Nxp Semiconductors UM10237 User Manual
UM10237_2
© NXP B.V. 2008. All rights reserved.
User manual
Rev. 02 — 19 December 2008
701 of 792
NXP Semiconductors
UM10237
Chapter 31: LPC24XX On-chip bootloader for flashless parts
6.
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.
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.
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.
6.1 Unlock <Unlock code>
6.2 Set Baud Rate <Baud Rate> <stop bit>
Table 631. ISP command summary
ISP Command
Usage
Described in
Unlock
U <Unlock Code>
Set Baud Rate
B <Baud Rate> <stop bit>
Echo
A <setting>
Write to RAM
W <start address> <number of bytes>
Read Memory
R <address> <number of bytes>
Go
G <address> <Mode>
Read Part ID
J
Read Boot code version
K
Compare
M <address1> <address2> <number of bytes>
Table 632. 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 the Go command.
Example
"U 23130<CR><LF>" unlocks the Go command.
Table 633. ISP Set Baud Rate command
Command
B
Input
Baud Rate: 9600 | 19200 | 38400 | 57600 | 115200 | 230400
Stop bit: 1 | 2