S29GL01GP datasheet(23/81 Pages) SPANSION

23 / 81 page

October 22, 2012 S29GL-P_00_A14

S29GL-P MirrorBit® Flash Family

Data

She e t

Software Functions and Sample Code

Note

1. Any offset within the device works.

2. base = base address.

The following is a C source code example of using the autoselect function to read the manufacturer ID. 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.

/* Here is an example of Autoselect mode (getting manufacturer ID) */

/* Define UINT16 example: typedef unsigned short UINT16; */

UINT16 manuf_id;

/* Auto Select Entry */

*( (UINT16 *)base_addr + 0x555 ) = 0x00AA; /* write unlock cycle 1 */

*( (UINT16 *)base_addr + 0x2AA ) = 0x0055; /* write unlock cycle 2 */

*( (UINT16 *)base_addr + 0x555 ) = 0x0090; /* write autoselect command */

/* multiple reads can be performed after entry */

manuf_id = *( (UINT16 *)base_addr + 0x000 ); /* read manuf. id */

Autoselect exit */

*( (UINT16 *)base_addr + 0x000 ) = 0x00F0; /* exit autoselect (write reset command) */

Table 7.4 Autoselect Entry in System

(LLD Function = lld_AutoselectEntryCmd)

Cycle

Operation

Byte Address

Word Address

Data

Unlock Cycle 1

Write

Base + AAAh

Base + 555h

0x00AAh

Unlock Cycle 2

Write

Base + 555h

Base + 2AAh

0x0055h

Autoselect Command

Write

Base + AAAh

Base + 555h

0x0090h

Table 7.5 Autoselect Exit

(LLD Function = lld_AutoselectExitCmd)

Cycle

Operation

Byte Address

Word Address

Data

Autoselect Exit Command

Write

base + XXXh

0x00F0h

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