USB5744
DS00001855E-page 12
2015-2017 Microchip Technology Inc.
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
3.4, "Configuration Straps and Programmable Functions"
for additional information.
1
PRT_CTL3
I
(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.
1
PRT_CTL4
I
(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
I
(PU)
When pulled high enables gang mode. Gang power pin when used in
gang mode.
TABLE 3-5:
SPI/SMBUS PIN DESCRIPTIONS
Num
Pins
Symbol
Buffer
Type
Description
1
SPI_CE_N
O12
Active low SPI chip enable output.
GPIO7
I/O12
General purpose input/output 7.
CFG_NON_REM
I
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-
for more information.
See
1
SPI_CLK
O6
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.
1
SPI_DO
O6
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.
1
SPI_DI
IS
SPI data input, when configured for SPI operation.
GPIO9
I/O12
General purpose input/output 9.
CFG_BC_EN
I
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
TABLE 3-4:
USB PORT CONTROL PIN DESCRIPTIONS (CONTINUED)
Num
Pins
Symbol
Buffer
Type
Description
