NXP Semiconductors LPC24XX UM10237 - Manual (Page 696)

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User manual Rev. 04 — 26 August 2009 696 of 792
NXP Semiconductors
UM10237
Chapter 30: LPC24XX Flash memory programming firmware
10.9 IAP Status Codes
11. 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 bootloader 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 16–4.12 ). 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 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
Section 4–3.1.1 ) 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.
Table 628. Reinvoke ISP
Command Compare
Table 629. 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.