UMFT231XE Datasheet, PDF (7/18 Pages) Future Technology Devices International Ltd. – UMFT231XE USB to Full-Handshake UART Development Module

UMFT231XE
Version 1.0
Document Reference No.: FT_000652 Clearance No.: FTDI# 294
5 Module Configurations
5.1 Jumper Configuration Options
Jumper No. Setting Status Description
JP1
Shorted
Default
Connects internal 3.3V regulator to VCCIO. This restricts signal drive to only 3.3V
level signals.
Disconnects internal 3.3V regulator connection to VCCIO. This mode allows for the
JP1
Opened
Non-
Default
supply of 1.8V-3.3V power from an external power supply, thus allows the
processing of signals with logic levels between 1.8V and 3.3V. VCCIO can be
adjusted to match the interface requirements of external circuitry.
Table 5.1 – Jumper JP1 Pin Description
Jumper No. Setting Status Description
JP2
Shorted Default Connects VBUS to VCC. This mode is known as “USB-Powered” mode.
JP2
Opened
Non-
Default
Disconnects VBUS to VCC. This allows the supply of power from an external power
supply. This mode is known as “Self-Powered” mode.
Table 5.2 – Jumper JP2 Pin Description
Note: There should never be more than one power output supplied to the same net. If JP2 is fitted when
an external power supply is applied a direct short between two power supplies will be formed, this can
result in damage to the UMFT231XE module and the target circuit.
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