AS3911 datasheet(107/149 Pages) AMSCO

107 / 149 page

ams Datasheet, Confidential: 2013-Oct [2-03]

AS3911 – 107

Appl icatio n I n f o rm a t i o n

Capacitive Sensor Display Register

Figure 98:

Capacitive Sensor Display Register

Note:

At power-up and after Set Default command, content of this register is set to 0.

Auxiliary Display Register

Figure 99:

Auxiliary Display Register

Note:

At power-up and after Set Default command, content of this register is set to 0.

Address 2Fh: Capacitive Sensor Display Register

Type: R

Bit

Name

Default

Function

Comments

7cs_cal4

Capacitive Sensor calibration

value

Binary weighted, step 0.1 pF,

max 3.1 pF

6cs_cal3

5cs_cal2

4cs_cal1

3cs_cal0

2cs_cal_end

1: Calibration ended

1cs_cal_err

1: Calibration error

Address 30h: Auxiliary Display Register

Type: R

Bit

Name

Default

Function

Comments

7a_cha

0: AM

1: PM

Currently selected channel

efd_o

External Field Detector output

5tx_on

1: Transmission is active

osc_ok

1: X-tal oscillation is stable

Indication that x-tal oscillator is

active and its output is stable

3rx_on

1: Receive coder is enabled

2rx_act

1: Receive coder is receiving a message

1nfc_t

1: External Field Detector is active in

peer detection mode

0en_ac

1: External Field Detector is active in RF

collision avoidance mode

AS3911 Datasheet(PDF) 107 Page - ams AG

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