W567SXXX

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3. PIN DESCRIPTION

PIN NAME

I/O

FUNCTION

RESETB

In

IC reset input, low active.

XIN

In

32 KHz crystal oscillator with divider for time-keeping application

XOUT

Out

32 KHz crystal oscillator with divider for time-keeping application

OSC

In

Main-clock oscillation input. Only Ring type is used. Connect to GND via the

oscillation resistor.

IP0[3:0] /

IP0[7:4]

In

General input port with pull-high selection. Each 2 input pins can be

programmed to generate interrupt request and used to release IC from

STOP mode.

IP0[3:0] are used as the input of ADC. IP0.0 is the input pin of channel 0

and IP0.3 is the input pin of channel 3, and so on.

BP0[7:0]

I/O

General input/output pins. When used as output pin, it can be open–drain

or CMOS type and it can sink 8mA for high-current applications. When

used as input pin, there may have a pull-high option and generate interrupt

request to release IC from STOP mode.

When BP0[7] is used as output pin, it can be the IR transmission carrier for

IR applications.

BP1[7:0]

I/O

General input/output pins. When used as output pin, it can be open–drain

or CMOS type. When used as input pin, there may have a pull-high option

and generate interrupt request to release IC from STOP mode.

When serial interface is enabled, BP1[6:4] are used as serial interface pins.

BP2[7:0]

I/O

General input/output pins. When used as output pin, it can be open–drain

or CMOS type. When used as input pin, there may have a pull-high option

and generate interrupt request to release IC from STOP mode.

2VRB

Out

Reference-bottom voltage of ADC. Theoretically, the converted codes 0 ~

255 will be uniformly distributed between VRB and AVDD. Voltages below

VRB will be mapped to code 0.

In

Capacitor input for ADC.

Out

Capacitor output for ADC.

Out

ADC regulator output voltage.

DAC0

Out

Current type DAC speaker output 0.

DAC1

Out

Current type DAC speaker output 1.

TEST

In

Test input, internally pulled low. Do not connect during normal operation.

Power

Positive power supply for

µP and peripherals.

Power

Negative power supply for

µP and peripherals.

3VDDOSC

Power

Positive power supply for oscillation.

Power

Negative power supply for oscillation.

Power

Positive power supply for ADC module.

Power

Negative power supply for ADC module.