ST25R3916 datasheet(60/157 Pages) STMICROELECTRONICS

60 / 157 page

Application information

ST25R3916/7

60/157

DS12484 Rev 4

4.4.1

Set default

This direct command puts the ST25R3916/7 in the same state as power-up initialization:



performs Stop all activities command



resets all registers to their default state



clears all collision bits

Results of previous calibration and adjust commands are lost. No IRQ due to termination of

direct command is produced.

Clear RSSI

Clears the RSSI bits in the RSSI

display register and restarts the

measurement

Yes

Clear FIFO

Clears FIFO

Yes

Enter Transparent mode

Enters in Transparent mode

Calibrate capacitive

sensor

Calibrates capacitive sensor

Yes

All

Measure capacitance

Measures capacitance between

CSO and CSI pin

Yes

All

Measure power supply

Yes

Start General purpose

timer

Yes

Start Wake-up timer

Yes

All

except wu

Start Mask-receive timer

Starts the mask-receive timer and

squelch operation

Yes

Start No-response timer

Yes

Start PPON2 timer

Yes

Stop No-response timer

Yes

RFU

Not used

Enables R/W access to register

Space-B

Yes

all

Test access

Enable R/W access to Test register

Yes

All

Other

codes

RFU

Not used

1. Defines which Operation control register bits have to be set in order to accept a particular command.

2. Measure amplitude and Measure phase can be used directly from power down mode. In this case the command

temporarily enables the oscillator.

Table 13. List of direct commands (continued)

Code

(hex)

Name

Comments

Chaining

Interrupt after

termination

Operation

mode(1)

ST25R3916 Datasheet(PDF) 60 Page - STMicroelectronics

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