MAX66140 Maxim, MAX66140 Datasheet - Page 5
MAX66140
Manufacturer Part Number
MAX66140
Description
The MAX66140 combines 1024 bits of user EEPROM with secure hash algorithm (SHA-1) challenge-and-response authentication (ISO/IEC 10118-3 SHA-1), a 64-bit unique identifier (UID), one 64-bit secret, and a 13
Manufacturer
Maxim
Datasheet
1.MAX66140.pdf
(21 pages)
Figure 5. ISO 15693 Frame Format
The communication between master and MAX66140
(slave) is based on the exchange of data packets. The
master initiates every transaction; only one side (master
or slaves) transmits information at any time. Each data
packet begins with a start-of-frame (SOF) pattern and
ends with an end-of-frame (EOF) pattern. A data packet
with at least 3 bytes between SOF and EOF is called a
SOF
ISO 15693 Communication
1 OR MORE DATA BYTES
_______________________________________________________________________________________
ABRIDGED DATA SHEET
ISO 15693-Compliant Secure Memory
Concept
CRC (LSB)
frame (Figure 5). The last 2 bytes of an ISO 15693
frame are an inverted 16-bit CRC of the preceding data
generated according to the CRC-16-CCITT polynomial.
This CRC is transmitted with the LSB first. For more
details on the CRC-16-CCITT, refer to ISO 15693 Part 3,
Annex C.
For transmission, the frame information is modulated on
a carrier frequency, which in the case of ISO 15693 is
13.56MHz. The subsequent paragraphs are a concise
description of the required modulation and coding. For
CRC (MSB)
EOF
TIME
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