CC2510F32RSP datasheet(83/244 Pages) TI

Part #	CC2510F32RSP

Description	Low-Power SoC (System-on-Chip) with MCU, Memory, 2.4 GHz RF Transceiver, and USB Controller

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Manufacturer	TI [Texas Instruments]

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83 / 244 page

CC2510Fx / CC2511Fx

SWRS055F

Page 83 of 241

Figure 21: Flash Write using DMA

When performing DMA flash write while

executing code from within flash memory, the

instruction that triggers the first DMA trigger

event FLASH (TRIG[4:0]=10010) must be

aligned on a 2-byte boundary. Figure 22 shows

an example of code that correctly aligns the

instruction for triggering DMA (Note that this

code is IAR specific). The code below is

shown for

CC2510Fx, but will also work for

CC2511Fx if the include file is being replaced by

ioCC2511.h

; Write flash and generate FLASH DMA trigger

; Code is executed from flash memory

;

#include “ioCC2510.h”

MODULE

flashDmaTrigger.s51

RSEG

RCODE (1)

PUBLIC

halFlashDmaTrigger

FUNCTION

halFlashDmaTrigger, 0203H

halFlashDmaTrigger:

ORL

FCTL, #0x02;

RET

;

END

;

Figure 22: DMA Flash Write Executed from within Flash Memory

12.3.2.2

CPU Flash Write

The CPU can also write directly to the flash

when executing program code from RAM using

unified memory space. The CPU writes data to

the Flash Write Data register, FWDATA. The

flash memory is written each time two bytes

have been written to FWDATA, if a write has

been enabled by setting FCTL.WRITE to 1.

The CPU can poll the FCTL.SWBSY status to

determine when the flash is ready for two new

bytes to be written to FWDATA.

Note that there exist a timeout period of 40 µs

for writing one flash word to FWDATA, thus

writing two bytes to the FWDATA register has

to end within 40 µs after FCTL.SWBSY went

low and also within 40 µs after a write has

been initiated by writing a 1 to FCTL.WRITE

(see Figure 24). Failure to do so will clear the

FCTL.BUSY bit. FADDRH:FADDRL will contain

the address of the location where the write

operation failed. A new write operation can be

started by setting FCTL.WRITE to 1 again and

write two bytes to FWDATA. If one wants to do

the whole write operation over again and not

just start from where it failed, one has to erase

the page, writing the start address to

FADDRH:FADDRL, and setting FCTL.WRITE

to 1 (see Section 12.3.3).

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