User manual

RPi HUB Module Datasheet

Version 1.0

Document Reference No.: FT_000700 Clearance No.: FTDI# 297

In most cases, the FT2232H pin is connected directly to the associated pin on J1 or J2.

There are also several LEDs available on the FT2232H Hub-I/O to indicate the status of power and USB

hub port. Detailed functions of LEDs are described in Table 3.4.

LED Reference

Designator

Colour

Function Description

POWER

Yellow

Power active to downstream USB ports indicator

PORT1

Red

Overcurrent status of downstream USB port 1 indicator

PORT1

Green

Enumeration status of downstream USB port 1 indicator

PORT2

Green

Enumeration status of downstream USB port 2 indicator

PORT2

Red

Overcurrent status of downstream USB port 2 indicator

Figure 3.4 – Functions of status LEDs on the module

4 Guide to Supplying Power

When RPi HUB Module is connected to Raspberry Pi board it must be powered from external +5V power

supply. The Raspberry Pi board can be powered by connecting P1-02 header to J2-24 on RPi HUB Module.

To date, the Raspberry Pi uses a 140mA fuse on the power line to the USB connector; this fuse will not

allow an adequate amount of current to power the RPi HUB Module from this USB connector.

USB Bus powered configuration may be used with other host devices, such as PCs or laptops. To enable

external power supply feature, switch the jumper JP1 and JP2 to SELF position, pins 2 & 3 shorted for

both jumpers. The maximum total current consumed by the external USB devices on downstream port 1

and 2 is 1A. If the total current exceeds 1A, the fuse on the RPi HUB Module will disconnect the power to

the USB downstream ports. If this occurs then LEDs PORT1 and PORT2 on the module will illuminate red

to indicate over-current status.

When powered from USB bus power, the estimated current consumed by the circuits on the module is

between 100-300mA depending on the application. User should ensure that the host can supply this

current via USB potation.