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[v1-01] 2019-Aug-20

TMG49037 − Register Description

Proximity/Gesture Baseline Registers

(0xD0 − 0xD3)

After proximity/gesture calibration is complete, the user may

define a number of consecutive proximity cycles for which

PDATA is averaged. The number of consecutive PDATA cycles to

be averaged is defined by PXDCAVG_BASELINE_WINDOW

(0xD9[2:0]). Averaging will repeat after every window of PDATA

cycles. The latest averaged result is stored in the PBSLN_MEAS

field.

The second proximity baseline field, PBSLN, is first updated at

the end of proximity/gesture calibration. This value does not

change unless the user sets. PXDCAVG_AUTO_BASELINE

(0xD9[3]) to 1. If asserted, PBSLN will be updated with the value

of PBSLN_MEAS whenever PBSLN_MEAS is less than PBSLN. In

addition, a multiple of PBSLN is used at the end of the

calibration routine to set the gesture entry and exit thresholds

if the user sets. PXDCAVG_AUTO_GTHR field (0xD9[7]) to 1. The

multiplication factor for setting the entry and exit thresholds is

user-defined in the AUTO_GTHR_IN_MULT (0xDA[3:0]).

Figure 60:

Proximity/Gesture Baseline Registers

Field

Bits

Description

PBSLN_MEAS

0xD0

7:0

Measured baseline low byte

0xD1

15:8

Measured baseline high byte

PBSLN

0xD2

7:0

Stored baseline low byte

0xD3

15:8

Stored baseline high byte

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