FT4232H-56Q Datasheet, PDF (10/18 Pages) Future Technology Devices International Ltd. – USB Hi-Speed FT4232H Evaluation

FT4232H-56Q Mini Module Datasheet
Version 1.0
D oc ument N o.: FT _001273 C learance N o.: FT D I#491
USB Bus-powered:
1) JP1 is connected VBUS to VCC (CN3, pin 1 to CN3, pin 3). This connection takes the power
from the USB bus (VBUS) and connects it to the voltage regulator input on the FT4232H-56Q Mini
Module. The voltage regulator, in turn, provides V3V3, VPLL and VUSB power inputs to the
FT4232H-56Q chip.
2) JP2 is connected V3V3 to VIO (CN2, pins 1, 3 & 5 to CN2, pins 11 and CN3, pins 12 &
22). This connection provides the correct 3.3VDC operating voltage for VCCIO on the FT4232H-
56Q chip.
USB Self-Powered:
1) Remove the JP1 and JP2 jumper.
2) Leave VBUS (CN3, pin 1) unconnected.
3) Connect an external 5.0VDC power supply to VCC (5.0VDC to CN3, pin 3). This
connection takes power from an external power supply and connects it to the voltage regulator
input on the FT4232H-56Q Mini Module. See the FT4232H data sheet for allowable VCC input
voltage ranges.
4) Connect V3V3 to VIO (CN2, pins 1, 3 & 5 to CN2, pins 11 and CN3, pins 12 & 22). This
connection provides the correct 3.3VDC operating voltage for VCCIO on the FT4232H-56Q chip.
5) Use FT_Prog to change the USB power descriptor to “Self-Powered”. This setting
indicates to the host system that the USB Host port does not need to supply power to the device.
FT_Prog is a utility provided by FTDI to program various features of the FT-series USB client ICs.
In order to access settings for the FT4232H-56Q, FT_Prog is required. FT_PROG is available via
the Utilities section of the FTDI web site.
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