Datasheet

8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
Revision 1.32 (01-05-12) 74 SMSC CAP1188
DATASHEET
5.33 LED Pulse 2 Period Register
The LED Pulse 2 Period register determines the overall period of a pulse operation as determined by
the LED_CTL registers (see Table 5.52 - setting 10b). The LSB represents 32ms so that a setting of
Figure 5.2 Pulse 1 Behavior with Inverted Polarity
Table 5.54 LED Pulse / Breathe Period Example
SETTING
(HEX) SETTING (DECIMAL)
TOTAL BREATHE / PULSE
PERIOD (MS)
00h 0 32
01h 1 32
02h 2 64
03h 3 96
. . . . . . . . .
7Dh 125 4000
7Eh 126 4032
7Fh 127 4064
Table 5.55 LED Pulse 2 Period Register
ADDR R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT
85h R/W
LED Pulse 2
Period
-
P2_
PER6
P2_
PER5
P2_
PER4
P2_
PER3
P2_
PER2
P2_
PER1
P2_
PER0
14h
Normal – untouched
operation
Normal – untouched
operation
Touch Detected or
Release Detected
Pulse 1 Min Duty Cycle * Brightness
X pulses after touch or after release
Pulse Period
(P1_PER)
Pulse 1 Max Duty Cycle * Brightness
LED
Brightness