6 Channel Capacitive Touch Sensor with 6 LED Drivers
Datasheet
Release Detected
Touch Detected
Normal – untouched
operation
Normal – untouched
X additional pulses after release
operation
(100% - Pulse 2 Min Duty Cycle) *
Brightness
LED
Brightness
. . .
Breathe
and Pulse
Period
(100% - Pulse 2 Max Duty Cycle) * Brightness
(P2_PER)
Figure 5.3 Pulse 2 Behavior with Non-Inverted Polarity
Release Detected
Touch Detected
Normal – untouched
operation
Normal – untouched
operation
X additional pulses after release
Pulse 2 Max Duty Cycle * Brightness
LED
Brightness
. . .
Breathe
and Pulse
Period
Pulse 2 Min Duty Cycle * Brightness
Figure 5.4 Pulse 2 Behavior with Inverted Polarity
5.30 LED Breathe Period Register
Table 5.47 LED Breathe Period Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
5Dh
LED Breathe
Period
BR_
PER6
BR_
PER5
BR_
PER4
BR_
PER3
BR_
PER2
BR_
PER1
BR_
PER0
86h
R/W
-
The LED Breathe Period register determines the overall period of a breathe operation as determined
by the LED_CTL registers (see Table 5.43 - setting 11b). Each LSB represents 32ms so that a setting
of 14h (20d) would represent a period of 640ms. The total range is from 32ms to 4.06 seconds (see
Table 5.45).
APPLICATION NOTE: Due to constraints on the LED Drive PWM operation, any Breathe Period less than 160ms
(05h) may not be achievable. The device will breathe at the minimum period possible as
determined by the period and min / max duty cycle settings.
Revision 1.1 (08-05-09)
SMSC CAP1066
DATA6S0HEET
SMSC [ SMSC CORPORATION ]
