MCS3142 datasheet(34/57 Pages) MICROCHIP

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KEELOQ MPLAB X Plugin

 2014 Microchip Technology Inc.

DS40001746A-page 33

7.3.2

File format

After clicking the Export SQTP button and inputting the range of serial numbers to be

produced, the utility will save a .NUM file. Each line in the this file represents a single

unique KEELOQ device. The line-to-line format of the SQTP file follows the INHX8M

format.

EXAMPLE 7-1:

FILE EXPORT EXAMPLE

The data is byte-addressable, so each HH is one byte. For HCS devices, this directly

corresponds to the device’s memory map which is shown in the data sheet and

programming specification.

The HCS300 has a memory map like this, starting from the lowest address. All of these

fields are 16-bit values.

[KEY_0] [KEY_1] [KEY_2] [KEY_3] [SYNC] [RESERVED] [SER_0]

[SER_1] [SEED_0] [SEED_1] [RESERVED] [CONFIG]

Taking the sample data and adding these brackets to make it more readable:

[B0 B8] [C5 3F] [37 D7] [B3 FF] [00 00] [00 00] [00 00]

[00 00] [17 7A] [A5 50] [00 00] [00 00]

Please consult with your specific encoder data sheet for more information about the

various key generation methods.

TABLE 7-1:

EXPORT FILE FORMAT

Format

BBAAAATTHHHH....HHHCC

18, the number of data bytes

AAAA

0000, the starting address for this line.

All HCS devices will use 0000 as the

starting address

00. Always 0 for 8-bit data, will be 1 for

the “End of File” line

20, the line checksum, appended to the

line

Data

18000000B0B8C53F37D7B3FF0000000000000000177AA5500000000020

BBAAAATTHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHCC

Note: Some devices are word-aligned and some are byte-aligned.

TABLE 7-2:

EXPORT FILE DATA

Format

BBAAAATTHHHH....HHHCC

64-bit Key

0xB0B8C53F37D7

Synchronization

0x0000

Serial

0x00000000

Seed

0x177AA550

Configuration

0x0000

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