NXP Semiconductors LPC11U3x User Manual

UM10462 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2016. All rights reserved.
User manual Rev. 5.5 — 21 December 2016 423 of 523
NXP Semiconductors
UM10462
Chapter 20: LPC11U3x/2x/1x Flash programming firmware
The signature as it is read from the FMSW0 to FMSW3 registers must be equal to the
reference signature. The algorithms to derive the reference signature is given in
Figure 71
.
Fig 71. Algorithm for generating a 128-bit signature
int128 signature = 0
int128 nextSignature
FOR address = flashpage 0 TO address = flashpage max
{
FOR i = 0 TO 126 {
nextSignature[i] = flashword[i] XOR signature[i+1]}
nextSignature[127] = flashword[127] XOR signature[0] XOR signature[2]
XOR signature[27] XOR signature[29]
signature = nextSignature
}
return signature

NXP Semiconductors LPC11U3x Specifications

General

Brand	NXP Semiconductors
Model	LPC11U3x
Category	Microcontrollers
Language	English