參數(shù)資料
型號: S29GL01GP90TFIR12
廠商: Spansion Inc.
英文描述: 3.0 Volt-only Page Mode Flash Memory featuring 90 nm MirrorBit Process Technology
中文描述: 3.0伏只頁面模式閃存具有90納米MirrorBit工藝技術(shù)
文件頁數(shù): 28/77頁
文件大?。?/td> 2121K
代理商: S29GL01GP90TFIR12
28
S29GL-P MirrorBit
Flash Family
S29GL-P_00_A7 November 8, 2007
D a t a
S h e e t
( P r e l i m i n a r y )
Software Functions and Sample Code
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 */
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
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