MLX90121

13.56MHz RFID Transceiver

3901090121

Page 20 of 26

Data Sheet

Rev. 007

Jan-2008

12. Configuration Registers

The following tables explain the meaning of the bit configurations in the 13 registers.

Register : AnalogConfig

Address : 0

Bit

Default

Name

Function

7

6

5

4

3

2

1:0

0

0

0

0

0

0

0

XBUFSel

XBUFEnB

TModIndex

RSub-carrier

Reserved

ByPassAll

Reserved

XBUF frequency selection (0 = 6.78MHz, 1 = 13.56MHz )

XBUF Enable (0= Enabled, 1 = Disabled)

Transmission Modulation Index (0 = 100%, 1= 10%)

Reception Sub-carrier (0 = 450K , 1 = 847K) – See notes

Do not use – Should always be configured at 0

Bypass analog chain (0= Connected, 1 = Bypassed) – See notes

Do not use - Should always be configured at 11

Notes

ByPassAll

Demodulation

0

FSK / PSK

1

ASK

RSub-carrier

Sub-carrier frequency

0

423 / 484 kHz

1

847 kHz

Register : PowerState

Address : 1

Bit

Default

Name

Function

7:2

1:0

0

0

Reserved

PowerState

Do not use

Chip Power State – See notes

Notes

Power State [1:0]

Mode

0

0

Idle (oscillator on)

0

1

Transmitter On

1

0

Unused

1

1

Power Down (oscillator off)