S34ML01G204THB000 Ver la hoja de datos (PDF) - Spansion Inc.

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S34ML01G204THB000

Spansion® SLC NAND Flash Memory for Embedded

Spansion Inc. 

Data Sheet

3.8

Read Status Register

The Status Register is used to retrieve the status value for the last operation issued. After writing 70h

command to the command register, a read cycle outputs the content of the Status Register to the I/O pins on

the falling edge of CE# or RE#, whichever occurs last. This two-line control allows the system to poll the

progress of each device in multiple memory connections even when R/B# pins are common-wired. Refer to

Section 3.2 on page 29 for specific Status Register definition, and to Figure 6.22 on page 56 for timings.

If the Read Status Register command is issued during multiplane operations then Status Register polling will

return the combined status value related to the outcome of the operation in the two planes according to the

following table:

Status Register Bit

Bit 0, Pass/Fail

Bit 1, Cache Pass/Fail

Composite Status Value

OR

OR

In other words, the Status Register is dynamic; the user is not required to toggle RE# / CE# to update it.

The command register remains in Status Read mode until further commands are issued. Therefore, if the

Status Register is read during a random read cycle, the read command (00h) must be issued before starting

read cycles.

Note: The Read Status Register command shall not be used for concurrent operations in multi-die stack

configurations (single CE#). “Read Status Enhanced” shall be used instead.

3.9 Read Status Enhanced — S34ML02G2 and S34ML04G2

Read Status Enhanced is used to retrieve the status value for a previous operation in the specified plane.

Figure 6.23 on page 57 defines the Read Status Enhanced behavior and timings. The plane and die address

must be specified in the command sequence in order to retrieve the status of the die and the plane of interest.

Refer to Table 3.2 for specific Status Register definitions. The command register remains in Status Read

mode until further commands are issued.

The Status Register is dynamic; the user is not required to toggle RE# / CE# to update it.

3.10

Read Status Register Field Definition

Table 3.2 below lists the meaning of each bit of the Read Status Register and Read Status Enhanced

(S34ML02G2 and S34ML04G2).

28

Spansion® SLC NAND Flash Memory for Embedded

S34ML01G2_04G2_10 September 5, 2014

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