8 Channel Capacitive Touch Sensor with 8 LED Drivers
Datasheet
Touch Detected or
Release Detected
X pulses after touch or after release
Pulse 1 Max Duty Cycle * Brightness
LED
Brightness
Normal – untouched
operation
Normal – untouched
operation
Pulse 1 Min Duty Cycle * Brightness
Pulse Period
(P1_PER)
Figure 5.2 Pulse Behavior with Inverted Polarity
Table 5.45 LED Pulse / Breathe Period Example
SETTING
(HEX)
TOTAL BREATHE / PULSE
PERIOD (MS)
SETTING (DECIMAL)
00h
01h
02h
03h
04h
. . .
7Ch
7Dh
7Eh
7Fh
0
1
32
32
2
64
3
96
4
128
. . .
124
125
126
127
. . .
3,968
4,000
4,032
4.064
5.29 LED Pulse 2 Period Register
Table 5.46 LED Pulse 2 Period Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
LED Pulse 2
Period
P2_
PER6
P2_
PER5
P2_
PER4
P2_
PER3
P2_
PER2
P2_
PER1
P2_
PER0
85h
R/W
-
14h
Revision 1.1 (08-05-09)
SMSC CAP1088
DATA6S0HEET
SMSC [ SMSC CORPORATION ]
