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M58WR064HT Datasheet(PDF) 18 Page - Numonyx B.V |
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M58WR064HT Datasheet(HTML) 18 Page - Numonyx B.V |
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18 / 111 page  Command interface - Standard commands M58WR064HT, M58WR064HB 18/111 5 Command interface - Standard commands The following commands are the basic commands used to read, write to and configure the device. Refer to Table 5: Standard commands, in conjunction with the following text descriptions. 5.1 Read Array Command The Read Array command returns the addressed bank to Read Array mode. One Bus Write cycle is required to issue the Read Array command and return the addressed bank to Read Array mode. Subsequent read operations will read the addressed location and output the data. A Read Array command can be issued in one bank while programming or erasing in another bank. However if a Read Array command is issued to a bank currently executing a Program or Erase operation the command will be executed but the output data is not guaranteed. 5.2 Read Status Register Command The Status Register indicates when a Program or Erase operation is complete and the success or failure of operation itself. Issue a Read Status Register command to read the Status Register content. The Read Status Register command can be issued at any time, even during Program or Erase operations. The following read operations output the content of the Status Register of the addressed bank. The Status Register is latched on the falling edge of E or G signals, and can be read until E or G returns to VIH. Either E or G must be toggled to update the latched data. See Table 8 for the description of the Status Register Bits. This mode supports asynchronous or single synchronous reads only. 5.3 Read Electronic Signature Command The Read Electronic Signature command reads the Manufacturer and Device Codes, the Block Locking Status, the Protection Register, and the Configuration Register. The Read Electronic Signature command consists of one write cycle to an address within one of the banks. A subsequent Read operation in the same bank will output the Manufacturer Code, the Device Code, the protection Status of the blocks in the targeted bank, the Protection Register, or the Configuration Register (see Table 6). Dual operations between the Parameter bank and the Electronic Signature locations are not allowed (see Table 14: Dual Operation Limitations). If a Read Electronic Signature command is issued in a bank that is executing a Program or Erase operation the bank will go into Read Electronic Signature mode, subsequent Bus Read cycles will output the Electronic Signature data and the Program/Erase controller will continue to program or erase in the background. This mode supports asynchronous or single synchronous reads only, it does not support page mode or synchronous burst reads. |
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