Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
Table 5.42 CSx_BN_TH Bit Decode
CSX_BN_TH[1:0]
1
0
THRESHOLD DIVIDE SETTING
0
0
1
1
0
1
0
1
6.25%
12.5% (default)
25%
50%
5.29.1
Button Noise Threshold 1 Register
The Button Noise Threshold 1 register controls the noise threshold for Capacitive Touch Sensors 1-4.
Bits 7-6 - CH4_BN_TH[1:0] - Controls the noise threshold for Capacitive Touch Sensor 4.
Bits 5-4 - CH3_BN_TH[1:0] - Controls the noise threshold for Capacitive Touch Sensor 3.
Bits 3-2 - CH2_BN_TH[1:0] - Controls the noise threshold for Capacitive Touch Sensor 2.
Bits 1-0 - CH1_BN_TH[1:0] - Controls the noise threshold for Capacitive Touch Sensor 1.
5.29.2
Button Noise Threshold 2 Register
The Button Noise Threshold 2 register controls the noise threshold for Capacitive Touch Sensors 5 -
7 and the Grouped sensors.
Bits 7-6 - GR_BN_TH[1:0] - Controls the noise threshold for all grouped Capacitive Touch Sensors.
Bits 5-4 - CH7_BN_TH[1:0] - Controls the noise threshold for Capacitive Touch Sensor 7.
Bits 3-2 - CH6_BN_TH[1:0] - Controls the noise threshold for Capacitive Touch Sensor 6.
Bits 1-0 - CH5_BN_TH[1:0] - Controls the noise threshold for Capacitive Touch Sensor 5.
5.30 Lid Closure Threshold Registers
Table 5.43 Lid Closure Threshold Registers
B7 B6 B5 B4 B3
ADDR
R/W
REGISTER
B2
B1
B0
DEFAULT
Lid Closure
Threshold 1
CS4_LD_TH
[1:0]
CS3_LD_TH
[1:0]
CS2_LD_TH
[1:0]
CS1_LD_TH
[1:0]
3Ah
R/W
AAh
Lid Closure
Threshold 2
CS8_LD_TH
[1:0]
CS7_LD_TH
[1:0]
CS6_LD_TH
[1:0]
CS5_LD_TH
[1:0]
3Bh
3Ch
3Dh
R/W
R/W
R/W
AAh
AAh
0Ah
Lid Closure
Threshold 3
CS12_LD_TH
[1:0]
CS11_LD_TH
[1:0]
CS10_LD_TH
[1:0]
CS9_LD_TH
[1:0]
Lid Closure
Threshold 4
CS14_LD_TH
[1:0]
CS13_LD_TH
[1:0]
-
-
-
-
The Lid Closure Threshold registers control the value of a secondary internal threshold to detect noise
potentially generated by lid closure. If a Capacitive Touch Sensor output exceeds the Lid Closure
SMSC CAP1014
Revision 1.65 (08-11-09)
DATA5S7HEET
SMSC [ SMSC CORPORATION ]
