Datenblatt-Suchmaschine für elektronische Bauteile |
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GD25B16C Datenblatt(PDF) 35 Page - GigaDevice Semiconductor (Beijing) Inc. |
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GD25B16C Datenblatt(HTML) 35 Page - GigaDevice Semiconductor (Beijing) Inc. |
35 / 53 page 3.3V Uniform Sector Dual and Quad Serial Flash GD25B16C 35 Address A23-A16 A15-A10 A9-A0 Security Registers 00000000 000000 Don’t Care Figure 32. Erase Security Registers command Sequence Diagram 7.29. Program Security Registers (42H) The Program Security Registers command is similar to the Page Program command. It allows from 1 to 256 bytes Security Registers data to be programmed. A Write Enable (WREN) command must previously have been executed to set the Write Enable Latch (WEL) bit before sending the Program Security Registers command. The Program Security Registers command is entered by driving CS# Low, followed by the command code (42H), three address bytes and at least one data byte on SI. As soon as CS# is driven high, the self-timed Program Security Registers cycle (whose duration is tPP) is initiated. While the Program Security Registers cycle is in progress, the Status Register may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Program Security Registers cycle, and is 0 when it is completed. At some unspecified time before the cycle is completed, the Write Enable Latch (WEL) bit is reset. If the Security Registers Lock Bit (LB) is set to 1, the Security Registers will be permanently locked. Program Security Registers command will be ignored. Address A23-A16 A15-A8 A7-A0 Security Registers 0 00H 00H Byte Address Security Registers 1 00H 01H Byte Address Security Registers 2 00H 02H Byte Address Security Registers 3 00H 03H Byte Address Figure 33. Program Security Registers command Sequence Diagram Command 0 1 2 3 4 5 6 7 44H CS# SCLK SI 8 9 29 30 31 MSB 2 1 0 24 Bits Address 23 22 Command 0 1 2 3 4 5 6 7 42H 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 |
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Ähnliche Beschreibung - GD25B16C |
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