전자부품 데이터시트 검색엔진 |
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GD25D20CSEG 데이터시트(PDF) 18 Page - GigaDevice Semiconductor (Beijing) Inc. |
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GD25D20CSEG 데이터시트(HTML) 18 Page - GigaDevice Semiconductor (Beijing) Inc. |
18 / 43 page 3.3V Uniform Sector Standard and Dual Serial Flash GD25D40C/20C 18 Figure8. Page Program Sequence Diagram 7.9. Sector Erase (SE) (20H) The Sector Erase (SE) command is for erasing the all data of the specific sector. A Write Enable (WREN) command must previously have been executed to set the Write Enable Latch (WEL) bit. The Sector Erase (SE) command is entered by driving CS# low, followed by the command code, and 3-address byte on SI. Any address inside the sector is a valid address for the Sector Erase (SE) command. CS# must be driven low for the entire duration of the sequence. The Sector Erase command sequence: CS# goes low sending Sector Erase command 3-byte address on SI CS# goes high. The command sequence is shown in Figure9. CS# must be driven high after the eighth bit of the last address byte has been latched in; otherwise the Sector Erase (SE) command is not executed. As soon as CS# is driven high, the self-timed Sector Erase cycle (whose duration is tSE) is initiated. While the Sector Erase cycle is in progress, the Status Register is accessed to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Sector Erase cycle, and becomes 0 when it is completed. At some unspecified time before the cycle is completed, the Write Enable Latch (WEL) bit is reset. A Sector Erase (SE) command applied to a sector which is protected by the Block Protect (BP2, BP1, BP0) bit (see Table1) is not executed. Figure9. Sector Erase Sequence Diagram Command 0 1 2 3 4 5 6 7 02H CS# SCLK SI 8 9 10 28 29 30 31 3 2 1 0 23 22 21 24-bit address 42 43 44 45 41 46 47 40 50 51 52 53 49 54 55 48 6 5 4 3 2 1 0 7 CS# SCLK SI MSB Data Byte 2 32 33 34 35 7 6 5 4 3 2 1 0 MSB 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 Data Byte 1 Data Byte 3 Data Byte 256 MSB MSB MSB 36 37 38 39 Command 0 1 2 3 4 5 6 7 20H CS# SCLK SI 8 9 29 30 31 MSB 2 1 0 24 Bits Address 23 22 |
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