29PL256N datasheet(53/74 Pages) SPANSION

53 / 74 page

June 6, 2007 S29PL-N_00_A5

S29PL-N MirrorBit

™ Flash Family

Da ta

Shee t

(Prelim i nar y )

Software Functions and Sample Code

The following are C functions and source code examples of using the Secured Silicon Sector Entry, Program,

and exit commands. Refer to the Spansion Low Level Driver User Guide (available soon on

www.spansion.com) for general information on Spansion Flash memory software development guidelines.

Note

Base = Base Address.

/* Example: SecSi Sector Entry Command */

*((UINT16 *)base_addr + 0x555) = 0x00AA;

/* write unlock cycle 1

*((UINT16 *)base_addr + 0x2AA) = 0x0055;

/* write unlock cycle 2

*((UINT16 *)base_addr + 0x555) = 0x0088;

/* write Secsi Sector Entry Cmd

Note

Base = Base Address.

/* Once in the SecSi Sector mode, you program */

/* words using the programming algorithm.

Note

Base = Base Address.

/* Example: SecSi Sector Exit Command */

*((UINT16 *)base_addr + 0x555) = 0x00AA;

/* write unlock cycle 1

*((UINT16 *)base_addr + 0x2AA) = 0x0055;

/* write unlock cycle 2

*((UINT16 *)base_addr + 0x555) = 0x0090;

/* write SecSi Sector Exit cycle 3 */

*((UINT16 *)base_addr + 0x000) = 0x0000;

/* write SecSi Sector Exit cycle 4 */

Table 10.2 Secured Silicon Sector Entry

(LLD Function = lld_SecSiSectorEntryCmd)

Cycle

Operation

Word Address

Data

Unlock Cycle 1

Write

Base + 555h

00AAh

Unlock Cycle 2

Write

Base + 2AAh

0055h

Entry Cycle

Write

Base + 555h

0088h

Table 10.3 Secured Silicon Sector Program

(LLD Function = lld_ProgramCmd)

Cycle

Operation

Word Address

Data

Unlock Cycle 1

Write

Base + 555h

00AAh

Unlock Cycle 2

Write

Base + 2AAh

0055h

Program Setup

Write

Base + 555h

00A0h

Program

Write

Word Address

Data Word

Table 10.4 Secured Silicon Sector Exit

(LLD Function = lld_SecSiSectorExitCmd)

Cycle

Operation

Word Address

Data

Unlock Cycle 1

Write

Base + 555h

00AAh

Unlock Cycle 2

Write

Base + 2AAh

0055h

Exit Cycle

Write

Base + 555h

0090h

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