NXP Semiconductors LPC1768 - ISP Commands; Unlock <Unlock Code

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User manual Rev. 3 — 19 December 2013 624 of 841
NXP Semiconductors
UM10360
Chapter 32: LPC176x/5x Flash memory interface and programming
32.7 ISP commands
The following commands are accepted by the ISP command handler. Detailed status
codes are supported for each command. The command handler sends the return code
INVALID_COMMAND when an undefined command is received. Commands and return
codes are in ASCII format.
CMD_SUCCESS is sent by ISP command handler only when received ISP command has
been completely executed and the new ISP command can be given by the host.
Exceptions from this rule are "Set Baud Rate", "Write to RAM", "Read Memory", and "Go"
commands.
32.7.1 Unlock <Unlock code>
Table 570. ISP command summary
ISP Command Usage Described in
Unlock U <Unlock Code> Table 571
Set Baud Rate B <Baud Rate> <stop bit> Table 572
Echo A <setting> Table 574
Write to RAM W <start address> <number of bytes> Table 575
Read Memory R <address> <number of bytes> Table 576
Prepare sector(s) for
write operation
P <start sector number> <end sector number> Table 577
Copy RAM to Flash C <flash address> <RAM address> <number of bytes> Table 578
Go G <address> <Mode> Table 579
Erase sector(s) E <start sector number> <end sector number> Table 580
Blank check sector(s) I <start sector number> <end sector number> Table 581
Read Part ID J Table 582
Read Boot Code version K Table 584
Read serial number N Table 585
Compare M <address1> <address2> <number of bytes> Table 586
Table 571. ISP Unlock command
Command U
Input Unlock code: 23130
10
Return Code CMD_SUCCESS |
INVALID_CODE |
PARAM_ERROR
Description This command is used to unlock Flash Write, Erase, and Go commands.
Example "U 23130<CR><LF>" unlocks the Flash Write/Erase & Go commands.