UPD301B datasheet(17/45 Pages) MICROCHIP

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2020 Microchip Technology Inc.

DS00003412A-page 17

UPD301B/C

UPD350 GPIO

GPIO2, GPIO3, GPO4,

GPIO5, GPIO6, GPIO7,

GPIO8, GPIO9

I/O

Refer to UPD350 Datasheet for pin function, peripheral

detail, and characteristics.

(GPIOx, GPO4 in UPD350)

Note:

GPO4, GPIO5, GPIO6, GPIO7, and GPIO9 are

multiplexed with SAMD20 GPIOs. Refer to

Table 3-1 for more information.

Power/Ground

+5V

Port Power

Switch Input

VCONN_IN

+5V VCONN FET power source.

(VS in UPD350)

+3.3V I/O

Power Supply

Input

VDD33_IO_IN

+3.3V I/O power supply input.

(VDD33IO in UPD350)

+3.3V Analog

Power Supply

Input

VDD33_ANA_IN

+3.3V analog power supply input.

(VDDANA in SAMD20)

+3.3V

Always Supply

Input

VDD33_ALW_IN

+3.3V always supply input. (3V3_ALW & VSW in UPD350)

Note:

This pin must be connect to a 2.2 uF capacitor

to ground.

+3.3V

Regulator

Power Supply

Input

VDD33_REG_IN

+3.3V regulator power supply input.

(VDDIN in SAMD20)

+1.8V Core

Voltage Power

Supply Input

VPP18

+1.8V core voltage power supply input.

(VDD18 in UPD350)

+1.8V Digital

Core Power

Supply Output

VDD18_CORE_OUT

+1.8V digital core power supply output. This signal must be

connected to a 1uF capacitor to ground for proper opera-

tion. (VDD18_CAP in UPD350)

+1.2V

Core Power

Supply Output

VDD12_CORE_OUT

+1.2V core power supply output. This signal must be con-

nected to a 1uF capacitor to ground for proper operation.

(VDDCORE in SAMD20)

Ground

VSS

Ground pins.

TABLE 3-2:

PIN DESCRIPTIONS (CONTINUED)

Name

Symbol

Buffer

Type

Description

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