Nxp Semiconductors UM10237 用户手册

UM10237_2

© NXP B.V. 2008. All rights reserved.

 

Debug tools can write parts of the Flash image to the RAM and then execute the IAP call 
"Copy RAM to Flash" repeatedly with proper offset.

Return Code

None

Result

Description

This command is used to invoke the bootloader in ISP mode. It maps boot 
vectors, sets PCLK = CCLK / 4, configures UART0 pins Rx and Tx, restets 
TIMER1 and resets the U0FDR (see 

). This command may be 

used when a valid user program is present in the internal Flash memory and the 
P2.10 pin is not accessible to force the ISP mode. The command does not disable 
the PLL hence it is possible to invoke the bootloader when the part is running off 
the PLL. In such case the ISP utility should pass the CCLK (crystal or PLL output 
depending on the clock source selection 

) frequency after 

autobaud handshake.

Another option is to disable the PLL and select the IRC as the clock source before 
making this IAP call. In this case frequency sent by ISP is ignored and IRC and 
PLL are used to generate CCLK = 14.748 MHz.

0

CMD_SUCCESS

Command is executed successfully.

1

INVALID_COMMAND

Invalid command.

2

SRC_ADDR_ERROR

Source address is not on a word boundary.

3

DST_ADDR_ERROR

Destination address is not on a correct boundary.

4

SRC_ADDR_NOT_MAPPED

Source address is not mapped in the memory map. 
Count value is taken in to consideration where 
applicable.

5

DST_ADDR_NOT_MAPPED

Destination address is not mapped in the memory 
map. Count value is taken in to consideration where 
applicable.

6

COUNT_ERROR

Byte count is not multiple of 4 or is not a permitted 
value.

7

INVALID_SECTOR

Sector number is invalid.

8

SECTOR_NOT_BLANK

Sector is not blank.

9

SECTOR_NOT_PREPARED_
FOR_WRITE_OPERATION

Command to prepare sector for write operation was 
not executed.

10

COMPARE_ERROR

Source and destination data is not same.

11

BUSY

Flash programming hardware interface is busy.