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UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
74 of 1441
NXP Semiconductors
UM10503
Chapter 6: LPC43xx/LPC43Sxx flash programming/ISP and IAP
If any CRP mode is enabled and access to the chip is allowed via the ISP, an unsupported
or restricted ISP command will be terminated with return code
CODE_READ_PROTECTION_ENABLED.
Table 33.
Code Read Protection hardware/software interaction
CRP option
User Code
Valid
P2_7 pin at
reset
JTAG enabled LPC43xx
enters ISP
mode
partial flash
update in ISP
mode
None
No
X
Yes
Yes
Yes
Yes
High
Yes
No
NA
Yes
Low
Yes
Yes
Yes
CRP1
No
x
No
Yes
Yes
Yes
High
No
No
NA
Yes
Low
No
Yes
Yes
CRP2
No
x
No
Yes
No
Yes
High
No
No
NA
Yes
Low
No
Yes
No
CRP3
No
x
No
Yes
No
Yes
x
No
No
NA
NO_ISP
No
x
Yes
Yes
Yes
Yes
x
Yes
No Yes