M58LT128GST datasheet(20/98 Pages) STMICROELECTRONICS

20 / 98 page

4 Command Interface

M58LT128GST, M58LT128GSB

20/98

cycles will output the Electronic Signature data and the Program/Erase controller will continue

to program or erase in the background.

The Read Electronic Signature command will only change the read mode of the addressed

bank. The read modes of other banks are not affected. Only Asynchronous Read and Single

Synchronous Read operations should be used to read the Electronic Signature. A Read Array

command is required to return the bank to Read Array mode.

4.4

Read CFI Query command

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

One Bus Write cycle is required to issue the Read CFI Query command. Once a bank is in

Read CFI Query mode, subsequent Bus Read operations in the same bank read from the

Common Flash Interface.

The Read CFI Query command can be issued at any time, even during program or erase

operations.

If a Read CFI Query command is issued to 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.

The Read CFI Query command will only change the read mode of the addressed bank. The

read modes of other banks are not affected. Only Asynchronous Read and Single Synchronous

Read operations should be used to read from the CFI. A Read Array command is required to

return the bank to Read Array mode. Dual operations between the Parameter Bank and the CFI

memory space are not allowed (see Table 15: Dual Operation Limitations for details).

See Appendix B: Common Flash Interface, Table 36, Table 37, Table 38, Table 39, Table 40,

Table 42, Table 43, Table 44 and Table 45 for details on the information contained in the

Common Flash Interface memory area.

4.5

Clear Status Register command

The Clear Status Register command can be used to reset (set to ‘0’) all error bits (SR1, 3, 4

and 5) in the Status Register.

One Bus Write cycle is required to issue the Clear Status Register command. The Clear Status

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.

M58LT128GST Datasheet(PDF) 20 Page - STMicroelectronics