USB 2.0 Hi-Speed 4-Port Hub Controller
Datasheet
2014 Microchip Technology Inc. DS00001713A-page 19
Note 3.2 The LOCAL_PWR pin is sampled during the configuration state, immediately after negation
of reset, to determine whether the device is bus-powered or self-powered. When
configuration is complete, the latched value will not change until the next reset assertion.
To enable dynamic local power switching, the DYNAMIC_POWER register at location
0x4134 must be programmed with 0x41. If dynamic power switching is not required, the
DYNAMIC_POWER register should be left at the default value of 0xC1. Programming may
be performed through the SMBus interface, or permanently via OTP. Refer to the Protouch
MPT User Manual for additional information.
1
Port 4 Power
Output
PRTPWR4 O8 Enables power to a downstream USB device
attached to Port 4.
0 = Power disabled on downstream Port 4
1 = Power enabled on downstream Port 4
Port 4 Control PRTCTL4 OD8/IS
(PU)
When configured as PRTCTL4, this pin functions
as both the Port 4 power enable output
(PRTPWR4) and the Port 4 over-current sense
input (OCS4_N). Refer to the PRTPWR4 and
OCS4_N descriptions for additional information.
Port 4 Battery
Charging
Configuration
Strap
BC_EN4
IS This strap is used to indicate support of the
battery charging protocol on Port 4. Enabling
battery charging support allows a device on the
port to draw currents per the USB battery
charging specification.
0 = Battery charging is not supported on Port 4
1 = Battery charging is supported on Port 4
See Note 3.4 for more information on
configuration straps.
2
No Connect NC - These pins must be left floating for normal device
operation.
POWER
3
+3.3V Analog
Power Supply
VDDA33 P +3.3V analog power supply. Refer to Chapter 4,
"Power Connections," on page 22 for power
connection information.
2
+3.3V Power
Supply
VDD33 P +3.3V power supply. These pins must be
connected to VDDA33. Refer to Chapter 4,
"Power Connections," on page 22 for power
connection information.
1
+1.2V Core
Power Supply
VDDCR12 P +1.2V core power supply. A 1.0 μF (<1
Ω ESR)
capacitor to ground is required for regulator
stability. The capacitor should be placed as close
as possible to the device. Refer to Chapter 4,
"Power Connections," on page 22 for power
connection information.
Exposed
Pad on
package
bottom
(Figure 3.1)
Ground VSS P Common ground. This exposed pad must be
connected to the ground plane with a via array.
Table 3.1 Pin Descriptions (continued)
NUM PINS NAME SYMBOL
BUFFER
TYPE DESCRIPTION
