USB5744 datasheet(13/49 Pages) MICROCHIP

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DS00001855D-page 13

USB5744

Note 3:

Configuration strap values are latched on Power-On Reset (POR) and the rising edge of RESET_N (external

chip reset). Configuration straps are identified by an underlined symbol name. Signals that function as con-

figurations traps must be augmented with an external resistor when connected to a load. Refer to Section

3.4, "Configuration Straps and Programmable Functions" for additional information.

PRT_CTL3

(PU)

Port 3 Power Enable / Overcurrent Sense.

As an output, this signal is an active high control signal used to enable

power to the downstream port 3. As an input, this signal indicates an

overcurrent condition from an external current monitor on USB port 3.

PRT_CTL4

(PU)

Port 4 Power Enable / Overcurrent Sense.

As an output, this signal is an active high control signal used to enable

power to the downstream port 4. As an input, this signal indicates an

overcurrent condition from an external current monitor on USB port 4.

GANG_PWR

(PU)

When pulled high enables gang mode. Gang power pin when used in

gang mode.

TABLE 3-6:

SPI/SMBUS PIN DESCRIPTIONS

Num

Pins

Symbol

Buffer

Type

Description

SPI_CE_N

O12

Active low SPI chip enable output.

GPIO7

I/O12

General purpose input/output 7.

CFG_NON_REM

Non-Removable Port Configuration Strap.

This configuration strap is used to configure the number of non-

removable ports. Refer to Section 3.4.3, "Non-Removable Port Con-

figuration (CFG_NON_REM)" for more information.

See Note 3.

SPI_CLK

SPI clock output to the serial ROM, when configured for SPI opera-

tion.

SMCLK

OD12

SMBus clock pin, when configured for SMBus slave operation.

GPIO4

I/O6

General purpose input/output 4.

SPI_DO

SPI data output, when configured for SPI operation.

SMDAT

I/O12

SMBus data pin, when configured for SMBus slave operation.

GPIO5

I/O6

General purpose input/output 5.

SPI_DI

SPI data input, when configured for SPI operation.

GPIO9

I/O12

General purpose input/output 9.

CFG_BC_EN

Battery Charging Configuration Strap.

This configuration strap is used to enable battery charging. Refer to

Section 3.4.4, "Battery Charging Configuration (CFG_BC_EN)" for

more information.

See Note 3.

TABLE 3-5:

USB PORT CONTROL PIN DESCRIPTIONS (CONTINUED)

Num

Pins

Symbol

Buffer

Type

Description

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