S29WS-P SPANSION [SPANSION], S29WS-P Datasheet - Page 34
S29WS-P
Manufacturer Part Number
S29WS-P
Description
512/256/128 Mb (32/16/8 M x 16 bit) 1.8 V Burst Simultaneous Read/Write MirrorBit Flash Memory
Manufacturer
SPANSION [SPANSION]
Datasheet
1.S29WS-P.pdf
(89 pages)
- Current page: 34 of 89
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32
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 write buffer. */
/* A write buffer begins at addresses evenly divisible */
/* by 0x20.
UINT16 i; */
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 *)dst ) = 0x0025; /* write write buffer load command */
*( (UINT16 *)dst ) = 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 *)base_addr + 0x555 ) = 0x00AA; /* write unlock cycle 1 */
*( (UINT16 *)base_addr + 0x2AA ) = 0x0055; /* write unlock cycle 2 */
*( (UINT16 *)base_addr + 0x555 ) = 0x00F0; /* write buffer abort reset */
D a t a
S h e e t
S29WS-P
( A d v a n c e
I n f o r m a t i o n )
S29WS-P_00_A7 November 8, 2006
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