M58WR064HT datasheet(19/111 Pages) NUMONYX

Part #	M58WR064HT

Description	64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V supply Flash memories

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Manufacturer	NUMONYX [Numonyx B.V]

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M58WR064HT, M58WR064HB

Command interface - Standard commands

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5.4

Read CFI Query Command

The Read CFI Query command is used to read data from the Common Flash Interface

(CFI). The Read CFI Query Command consists of one Bus Write cycle, to an address within

one of the banks. Once the command is issued subsequent Bus Read operations in the

same bank read from the Common Flash Interface.

If a Read CFI Query command is issued in a bank that is executing a Program or Erase

operation the bank will go into Read CFI Query mode, subsequent Bus Read cycles will

output the CFI 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.

The status of the other banks is not affected by the command (see Table 12). After issuing a

Read CFI Query command, a Read Array command should be issued to the addressed

bank to return the bank to Read Array mode.

Dual operations between the Parameter Bank and

the CFI memory space are not allowed (see Table 14: Dual Operation Limitations for

details).

See Appendix B: Common Flash Interface, Tables 31, 32, 33, 34, 35, 36, 37, 38, 39 and 40

for details on the information contained in the Common Flash Interface memory area.

5.5

Clear Status Register Command

The Clear Status Register command can be used to reset (set to ‘0’) error bits SR1, SR3,

SR4 and SR5 in the Status Register. One bus write cycle is required to issue the Clear

Status Register command. The Clear Status Register command does not change the Read

mode of the bank.

The error bits in the Status Register do not automatically return to ‘0’ when a new command

is issued. The error bits in the Status Register should be cleared before attempting a new

Program or Erase command.

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