6 go Page 704: Table 31–637, Table 31–638, Table 31–640, Nxp semiconductors
Page 704: Table 31–637, Table 31–638, Table 31–640, Nxp semiconductors
UM10237_4
© NXP B.V. 2009. All rights reserved.
User manual
Rev. 04 — 26 August 2009
704 of 792
NXP Semiconductors
UM10237
Chapter 31: LPC24XX On-chip bootloader for flashless parts
6.6 Go
6.7 Read Part Identification number
In addition to the part identification numbers, the user can determine the die revision by
reading the register contents at address 0x0007 E070. The register value is encoded as
follows: 0x0 corresponds to revision ‘—’, 0x01 corresponds to revision A, 0x02
corresponds to revision B,..., 0x1A corresponds to revision Z. On all LPC24XX parts, this
feature is implemented starting with die revision C, so the register read will yield a value of
0x03 (for revision C) or larger.
6.8 Read Boot code version number
Table 637. ISP Go command
Command
G
Input
Address:
RAM address from which the code execution is to be started. This
address should be on a word boundary.
Mode:
T (Execute program in Thumb Mode) | A (Execute program in ARM mode).
Return Code
CMD_SUCCESS |
ADDR_ERROR |
ADDR_NOT_MAPPED |
CMD_LOCKED |
PARAM_ERROR |
CODE_READ_PROTECTION_ENABLED
Description
This command is used to execute a program residing in RAM memory. It may not
be possible to return to the ISP command handler once this command is
successfully executed.
Example
"G 0 A
Table 638. ISP Read Part Identification command
Command
J
Input
None.
Return Code
CMD_SUCCESS followed by part identification number in ASCII (see
“LPC24XX part identification numbers”
Description
This command is used to read the part identification number.
Table 639. LPC24XX part identification numbers
Device
ASCII/dec coding
Hex coding
LPC2420
302049073
0x1200 E731
LPC2460
369164080
0x1600 FF30
LPC2470
386006832
0x1701 FF30
Table 640. ISP Read Boot Code version number command
Command
K
Input
None
Return Code
CMD_SUCCESS followed by 2 bytes of boot code version number in ASCII format.
It is to be interpreted as
Description
This command is used to read the boot code version number.