AS3955 datasheet(25/111 Pages) AMSCO

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[v1-01] 2015-Apr-29

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AS3955 − Detailed Description

Figure 25:

Response to Get Version Command

Note(s) and/or Footnote(s):Notes:

1. The most significant 7 bits of the storage size byte are interpreted as an unsigned integer value n. As a result, it codes the total

available user memory size as 2n. If the least significant bit is 0b, the user memory size is exactly 2n. If the least significant bit is 1b,

the user memory size is between 2n and 2n+1.

The user memory is the memory available for user data (Capability Container and lock bits are excluded)

2. The figure below is maintained consistently across the whole AS395x family, where Get Version command is supported.

Figure 26:

Get Version Response, Byte 7

Byte No.

Description

Comment

Fixed Header

00h

Vendor Id

3Fh

ams AG

2Product Type

14h

AS395x

Product Subtype

01h

AS3955

Major Product Version

01h

Minor Product Version

00h

Storage Size

15h

17h

see note (1)

Supported Features

01h or 02h

see note (2)

Get Version

Byte No. 7

Description

00000b: ISO14443A Level 3 supported, max

baudrate 106 kbps, Tunneling and

Extended mode present, Password

protection available, energy

harvesting available

Others: RFU

000b: No wired interface available

001b: SPI slave, passive wake-up available

010b: I²C slave, passive wake-up available

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