xc5vlx330 Xilinx Corp., xc5vlx330 Datasheet - Page 75

• Manufacturer Part Number: xc5vlx330
• Description: Platform Flash Xl High-density Storage And Configuration Device
• Manufacturer: Xilinx Corp.

X-Ref Target - Figure 40
Notes:
1.
2.
3.
DS617 (v2.1) May 14, 2008
Preliminary Product Specification
Any address within the bank can equally be used.
If an error is found, the Status Register must be cleared before further Program/Erase operations.
To read the memory in Asynchronous mode, the CR15 Configuration Register bit must be written to 1.
Status Register
Address & BCh
Address & CBh
Write Block
Write Block
SR7 = 1
SR4 = 1
SR5 = 1
SR5 = 0
Read
Start
End
R
YES
(1)
NO
YES
NO
Command Sequence
Blank Check Error
Figure 40: Blank Check Flowchart and Pseudocode
Error
(2)
(2)
Platform Flash XL High-Density Storage and Configuration Device
www.xilinx.com
blank_check_command (blockToCheck) {
}
writeToFlash (blockToCheck, 0xBC);
writeToFlash (blockToCheck, 0xCB);
/* Memory enters read status state after
the Blank Check Command */
do {
if (status_register.SR4==1) && (status_register.SR5==1)
/* command sequence error */
if (status_register.SR5==1)
/* Blank Check error */
} while (status_register.SR7==0);
status_register = readFlash (blockToCheck);
/* E or G must be toggled */
error_handler () ;
error_handler () ;
/* see note (1) */
ds617_32_102507
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