TC35680FSG datasheet(12/91 Pages) TOSHIBA

12 / 91 page

TC35680FSG-002/TC35681FSG-002

2019-04-04

2.3. Function of Each Pin

The attribute, the status as output or input, and other functions of each pin are shown in Table 2-1.

The power supply pins are shown in Table 2-6.

Table 2-1 Function of each pin

Pin name

Pin No.

Attribute

Description

QFN

Package

Power supply group

Signal direction

I/O Type

RESETX

VDDIO

Schmitt trigger

Hardware reset input pin.

Low level asserts the reset.

XOIN

VDDCORE1

OSC

Input pin for the reference clock oscillation.

A 32-MHz crystal resonator with accuracy of ± 50 ppm or less should

be connected to the XOIN pin and the XOOUT pin.

The crystal oscillation circuit includes a variable capacitor (a capacitor

array) to adjust the oscillation frequency.

XOOUT

VDDCORE1

OUT

OSC

Output (feedback) pin for the reference clock oscillation.

SLPXOIN

VDDIO

OSC

Input pin for the sleep clock oscillation by a crystal resonator.

A 32.768-kHz crystal resonator with accuracy of ± 500 ppm or less

should be connected to the SLPXOIN pin and the SLPXOOUT pin.

The crystal oscillation circuit includes a variable capacitor (a capacitor

array) to adjust the oscillation frequency.

When an external clock is used, the clock should be input to this pin.

SLPXOOUT

VDDIO

OUT

OSC

Output (feedback) pin for the 32.768-kHz oscillation.

RFIO

VDDCORE1

IN/OUT

Analog

RF signal input and output pin.

The impedance matching of 50

Ω can be done by connecting a proper

capacitor between the RFIO pin and GND.

When this pin is connected to an antenna for communication, a series

capacitor should be connected, because the signal of this pin has a DC

bias. For the details, refer to the “Hardware Application Note” of this

device.

GPIO0

GPIO15

VDDIO

IN/OUT

Pull-up/Pull-down

resistors

Schmitt trigger

General-purpose I/O pins.

Following functions can be set by software;



Switch as input or output.



Connection or disconnection of a pull-up and a pull-down

resistors (Note 1)



Selection of output drivability.



Setting of an interrupt.

The interrupt can also be used to wake up from the Deep Sleep mode

to the Active mode.

For details of the function assignment, the low power consumption

function, and the interrupt, refer to Section 2.4, Section 3.6, and Section

4.6, respectively.

TC35680FSG Datasheet(PDF) 12 Page - Toshiba Semiconductor

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