ft232hq Future Technology Devices International Ltd., ft232hq Datasheet - Page 53

• Manufacturer Part Number: ft232hq
• Description: Ft232h Single Channel Hi- Speed Usb To Multipurpose Uart/fifo Ic
• Manufacturer: Future Technology Devices International Ltd.

Document No.: FT_000288
FT232H SINGLE CHANNEL HI-SPEED USB TO MULTIPURPOSE UART/FIFO IC
Datasheet Version 1.0
Clearance No.: FTDI #199
6
FT232H Configurations
The following section illustrates possible USB power configurations for the FT232H.
All USB power configurations illustrated apply to both package options for the FT232H device
6.1 USB Bus Powered Configuration
Bus Powered Application example 1: Bus powered configuration running on +5V
Figure 6.1 Bus Powered Configuration Example 1
Figure 6.1 illustrates the FT232H in a typical USB bus powered design configuration. A USB bus powered
device gets its power from the VBUS (+5V) which is connected to VREGIN. In this application, the
VREGIN is the +5V input to the on chip +3.3V/1.8V regulator. The output of the on chip LDO regulator
(+1.8V) drives pin 38, the FT232H core supply (VCORE) and pin 39, the VCCA.
The output of the on chip LDO regulator (3.3V) supplies 3.3V to the VCCIOs, VPLL and VPHY through
VCCD. Please note that when the FT232H running on +5V (VREGIN), the VCCD becomes an output.
Copyright © 2011 Future Technology Devices International Limited
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