UPD301B datasheet(16/45 Pages) MICROCHIP

16 / 45 page

UPD301B/C

DS00003412A-page 16



2020 Microchip Technology Inc.

3.2

Pin Descriptions

This sections details the functions of the various device signals.

TABLE 3-2:

PIN DESCRIPTIONS

Name

Symbol

Buffer

Type

Description

USB Type-C™

Configuration

Channel 1

CC1

AIO

Configuration Channel (CC) used in the discovery, configu-

ration and management of connections across a USB

Type-C cable. (CC1 in UPD350)

Configuration

Channel 2

CC2

AIO

Configuration Channel (CC) used in the discovery, configu-

ration and management of connections across a USB

Type-C cable. (CC2 in UPD350)

VBUS

Detection

VBUS_DET_IN

AIO

Scaled down version of VBUS input used for VBUS detec-

tion. Tie this signal to VBUS via a resistor divider.

(VBUS_DET in UPD350)

SPI Interface

SPI Clock

SPI_CLK

SPI clock. The maximum supported SPI clock frequency is

8 MHz. (SPI_CLK in UPD350 and PA09 in SAMD20)

SPI Data

Master In /

Slave Out

SPI_MISO

I/O8

SPI data master in, slave out.

(SPI_DO in UPD350 and PA08 in SAMD20)

SPI Data

Master Out /

Slave In

SPI_MOSI

SPI data master out / slave in. This pin must be connected

SPI_MOSI_SI for proper operation. (PA11 in SAMD20)

SPI Data

Slave In

SPI_MOSI_SI

SPI data slave in. This pin must be connected to

SPI_MOSI

for proper operation.

(SPI_DI in UPD350 and PA07 in SAMD20)

SPI Chip

Enable 0

SPI_SS0

Active low SPI chip enable input for UPD301B/C.

(SPI_CS_N in UPD350 and PA10 in SAMD20)

SPI Interrupt 0

SPI_IRQ_N0

SPI interrupt indicating request for service from optional

external UPD350.

(IRQ_N in UPD350 and PA14 in SAMD20)

Serial Wire Debug Interface

Serial Wire

Debug Clock

SWCLK

Serial wire debug clock.

(PA30 in SAMD20)

Serial Wire

Debug Data

SWDIO

I/O

Serial wire debug bidirectional data.

(PA31 in SAMD20)

Miscellaneous

System Reset

Input

RESET_N_IN

Active low SAMD20 system reset input. This reset is used

for reset of the SAMD20 portion of the UPD301B/C by a

companion MCU. (RESET in SAMD20)

System Reset

Common

RESET_N_COM

Active low UPD350 system reset input. This reset is used

for reset of the UPD350 portion of the UPD301B/C by a

companion MCU. (RESET_N in UPD350)

General Purpose I/Os

Misc.

SAMD20E I/O

PA00, PA01, PA02, PA03,

PA04, PA05, PA06, PA15,

PA16, PA17, PA18, PA19,

PA22, PA23, PA27, PA28

I/O

Refer to SAMD20E Datasheet for pin function, peripheral

detail, and characteristics.

(PAxx in SAMD20)

Note:

PA18, PA19, PA22, PA23, and PA27 are multi-

plexed with UPD350 GPIOs. Refer to Table 3-1

for more information.

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