Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
Bit 4 - LED5_DR - Determines whether LED5 output is driven high or low.
Bit 3 - LED4_DR - Determines whether LED4 output is driven high or low.
Bit 2 - LED3_DR - Determines whether LED3 output is driven high or low.
Bit 1 - LED2_DR - Determines whether LED2 output is driven high or low.
Bit 0 - LED1_DR - Determines whether LED1 output is driven high or low.
5.37.2
LED Output Control 2
Bit 2 - LED11_DR - Determines whether LED11 is active or not. This LED cannot be linked to a
Capacitive Touch Sensor.
‘0’ (default) - The LED11 output is in High Z and LED will be inactive.
‘1’ - The LED11 output is driven low and the LED will be active.
Bit 1 - LED10_DR - Determines whether LED10 is active or not. If this LED is linked to the Group of
sensors, then LED9 is automatically linked to the Group if sensors.
‘0’ (default) - The LED10 output is in High Z and LED will be inactive. If linked to the Group of
Capacitive Touch sensors, then it will remain inactive when actuated.
‘1’ - The LED10 output is driven low and the LED will be active. If linked to Group of Capacitive
Touch sensors, it will be in High-Z until it is actuated. At this point it will be driven low and the LED
will be active.
Bit 0 - LED9_DR - Determines whether LED9 is active or not.
‘0’ (default) - The LED9 output is in High Z and LED will be inactive. If linked to the Group of
Capacitive Touch sensors, then it will remain inactive when actuated.
‘1’ - The LED9 output is driven low and the LED will be active. If linked to Group of Capacitive
Touch sensors, it will be in High-Z until it is actuated. At this point it will be driven low and the LED
will be active.
5.38 LED Polarity Registers
Table 5.55 LED Polarity Registers
B6 B5 B4 B3
LED7_ LED6_ LED5_ LED4_
ADDR
R/W
REGISTER
B7
B2
B1
B0
DEFAULT
LED Polarity
1
LED8_
POL
LED3_
POL
LED2_
POL
LED1_
POL
75h
R/W
00h
POL
POL
POL
POL
LED Polarity
2
LED11_ LED10_
POL POL
LED9_
POL
76h
R/W
-
-
-
-
-
00h
The LED Polarity registers control the logical polarity of the LED outputs.
APPLICATION NOTE: The polarity controls determine the final LED pin drive. A touch on a linked Capacitive Touch
Sensor is treated in the same way as the LED Output Control bit being set to a logic ‘1’.
APPLICATION NOTE: For LED operation, the duty cycle settings determine the % of time that the LED pin will be
driven to a logic ‘1’ state in a non-inverted system or to a logic ‘0’ state in an inverted system.
The duty cycle settings operate independently of the polarity controls. Therefore, the Max
Duty Cycle settings define the maximum % of time that the LED pin will be driven high in a
non-inverted system while the Min Duty Cycle settings determine the minimum % of time that
the LED pin will be driven high in a non-inverted system.
Revision 1.65 (08-11-09)
SMSC CAP1014
DATA6S4HEET
SMSC [ SMSC CORPORATION ]
