S29GL01GP datasheet(36/81 Pages) SPANSION

36 / 81 page

S29GL-P MirrorBit® Flash Family

S29GL-P_00_A14 October 22, 2012

Da ta

Sh e e t

/* Example: Unlock Bypass Program Command

/* Do while in Unlock Bypass Entry Mode!

*( (UINT16 *)base_addr ) = 0x00A0;

/* write program setup command

*( (UINT16 *)pa )

= data;

/* write data to be programmed

/* Poll until done or error.

/* If done and more to program, */

/* do above two cycles again.

/* Example: Unlock Bypass Exit Command */

*( (UINT16 *)base_addr ) = 0x0090;

*( (UINT16 *)base_addr ) = 0x0000;

7.8

Write Operation Status

The device provides several bits to determine the status of a program or erase operation. The following

subsections describe the function of DQ1, DQ2, DQ3, DQ5, DQ6, and DQ7.

7.8.1

DQ7: Data# Polling

The Data# Polling bit, DQ7, indicates to the host system whether an Embedded Program or Erase algorithm

is in progress or completed, or whether the device is in Erase Suspend. Data# Polling is valid after the rising

edge of the final WE# pulse in the 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 returns false status

information.

During the Embedded Program algorithm, the device outputs on DQ7 the complement of the datum

programmed to DQ7. This DQ7 status also applies to programming during Erase Suspend. When the

Embedded Program algorithm is complete, the device outputs the datum programmed to DQ7. The system

must provide the program address to read valid status information on DQ7. If a program address falls within a

protected sector, Data# polling on DQ7 is active, then that sector returns to the read mode.

During the Embedded Erase Algorithm, Data# polling produces a “0” on DQ7. When the Embedded Erase

algorithm is complete, or if the device enters the Erase Suspend mode, Data# Polling produces a “1” on DQ7.

The system must provide an address within any of the sectors selected for erasure to read valid status

information on DQ7.

After an erase command sequence is written, if all sectors selected for erasing are protected, Data# Polling

on DQ7 is active for approximately 100 µs, then the device returns to the read mode. If not all selected

sectors are protected, the Embedded Erase algorithm erases the unprotected sectors, and ignores the

selected sectors that are protected. However, if the system reads DQ7 at an address within a protected

sector, the status may not be valid.

Just prior to the completion of an Embedded Program or Erase operation, DQ7 may change asynchronously

with DQ6-DQ0 while Output Enable (OE#) is asserted low. That is, the device may change from providing

status information to valid data on DQ7. Depending on when the system samples the DQ7 output, it may read

Table 7.15 Unlock Bypass Program

(LLD Function = lld_UnlockBypassProgramCmd)

Cycle

Description

Operation

Byte Address

Word Address

Data

Program Setup

Write

Base + XXXh

00A0h

Program Command

Write

Program Address

Program Data

Table 7.16 Unlock Bypass Reset

(LLD Function = lld_UnlockBypassResetCmd)

Cycle

Description

Operation

Byte Address

Word Address

Data

Reset Cycle 1

Write

Base + XXXh

0090h

Reset Cycle 2

Write

Base + XXXh

0000h

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