ST10F268 datasheet(17/74 Pages) STMICROELECTRONICS

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ST10F168

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Programming a block of data

The following code is provided as an example to program a block of data. Flash to be programmed is from

address 01’9000h to 01’9FFEh (included). Source data (data to be copied into flash) is located in external

RAM from address 05’1000h (to 05’1FFEh, implicitly) :

; code shown below assumes that flash is mapped in segment 1

; ie. bit ROMS1 = ‘1’ in SYSCON register

; Flash must be enabled, ie. bit ROMEN = ‘1’ in SYSCON.

MOV

R0, #0AA50h

; AA5xh : Multi Word programming command

R0, #01h

; Selects segment 1 in Flash memory

MOV

R1, #09000h

; First Flash Segment Offset Address

MOV

R2, #09FFEh

; Last Flash Segment Offset Address

MOV

R3, #09000h

; Source data address: use DPP2 as

; data page pointer

SCXT

DPP2,#20d

; Source is in page 20 (first page of

; segment 5): save previous DPP2 value

; and load it with source page number

MOV

R4, #050d

; 50ns is 20MHz CPU clock frequency

MOV

R7, #08000h

; R7 used for Flash trigger sequence

#define FCR 08000h

EXTS

#1, #2

; Flash can be mapped in segment 0 or 1

MOV

FCR, R7

; first part

MOV

[R7], R7

; second part

NOP

; WARNING: place 2 NOP operations after

NOP

; the Unlock sequence to avoid all possible

; pipeline conflicts in STEAK programs

POP

DPP2

; restore DPP2

ST10F268 Datasheet(PDF) 17 Page - STMicroelectronics

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