SST89C54-33-AC-NI 데이터시트(HTML) 8 Page - Silicon Storage Technology, Inc |
8 / 50 page 8 © 2000 Silicon Storage Technology, Inc. 344-2 8/00 FlashFlex51 MCU SST89C54 / SST89C58 Preliminary Specifications MEMORY ORGANIZATION The SST89C54/58 have separate address spaces for program and data memory. Program Memory There are two internal flash memory blocks in the SST89C54/58. The primary flash memory Block 0 has 16/32 KByte and occupies the address space 0000h to 3FFFh/7FFFh. The secondary flash memory Block 1 has 4 KByte and occupies the address space F000h to FFFFh. The 16/32K x8 primary SuperFlash block is organized as 128/256 uniform sectors with sector address from A15 to A7. Each sector contains 2 rows with row address from A15 to A6. Each row has 64 Bytes with byte address from A5 to A0. FIGURE 4: SECTOR ORGANIZATION The 4K x8 secondary SuperFlash block is organized as 64 uniform sectors with sector address from A15 to A6. Each sector contains 2 rows with row address from A15 to A5. Each row contains 32 Bytes with byte address from A4 to A0. Figure 4 shows the sector organization for SST89C54/58. When internal code operation is enabled (EA# = 1), the primary 16/32 KByte flash memory block is always visible to the program counter for code fetching. Figures 5 and 6 show the program memory organizations for the SST89C54/58. When internal code operation is enabled (EA# = 1), the secondary 4 KByte flash memory block is selectively visible for code fetching. The secondary block is always accessible through the SuperFlash mailbox registers: SFCM, SFCF, SFAL, SFAH, SFDT and SFST. When bit 7 of the SuperFlash Configuration mailbox register (SFCF[7]), SFR address location B1h, is set, the second- ary 4 KByte block will be visible by program counter. 7FFFh 7F80h 4000h 3FFFh 0000h Block 0 (16/32 KByte) 344 ILL F47.6 Sector 255 Sector 127 Sector 0 3F80h 007Fh FFFFh FFC0h F03Fh Block 1 (4 KByte) Primary Secondary Sector 63 Sector 0 F000h 89C58 89C54 |
유사한 부품 번호 - SST89C54-33-AC-NI |
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유사한 설명 - SST89C54-33-AC-NI |
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