CAP1014 Datasheet, PDF (71/84 Pages) SMSC Corporation – Multiple Channel Capacitive Touch Sensor and LED Driver

Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
Table 5.61 LED Pulse / Breathe Period Example (continued)
SETTING
(HEX)
04h
...
7Ch
7Dh
7Eh
7Fh
SETTING (DECIMAL)
4
...
124
125
126
127
TOTAL BREATHE / PULSE
PERIOD (MS)
128
...
3,968
4,000
4,032
4.064
5.42 LED Pulse 2 Period Register
ADDR R/W
85h
R/W
REGISTER
LED Pulse 2
Period
Table 5.62 LED Behavior Registers
B7
B6
B5
B4
B3
B2
B1
B0 DEFAULT
-
P2_ P2_ P2_ P2_ P2_
P2_
P2_
PER6 PER5 PER4 PER3 PER2 PER1 PER0
14h
The LED Pulse 2 Period register determines the overall period of a pulse operation as determined by
the LED_CTL registers (see Table 5.59 - setting 10b). 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 5.61).
The Pulse 2 Behavior is shown in Figure 5.3 (non-inverted polarity) and Figure 5.4 (inverted polarity).
Normal –
untouched
operation
LED
Brightness
Touch Detected
(100% - Pulse 2 Min Duty Cycle) *
Brightness
Release Detected
5 additional pulses after release
...
Breathe
and Pulse
Period
(P2_PER)
(100% - Pulse 2 Max Duty Cycle) * Brightness
Figure 5.3 Pulse 2 Behavior with Non-Inverted Polarity
Normal –
untouched
operation
SMSC CAP1014
71
DATASHEET
Revision 1.65 (08-11-09)