UM232H FTDI, Future Technology Devices International Ltd, UM232H Datasheet - Page 19

• Manufacturer Part Number: UM232H
• Description: MOD EVAL USB - SERIAL - FT232H
• Manufacturer: FTDI, Future Technology Devices International Ltd

Specifications of UM232H

• Main Purpose: Interface, USB 2.0 to Serial FIFO Bridge
• Embedded: No
• Utilized Ic / Part: FT232H
• Primary Attributes: High Speed (480Mbps) Transceiver
• Secondary Attributes: LED Status Indicators
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 768-1103

Figure 7.5 : Self-Powered Configuration – 3V3 External Supply
Figure 7.4 illustrates the UM232H in a typical USB Self-Powered configuration similar to Figure 7.3. The
difference here is that the UM232H module is powered from an external 3.3V supply which is connected to
the 5V0 (+3V3 power supply input can also be supplied to 5V0 pin), VIO and 3V3 pins of the modules.
Please note that when the UM232H running from +3V3, the 3V3 pin becomes an input. The VIO and 3V3
pins connection provides 3V3 to the VCCIOs, VPLL and VPHY on the FT232H chip.
Simularly to the USB-Powered configuation an alternative configuration which utilised PWRSAV# can be
implemented. Figure 7.6 illustrated this configuration.
Figure 7.6 : Alternative Self-Powered Configuration – 3V3 External Supply
Self-Powered Configuration
5V or 3V3
5V or 3V3
MCU
MCU
© Copyright 2011 Future Technology Devices International Ltd
CTS#
RTS#
CTS#
RTS#
RXD
TXD
RXD
TXD
UM232H Single Channel USB Hi-Speed FT232H Development Module
with 3V3 I/O and running on +3.3V external supply:
3V3
3V3
18
J2-14
J2-14
J2-1
J2-1
TXD
RXD
TXD
RTS#
CTS#
RXD
RTS#
CTS#
PU2
PU1
PU2
PU1
VIO
3V3
VIO
3V3
Document Reference No.: FT_000367
USB
5V0
USB
5V0
Clearance No.: FTDI# 198
J1-1
J1-1
ACBUS7
RST#
J1-14
J1-14
Datasheet Version 1.2
3V3
3V3