UM10462 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2016. All rights reserved.
User manual Rev. 5.5 — 21 December 2016 415 of 523
NXP Semiconductors
UM10462
Chapter 20: LPC11U3x/2x/1x Flash programming firmware
20.14.7
Comp
are <address1>
<address2> <no of bytes>
20.14.8 Reinvoke ISP
20.14.9 ReadUID
Table 389. IAP Compare command
Command Compare
Input Command code: 56 (decimal)
Param0(DST): Starting flash or RAM address of data bytes to be compared. This
address should be a word boundary.
Param1(SRC): Starting flash or RAM address of data bytes to be compared. This
address should be a word boundary.
Param2: Number of bytes to be compared; should be a multiple of 4.
Status code CMD_SUCCESS |
COMPARE_ERROR |
COUNT_ERROR (Byte count is not a multiple of 4) |
ADDR_ERROR |
ADDR_NOT_MAPPED
Result Result0: Offset of the first mismatch if the status code is COMPARE_ERROR.
Description This command is used to compare the memory contents at two locations.
The result may not be correct when the source or destination includes any
of the first 512 bytes starting from address zero. The first 512 bytes can be
re-mapped to RAM.
Table 390. Reinvoke ISP
Command Compare
Input Command code: 57 (decimal)
Status code None
Result None.
Description This command is used to invoke the bootloader in ISP mode. It maps boot
vectors, sets PCLK = CCLK, configures UART pins RXD and TXD, resets
counter/timer CT32B1 and resets the U0FDR (see Table 247
). This command
may be used when a valid user program is present in the internal flash memory
and the PIO0_1 pin is not accessible to force the ISP mode.
Table 391. IAP ReadUID command
Command Compare
Input Command code: 58 (decimal)
Status code CMD_SUCCESS
Result Result0: The first 32-bit word (at the lowest address).
Result1: The second 32-bit word.
Result2: The third 32-bit word.
Result3: The fourth 32-bit word.
Description This command is used to read the unique ID.
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