NXP Semiconductors LPC1768 - IAP Status Codes; JTAG Flash Programming Interface

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User manual Rev. 3 — 19 December 2013 638 of 841
NXP Semiconductors
UM10360
Chapter 32: LPC176x/5x Flash memory interface and programming
32.8.10 IAP Status Codes
32.9 JTAG flash programming interface
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 None.
Description This command is used to invoke the boot loader in ISP mode. It maps boot
vectors, sets PCLK = CCLK / 4, configures UART0 pins Rx and Tx, resets
TIMER1 and resets the U0FDR (see Section 14.4.12
). 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 boot loader 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 Section 4.4.1
) frequency after auto-baud
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.
Table 597. Re-invoke ISP
Command Compare
Table 598. IAP Status Codes Summary
Status
Code
Mnemonic Description
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.