MLX75031 Datasheet, PDF (46/67 Pages) Melexis Microelectronic Systems – Optical Gesture & Proximity Sensing IC

MLX75031
Optical Gesture & Proximity Sensing IC
with Integrated LED Drivers
Datasheet
8.13.5. SetTP register
This register contains some enable signals and defines the pulse duration setting for the Active Light
measurements.
Bit
7
SetTP
-
0x5 Read/Write R
Init
0
6
5
4
3
-
EN_LEDS EN_VSUP
ENS
MON
-
R
R/W
R/W
R
0
1
1
0
2
1
0
TP2 TP1 TP0
R/W R/W R/W
0
1
1
SetTP<7:6>: not implemented, read as '0'
EN_LEDSENS: 1 = enables LED temperature sensing, 0 = disables LED temperature
sensing
EN_VSUPMON: 1 = enables voltage monitoring on VSUP, 0 = disables voltage monitoring
on VSUP
TP<2:0>: pulse duration selection for the Active Light measurements, as defined below :
Bit 2 - TP2
0
0
0
0
1
1
1
1
Bit 1 - TP1
0
0
1
1
0
0
1
1
Bit 0 - TP0
0
1
0
1
0
1
0
1
Pulse width (+/- 8%)
4 µs
9.6 µs
14.4 µs
19.2 µs
24µs
29.6µs
49.6µs
79.2µs
Note : the target pulse width's to be used are: 14.4, 19.2, 24 and 29.6µs.
The smaller and the larger pulse width's are available for engineering purposes only. For the smaller pulse
width's the settling of the LED driver is not guaranteed. For the larger pulse width's the thermal behaviour is
not guaranteed.
REVISION 001 – JANUARY, 2013
39010xxxxx
Page 46 of 46