UMFT230XA Datasheet
Version 1.4
Document Reference No.: FT_000519 Clearance No.: FTDI#269
5.8 Configuring the MTP ROM
The FT230X contains an embedded MTP ROM. This can be used to configure the functions of each CBUS
pin, the current drive on each signal pin, current limit for the USB bus and the other descriptors of the
device. For details on using the MTP ROM/EEPROM programming utility FT_PROG, please see the
FT_PROG User Guide and FT201X datasheet.
When programming the MTP ROM please note:
i) One of the CBUS Pins can be configured as PWREN# in the internal MTP ROM. This can be used to
switch the power supply to the external circuitry.
ii) The Max Bus Power setting of the MTP ROM should specify the maximum current to be drawn from
the USB host/hub when enumerated. For high-powered USB devices the current limit when
enumerated is between 100mA and 500mA, for low-powered USB devices the current limit is
100mA.
5.9 Module Dimensions
2.54
28.32
2.4
7.6
30.1
2.2
L
-01 L = 5.6mm -02 L = 4.6mm
Figure 5.6 – UMFT230XA Module Dimensions
All dimensions are given in millimetres.
The UMFT230XA module exclusively uses lead free components, and is fully compliant with European
Union directive 2002/95/EC.
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