ST25R3911B datasheet(86/116 Pages) STMICROELECTRONICS

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1.3.45

Gain reduction state register

Address: 2Dh

Type: R

Table 75. Gain reduction state register

Bit

Name

Default Function

Comments(1)

gs_am_3 -

MSB

Actual gain reduction of second stage of AM channel (including register gain reduction,

squelch and AGC)

gs_am_2 -

gs_am_1 -

gs_am_0 -

LSB

gs_pm_3 -

MSB

Actual gain reduction of second stage of PM channel (including register gain reduction,

squelch and AGC)

gs_pm_2 -

gs_pm_1 -

gs_pm_0 -

LSB

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

1.3.46

Capacitive sensor control register

Address: 2Eh

Type: RW

Table 76. Capacitive sensor control register

Bit

Name

Default

Function

Comments(1)

cs_mcal4

Manual calibration value.

All 0 value enables automatic calibration mode

Binary weighted, step 0.1 pF, max 3.1 pF

cs_mcal3

cs_mcal2

cs_mcal1

cs_mcal0

cs_g2

000: 2.8 V/pF

001: 6.5 V/pF

010: 1.1 V/pF

100: 0.5 V/pF

110: 0.35 V/pF

Others: Not used

Capacitor sensor gain typical values

cs_g1

cs_g0

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

ST25R3911B

Registers

DS11793 - Rev 6

page 86/116

ST25R3911B Datasheet(PDF) 86 Page - STMicroelectronics

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