EM4056B6CB2RC 데이터 시트보기 (PDF) - EM Microelectronic - MARIN SA

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EM4056B6CB2RC

2KBIT Read/Write with ANTICOLLISION Contactless Identification Device

EM Microelectronic - MARIN SA 

ROM organisation

Address

0000000

0000001

0000010

bit17

B15

B31

L7

Datas

L0 C7

Wp

bit2 bit1

B0

1

B16

1

C0

1

B31-B0 unique code number.

L7-L0

8-bit customer ID, standard version = 65hex, 101dec.

C7 – C0

CRC calculated on bits B31 to B0 and L7 to L0.

(CRC block diagram see figure 4).

Note : EM4056 with different customer ID will also have a different unique code number.

Commands structure

Command

ReadRom

SelToggle

SelTag

DeselTag

Prot

Read

Write

Add

Comp

Start Arbitration

Continue if “0”

Continue if “1”

Abort Arbitration

Code

MSB 0010 LSB

0100

0101

0110

1000

1010

1100

1101

1110

0001

00

11

01 or 10

EM4056

Rp

bit0

0

0

0

CRC Block Diagram

7

MSB

X7

65

X5

4

X4

321

X1

0

LSB

X0=1

Data Input

Exclusive OR

X Shift Register

CRC Generating polynomial = X7+X5+X4+X+1

In uplink the CRC is calculated on all bits of the command (startbit excluded), MSB first.

In dowlink the CRC is calculated on all bits of the answer, first bit sent by the chip first.

Fig. 5

Copyright © 2005, EM Microelectronic-Marin SA

5

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