S29GL512P10FFI 데이터 시트보기 (PDF) - Spansion Inc.
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S29GL512P10FFI Datasheet PDF : 81 Pages
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Data Sheet
Software Functions and Sample Code
Table 7.7 Write Buffer Program
(LLD Functions Used = lld_WriteToBufferCmd, lld_ProgramBufferToFlashCmd)
Cycle Description
Operation Byte Address Word Address Data
1
Unlock
Write
Base + AAAh
Base + 555h
00AAh
2
Unlock
Write
Base + 555h
Base + 2AAh
0055h
3
Write Buffer Load Command
Write
Sector Address
0025h
4
Write Word Count
Write
Sector Address
Word Count (N–1)h
Number of words (N) loaded into the write buffer can be from 1 to 32 words (1 to 64 bytes).
5 to 36
Load Buffer Word N
Write
Program Address, Word N
Word N
Last
Write Buffer to Flash
Write
Sector Address
0029h
Notes
1. Base = Base Address.
2. Last = Last cycle of write buffer program operation; depending on number of words written, the total number of cycles may be from 6 to
37.
3. For maximum efficiency, it is recommended that the write buffer be loaded with the highest number of words (N words) possible.
The following is a C source code example of using the write buffer program function. Refer to the Spansion
Low Level Driver User’s Guide (available on www.spansion.com) for general information on Spansion Flash
memory software development guidelines.
/* Example: Write Buffer Programming Command
*/
/* NOTES: Write buffer programming limited to 16 words. */
/*
All addresses to be written to the flash in */
/*
one operation must be within the same flash */
/*
page. A flash page begins at addresses
*/
/*
evenly divisible by 0x20.
*/
UINT16 *src = source_of_data;
/* address of source data
*/
UINT16 *dst = destination_of_data;
/* flash destination address
*/
UINT16 wc = words_to_program -1;
/* word count (minus 1)
*/
*( (UINT16 *)base_addr + 0x555 ) = 0x00AA; /* write unlock cycle 1
*/
*( (UINT16 *)base_addr + 0x2AA ) = 0x0055; /* write unlock cycle 2
*/
*( (UINT16 *)sector_address ) = 0x0025; /* write write buffer load command */
*( (UINT16 *)sector_address ) = wc;
/* write word count (minus 1)
*/
for (i=0;i<=wc;i++)
{
*dst++ = *src++; /* ALL dst MUST BE in same Write Buffer */
}
*( (UINT16 *)sector_address ) = 0x0029; /* write confirm command
*/
/* poll for completion */
/* Example: Write Buffer Abort Reset */
*( (UINT16 *)addr + 0x555 ) = 0x00AA; /* write unlock cycle 1
*/
*( (UINT16 *)addr + 0x2AA ) = 0x0055; /* write unlock cycle 2
*/
*( (UINT16 *)addr + 0x555 ) = 0x00F0; /* write buffer abort reset
*/
28
S29GL-P MirrorBit® Flash Family
S29GL-P_00_A14 October 22, 2012
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