FT905 datasheet(45/56 Pages) FTDI

Part #	FT905

Description	The FT905 series contains FT905, FT906, FT907 and FT908 which is a complete System-On-Chip 32-bit RISC microcontroller for embedded applications featuring a high level of integration and low power consumption.

PDF	56 Pages

Scroll/Zoom	100%

Manufacturer	FTDI [Future Technology Devices International Ltd.]

Direct Link	http://www.ftdichip.com

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45 / 56 page

FT905

_6_7_8/6/7/8 Embedded Microcontroller Datasheet

Version 1.0

Document No.: FT_001131 Clearance No.: FTDI#422

gets reference voltage from DRREF or HRREF with an external reference resistor R (12 KΩ

±1%) respective connected to GND.

The USB2.0 host controller will provide +5V power voltage output for VBUS and go through

PSW_N signal to control power switching on/off.

6.5 10/100 Mb/s Ethernet Interface

Figure 6-7 shows the 10/100 Mb/s Ethernet port configuration via the transmit (TXON & TXOP)

and receive (RXIN & RXIP) differential pair pins.

RXIN

RXIP

RJ45

10/100 Mb/s

Ethernet

RD-

TXON

TXOP

GND

RREFSET

FT905

ENET_LED1/GPIO5

ENET_LED0/GPIO4

VETH3V3

1:1 Magnetics

Transformer

RD+

TD-

TD+

Figure 6-7 10/100 Mb/s Ethernet interface

The FT905 Ethernet connection to a termination network should go through 1:1 magnetics

transformer and an RJ-45. For space saving, the magnetics and RJ-45 may be a single

integrated component. The system shall provide +3.3V power supply for VETH3V3. The

internal Regulator will generate +1.2V output on VOUT2. The RREFSET connects an external

resistor R (12 KΩ ±1%) to GND to provide a reference voltage for the Ethernet transceiver.

There are two Ethernet LEDs output for TX/RX transmission, Full-duplex/Half-duplex, Collision,

Link or 10/100 Mb/s Speed indication. The required function should be set in the chip registers

before using the LED indicator.

FT905 Datasheet(PDF) 45 Page - Future Technology Devices International Ltd.