CAP1214 datasheet(80/107 Pages) MICROCHIP

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Multiple Channel Capacitive Touch Sensor and LED Driver

Datasheet

Revision 1.0 (08-30-10)

SMSC CAP1214

DATASHEET

Bit 7 - LED8_DIR - Controls the direction of the LED8 / GPIO8 pin.

‘0’ (default) - The LED8 / GPIO8 pin is configured as an input and cannot be used to drive an LED.

‘1’ - The LED8 / GPIO8 pin is configured as an output.

Bit 6 - LED7_DIR - Controls the direction of the LED7 / GPIO7 pin.

Bit 5 - LED6_DIR - Controls the direction of the LED6 / GPIO6 pin.

Bit 4 - LED5_DIR - Controls the direction of the LED5 / GPIO5 pin.

Bit 3 - LED4_DIR - Controls the direction of the LED4 / GPIO4 pin.

Bit 2 - LED3_DIR - Controls the direction of the LED3 / GPIO3 pin.

Bit 1 - LED2_DIR - Controls the direction of the LED2 / GPIO2 pin.

Bit 0 - LED1_DIR - Controls the direction of the LED1 / GPIO1 pin.

6.44

LED / GPIO Output Type Register

The LED / GPIO Output Type Register controls the type of output for the LEDx / GPIOx pins that are

configured to operate as outputs. Each pin is controlled by a single bit.

Bit 7 - LED8_OT - Determines the output type of LED8.

‘0’ (default) - The LED8 / GPIO8 pin is an open-drain output with an external pull-up resistor. When

the appropriate bit is set to the “active” state (logic ‘1’), the pin will be driven low. Conversely, when

the bit is set to the “inactive” state (logic ‘0’), the pin will be left in a high-Z state and pulled high

via an external pull-up resistor.

‘1’ - The LEDx / GPIO8 pin is a push-pull output. When driving a logic ‘1’, the pin is driven high.

When driving a logic ‘0’, the pin is driven low.

Bit 6 - LED7_OT - Determines the output type of LED7.

Bit 5 - LED6_OT - Determines the output type of LED6.

Bit 4 - LED5_OT - Determines the output type of LED5.

Bit 3 - LED4_OT - Determines the output type of LED4.

Bit 2 - LED3_OT - Determines the output type of LED3.

Bit 1 - LED2_OT - Determines the output type of LED2.

Bit 0 - LED1_OT - Determines the output type of LED1.

Table 6.64 LED / GPIO Output Type Register

ADDR

R/W

B6B5B4B3

DEFAULT

71h

R/W

LED / GPIO

Output Type

LED8_

LED7_

LED6_

LED5_

LED4_

LED3_

LED2_

LED1_

00h

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