ST25R3910 datasheet(39/65 Pages) STMICROELECTRONICS

Part #	ST25R3910

Description	AM/PM demodulator

PDF	65 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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DocID029768 Rev 2

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ST25R3910

1.3.3

Configuration Register 2

Address: 02h

Type: RW

Table 10. Configuration Register 2(1)

Bit

Name

Default

Function

Comments

sing

1: Only RFO1 driver will be used

Choose between single and

differential antenna driving

envi

1: Input applied to RFI1 is envelope

RF envelope input

tf2

1: Reduces first stage gain by 11 dB When both bits are set there is a

17 dB gain reduction

tf1

1: Reduces first stage gain by 6 dB

osc

0: 13.56 MHz Xtal

1: 27.12 MHz Xtal

Selector for crystal oscillator

out_cl1

out_cl0

MCU_CLK

Selection of clock frequency on

MCU_CLK output.

In case of “11” MCU_CLK output is

permanently low.

out_cl0

3.39 MHz

6.78 MHz

13.56 MHz

No output

Not used

1. Default setting takes place at power-up and after Set Default command.

ST25R3910 Datasheet(PDF) 39 Page - STMicroelectronics

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