USB 2.0 HSIC Hi-Speed 4-Port Hub Controller
Datasheet
Table 3.1 Pin Descriptions (continued)
BUFFER
NUM PINS
NAME
SYMBOL
TYPE
DESCRIPTION
+1.8-3.3V
Core Power
Supply Input
VDDCOREREG
P
+1.8-3.3V core power supply input to internal
+1.2V regulator. This pin may be connected to
VDD33 for single supply applications when VBAT
equals +3.3V. Running in a dual supply
configuration with VDDCOREREG at a lower
voltage, such as +1.8V, may reduce overall
system power consumption. In dual supply
configurations, 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
+1.2V Core
Power Supply
VDDCR12
P
+1.2V core power supply. In single supply
applications or dual supply applications where
1.2V is not used, 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.
1
1
+1.2V HSIC
Power Supply
Input
VDD12
VSS
P
P
+1.2V HSIC power supply input. Refer to
Chapter 4, "Power Connections," on page 22 for
power connection information.
Exposed
Pad on
Ground
Common ground. This exposed pad must be
connected to the ground plane with a via array.
package
bottom
(Figure 3.1)
Note 3.2 When the device is configured to enable the HSIC upstream port, the USB Product ID
(PID) will be 4604. When the device is configured to enable the USB upstream port, the
USB PID will be 4504.
Note 3.3 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 configuration straps must be augmented with an
external resistor when connected to a load. Refer to Section 6.3, "Device Configuration
Straps," on page 32 for additional information.
SMSC USB4604
19
Revision 1.0 (06-17-13)
DATASHEET
SMSC [ SMSC CORPORATION ]
