USB 2.0 HSIC Hi-Speed 4-Port Hub Controller
Datasheet
Table 3.1 Pin Descriptions (continued)
BUFFER
NUM PINS
NAME
SYMBOL
TYPE
DESCRIPTION
Port 3 Power
Output
PRTPWR3
O8
Enables power to a downstream USB device
attached to Port 3.
0 = Power disabled on downstream Port 3
1 = Power enabled on downstream Port 3
1
Port 3 Control
PRTCTL3
PRTPWR4
PRTCTL4
OD8/IS
(PU)
When configured as PRTCTL3, this pin functions
as both the Port 3 power enable output
(PRTPWR3) and the Port 3 over-current sense
input (OCS3_N). Refer to the PRTPWR3 and
OCS3_N descriptions for additional information.
Port 4 Power
Output
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
1
6
Port 4 Control
No Connect
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.
NC
-
These pins must be left floating for normal device
operation.
POWER
Battery
Power Supply
Input
VBAT
P
Battery power supply input. When VBAT is
connected directly to a +3.3V supply from the
system, the internal +3.3V regulator runs in
dropout and regulator power consumption is
eliminated. A 4.7 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.
1
+3.3V Analog
Power Supply
VDDA33
VDD33
P
P
+3.3V analog 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.
3
2
+3.3V Power
Supply
+3.3V power supply. These pins must be
connected to VDDA33. Refer to Chapter 4,
"Power Connections," on page 22 for power
connection information.
Revision 1.0 (06-17-13)
18
SMSC USB4604
DATASHEET
SMSC [ SMSC CORPORATION ]
