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AT25FS010N-SH27-B Datasheet(PDF) 8 Page - ATMEL Corporation |
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AT25FS010N-SH27-B Datasheet(HTML) 8 Page - ATMEL Corporation |
8 / 24 page 8 5167E–SFLSH–5/09 AT25FS010 4. Functional Description The AT25FS010 is designed to interface directly with the synchronous serial peripheral interface (SPI) of the 6800 type series of microcontrollers. The AT25FS010 utilizes an 8-bit instruction register. The list of instructions and their operation codes are contained in Table 4-1. All instructions, addresses, and data are transferred with the MSB first and start with a high-to-low transition. Write is defined as program and/or erase in this specification. The following commands, PRO- GRAM, SECTOR ERASE, BLOCK ERASE, CHIP ERASE, and WRSR are write instructions for AT25FS010. Note: 1. Either one of the OP CODES will execute the instruction. WRITE ENABLE (WREN): The device will power up in the write disable state when VCC is applied. All write instructions must therefore be preceded by the WREN instruction. WRITE DISABLE (WRDI): To protect the device against inadvertent writes, the WRDI instruc- tion disables all write commands. The WRDI instruction is independent of the status of the WP pin. READ STATUS REGISTER (RDSR): The RDSR instruction provides access to the status regis- ter. The READY/BUSY and write enable status of the device can be determined by the RDSR instruction. Similarly, the Block Write Protection bits indicate the extent of protection employed. Table 4-1. Instruction Set for the AT25FS010 Instruction Name One Byte OpCode Operation Binary Hex WREN 0000 X110 06 Set Write Enable Latch WRDI 0000 X100 04 Reset Write Enable Latch RDSR 0000 X101 05 Read Status Register WRSR 0000 X001 01 Write Status Register READ 0000 0011 03 Read Data from Memory Array FAST READ 0000 1011 0B Read Data from Memory Array (with dummy cycles) PROGRAM 0000 X010 02 Program Data Into Memory Array SECTOR ERASE (1) 0010 0000 20 Erase One 4kbyte Sector in Memory Array 1101 0111 D7 BLOCK ERASE(1) 0101 0010 52 Erase One 32kbyte Block in Memory Array 1101 1000 D8 CHIP ERASE(1) 0110 0000 60 Erase All Memory Array 1100 0111 C7 RDID(1) 1001 1111 9F Read Manufacturer and Product ID 1010 1011 AB |
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