S71WS256NC0BAWE32 SPANSION [SPANSION], S71WS256NC0BAWE32 Datasheet - Page 48

• Manufacturer Part Number: S71WS256NC0BAWE32
• Description: Stacked Multi-Chip Product (MCP)
• Manufacturer: SPANSION [SPANSION]

46
10.5.9
Cycle
Cycle
1
2
1
2
/* Example: Unlock Bypass Entry Command
/* Example: Unlock Bypass Program Command
/* Do while in Unlock Bypass Entry Mode!
/* Example: Unlock Bypass Exit Command */
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.
DQ7: Data# Polling.
bedded Program or Erase algorithm is in progress or completed, or whether a bank is in Erase
Suspend. Data# Polling is valid after the rising edge of the final WE# pulse in the command se-
quence. 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 for approxi-
mately t
During the Embedded Erase Algorithm, Data# polling produces a “0” on DQ7. When the Embed-
ded Erase algorithm is complete, or if the bank 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 t
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.
*( (UINT16 *)bank_addr + 0x555 ) = 0x00AA;
*( (UINT16 *)bank_addr + 0x2AA ) = 0x0055;
*( (UINT16 *)bank_addr + 0x555 ) = 0x0020;
/* At this point, programming only takes two write cycles.
/* Once you enter Unlock Bypass Mode, do a series of like
/* operations (programming or sector erase) and then exit
/* Unlock Bypass Mode before beginning a different type of
/* operations.
*( (UINT16 *)bank_addr + 0x555 ) = 0x00A0;
*( (UINT16 *)pa )
/* Poll until done or error.
/* If done and more to program, */
/* do above two cycles again.
*( (UINT16 *)base_addr + 0x000 ) = 0x0090;
*( (UINT16 *)base_addr + 0x000 ) = 0x0000;
Program Setup Command
Program Command
PSP
Reset Cycle 1
Reset Cycle 2
Description
Description
, then that bank returns to the read mode.
The Data# Polling bit, DQ7, indicates to the host system whether an Em-
Operation
Operation
A d v a n c e
Write
Write
Write
Write
S71WS-Nx0 Based MCPs
*/
*/
= data;
Program Address
Base + xxxh
Base + xxxh
Base + xxxh
Byte Address
Byte Address
*/
*/
*/
/* write unlock cycle 1
/* write unlock cycle 2
/* write unlock bypass command
/* write program setup command
/* write data to be programmed
I n f o r m a t i o n
ASP
, then the bank returns to the read mode.
Program Address
Word Address
Word Address
Base +xxxh
Base +xxxh
Base +xxxh
*/
*/
*/
*/
*/
Program Data
S71WS-N_01_A4 September 15, 2005
00A0h
0090h
0000h
Data
Data
*/
*/
*/
*/
*/