DF69 datasheet(10/106 Pages) PADAUK

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DF69

DC Fan Controller

3. DF69 Pin Assignment and Description

Pin Name Buffer Type

Description

PA7/X1

ST/ CMOS

/ Analog

The functions of this pin can be:

(1) Bit 7 of port A. It can be configured as input or output with pull-up resistor.

(2) X1 when crystal oscillator is used.

(3) External interrupt line 2. Both rising edge and falling edge are accepted to request

interrupt service.

(4) Output of PWM generator.

If this pin is used for crystal oscillator, bit 7 of padier register must be programmed “0” to

avoid leakage current. This pin can be used to wake-up system during sleep mode;

however, wake-up and interrupt functions are disabled if bit 7 of padier register is “0”.

PA6/X2

ST / CMOS

/ Analog

The functions of this pin can be:

(1) Bit 6 of port A. It can be configured as input or output with pull-up resistor.

(2) X2 when crystal oscillator is used.

(3) Input of Pulse Capture.

(4) Output of PWM generator.

If this pin is used for crystal oscillator, bit 6 of padier register must be programmed “0” to

avoid leakage current. This pin can be used to wake-up system during sleep mode;

however, wake-up function is also disabled if bit 6 of padier register is “0”.

PA5 /

PRST#

ST / CMOS

The functions of this pin can be:

(1) Bit 5 of port A. It can be configured as input or open-drain output pin. Please notice

that there is no pull-up resistor in this pin.

(2) Hardware reset.

(3) Output of Hall comparator.

(4) Input of Pulse Capture.

This pin can be used to wake-up system during sleep mode; however, wake-up function

is also disabled if bit 5 of padier register is “0”.

Please put 33Ω resistor in series to have

high noise immunity when this pin is in input mode.

PA4/AD9

ST / CMOS

/ Analog

The functions of this pin can be:

(1) Bit 4 of port A. It can be configured as input or output with pull-up resistor.

(2) Channel 9 input of ADC.

(3) Output of PWM generator.

(4) Minus input of general purpose comparator

If this pin acts as analog input, bit 4 of padier register must be programmed “0” to avoid

leakage current. This pin can be used to wake up system during sleep mode; however,

wake-up function from this pin is also disabled when bit 4 of padier register is “0”.

DF69 (MSOP10-118mil)

Page 10 of 106

PDK-DS-DF69_V003 – Apr. 18, 2018

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