AS39513 datasheet(72/108 Pages) AMSCO

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[v1-10] 2018-Apr-25

AS39513 − Detailed Description

The details of the AS39513 commands are given in the sections

below.

Inventory Command

Inventory Command Request:

Inventory Command Reply:

After receiving an inventory request, the AS39513 responds

with its data storage format identifier (DSFID) and its 64-bit

unique identifier (UID), both of which are stored in EEPROM.

One slot and multiple slots for anti-collision are supported. The

parameters are a mask length, and a mask value. The mask

length is one byte, and valid values are 0 to 60 when 16 slots

are used and 0 to 64 when 1 slot is used. The length of the mask

value is the number of bits specified in the mask length,

rounded up to the nearest integer number of bytes, with the

MSBs padded with zeros as needed.

The ISO 15693-3 specification, in section 9.2 2, describes a

modulation ignore time (tmit) after the reception of an EOF from

the reader. This is the time for which 10% modulation will be

ignored after an EOF sequence. Manufacturers vary as to which

commands implement this specification and how the ignore

time varies by command. In the AS39513, the tmit parameter is

only applied to the Inventory command. No modulation

masking is used for any of the other commands.

SOF

Flags

Command

Mask Length

Mask Value

CRC

EOF

IFLAGS

0x01

8 bits

0 to 64 bits

16 bits

SOF

Flags

DSFID

UID

CRC

EOF

RFLAGS

8 bits

64 bits

16 bits

2. For more information, please refer to the respective section of ISO/IEC 15693-3 specification (second edition, 2009-04-15).

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