S29GL01GS10DFIV13 datasheet(35/108 Pages) CYPRESS

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Document Number: 001-98285 Rev. *R

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S29GL01GS/S29GL512S

S29GL256S/S29GL128S

5. Bits 5, 4, 3, and 1 are cleared to 0 by the Clear Status Register command or Reset command.

6. Upon issuing the Erase Suspend Command, the user must continue to read status until DRB becomes 1.

7. ESSB is cleared to 0 by the Erase Resume Command.

8. ESB reflects success or failure of the most recent erase operation.

9. PSB reflects success or failure of the most recent program operation.

10. During erase suspend, programming to the suspended sector, will cause program failure and set the Program status bit to 1.

11. Upon issuing the Program Suspend Command, the user must continue to read status until DRB becomes 1.

12. PSSB is cleared to 0 by the Program Resume Command.

13. SLSB indicates that a program or erase operation failed because the sector was locked.

14. SLSB reflects the status of the most recent program or erase operation.

5.5.2

Data Polling Status

During an active Embedded Algorithm the EAC switches to the Data Polling ASO to display EA status to any read access. A single

word of status information is aliased in all locations of the device address space. In the status word there are several bits to

determine the status of an EA. These are referred to as DQ bits as they appear on the data bus during a read access while an EA is

in progress. DQ bits 15 to 8, DQ4, and DQ0 are reserved and provide undefined data. Status monitoring software must mask the

reserved bits and treat them as don't care. Table 5.3 on page 39 and the following subsections describe the functions of the

remaining bits.

5.5.2.1

DQ7: Data# Polling

The Data# Polling bit, DQ7, indicates to the host system whether an Embedded Algorithm is in progress or has completed. Data#

Polling is valid after the rising edge of the final WE# pulse in the program or erase command sequence. Note that the Data# Polling

is valid only for the last word being programmed in the write-buffer-page during Write Buffer Programming. Reading Data# Polling

status on any word other than the last word to be programmed in the write-buffer-page will return false status information.

During the Embedded Program algorithm, the device outputs on DQ7 the complement of the data bit programmed to DQ7. This DQ7

status also applies to programming during Erase Suspend. When the Embedded Program algorithm is complete, the device outputs

the data bit programmed to bit 7 of the last word programmed. In case of a Program Suspend, the device allows only reading array

data. If a program address falls within a protected sector, Data# Polling on DQ7 is active for approximately 20 µs, then the device

returns to reading array data.

During the Embedded Erase or Blank Check algorithms, Data# Polling produces a 0 on DQ7. When the algorithm is complete, or if

the device enters the Erase Suspend mode, Data# Polling produces a 1 on DQ7. This is analogous to the complement / true datum

output described for the Embedded Program algorithm: the erase function changes all the bits in a sector to 1; prior to this, the

device outputs the complement or '0'. The system must provide an address within the sector selected for erasure to read valid status

information on DQ7.

After an erase command sequence is written, if the sector selected for erasing is protected, Data# Polling on DQ7 is active for

approximately 100 µs, then the device returns to reading array data.

When the system detects DQ7 has changed from the complement to true data, it can read valid data at DQ15-DQ0 on the following

read cycles. This is because DQ7 may change asynchronously with DQ6-DQ0 while Output Enable (OE#) is asserted Low. This is

illustrated in Figure 11.17 on page 87. Table5.3 onpage39 shows the outputs for Data# polling on DQ7. Figure5.2 onpage25

shows the Data# polling algorithm use in Write Buffer Programming.

Valid DQ7 data polling status may only be read from:



the address of the last word loaded into the Write Buffer for a Write Buffer programming operation;



the location of a single word programming operation;



or a location in a sector being erased or blank checked;



or a location in any sector during chip erase.

S29GL01GS10DFIV13 Datasheet(PDF) 35 Page - Cypress Semiconductor

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