AS3956 datasheet(24/107 Pages) AMSCO

24 / 107 page

Page 24

ams Datasheet

Document Feedback

[v1-11] 2018-Nov-14

AS3956 − Detailed Description

UID Coding

Anti-collision procedure is based on the Unique Identification

Number (UID). AS3956 supports double size UID (7 bytes). First

three bytes of the UID are hardwired inputs to the PICC Logic

(uid<23:0>). The last 4 bytes of the UID are stored in EEPROM

UID block.

First UID Byte (uid0)

The first byte of UID is Manufacturer ID according to

[ISO7816-6]. It is coded on bits uid<7:0>. ams IC Manufacturer

ID is 3Fh.

Second UID Byte (uid1)

The second byte of UID (uid<15:8>) is reserved for ams’ chip

type (IC Type). Every ams’ RFID tag IC has its own chip type

assigned. AS3956 IC type is 14h.

Third UID Byte (uid2)

The third byte of UID (uid<23:16>) is set to 02h.

Figure 18:

Coding of First Three UID Bytes

Last Four UID Bytes (uid3-uid6)

The last 4 bytes of UID are read from EEPROM (UID block) and

pre-programmed during IC production. Those 4 bytes are

unique, and cannot be modified.

Figure 19:

Last Four UID Bytes

UID Byte

Value (Hex)

uid0

uid1

uid2

UID Byte

UID Block Bits

uid3

b7-b0

uid4

b15-b8

uid5

b23-b16

uid6

b31-b24

AS3956 Datasheet(PDF) 24 Page - ams AG

AS3956 Datasheet(HTML) 24 Page - ams AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL