NXP Semiconductors LPC11U3x

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User manual Rev. 5.5 — 21 December 2016 398 of 523
NXP Semiconductors
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Chapter 20: LPC11U3x/2x/1x Flash programming firmware
20.12 Code Read Protection (CRP)
Code Read Protection is a mechanism that allows the user to enable different levels of
security in the system so that access to the on-chip flash and use of the ISP can be
restricted. When needed, CRP is invoked by programming a specific pattern in flash
location at 0x0000 02FC. IAP commands are not affected by the code read protection.
Important: any CRP change becomes effective only after the device has gone
through a power cycle.
14 4 224 - 239 0x0000 E000 - 0x0000 EFFF no no yes yes yes
15 4 240 - 255 0x0000 F000 - 0x0000 FFFF no no yes yes yes
16 4 256-271 0x0001 0000 - 0x0001 0FFF no no no yes yes
17 4 272-287 0x0001 1000 - 0x0001 1FFF no no no yes yes
18 4 288-303 0x0001 2000 - 0x0001 2FFF no no no yes yes
19 4 304-319 0x0001 3000 - 0x0001 3FFF no no no yes yes
20 4 320-335 0x0001 4000 - 0x0001 4FFF no no no yes yes
21 4 336-351 0x0001 5000 - 0x0001 5FFF no no no yes yes
22 4 352-367 0x0001 6000 - 0x0001 6FFF no no no yes yes
23 4 368-383 0x0001 7000 - 0x0001 7FFF no no no yes yes
24 4 384-399 0x0001 8000 - 0x0001 8FFF no no no no yes
25 4 400-415 0x0001 9000 - 0x0001 9FFF no no no no yes
26 4 416-431 0x0001 A000 - 0x0001 AFFF no no no no yes
27 4 432-447 0x0001 B000 - 0x0001 BFFF no no no no yes
28 4 448-463 0x0001 C000 - 0x0001 CFFF no no no no yes
29 4 464-479 0x0001 D000 - 0x0001 DFFF no no no no yes
30 4 480-495 0x0001 E000 - 0x0001 EFFF no no no no yes
31 4 496-511 0x0001 F000 - 0x0001 FFFF no no no no yes
Table 361. LPC11U3x flash sectors and pages
…continued
Sector
number
Sector
size [kB]
Page
number
Address range
LPC11U34/3xx LPC11U34/4xx LPC11U35 LPC11U36 LPC11U37 /LPC11U37H