Copyright © 2013 Future Technology Devices International Limited

26

DS_FT311D

USB ANDROID HOST IC Datasheet

Version 1.2

Document No.: FT_000660 Clearance No.: FTDI# 305

8.3 USB to PWM Converter

FT311D

1

2

3

4

5

SHIELD

Ferrite

Bead

GND

GND

3V3

GND

VCCIO

VREGOUT

USBDM

USBDP

1V8 PLL VCC IN

RESET#

100nF

100nF

4.7uF

+

IOBUS4

VCC

3V3

REGULATOR

5V

27R

27R

100nF

3V3

IOBUS0

IOBUS1

IOBUS2

IOBUS3

IOBUS5

IOBUS6

IOBUS7

GND

47pF

47pF

CNFG0

CNFG1

CNFG2

GND

MOTOR

CONTROLLER

PWM_0

PWM_1

PWM_2

PWM_3

3V3

470R

3V3

10k

Figure 8.3 Application Example showing USB to PWM Converter

This example shows the CNFGx pins set for mode 010 – Pulse Width Modulation (PWM).

PWM channel 0 has been wired to a motor controller. This is typical of applications with robotic arms or

moving machinery.

PWM channel 3 has been connected to an LED. This allows the LED to either flash or by altering the PWM

switching frequency the controller can act as a “dimmer switch” to the LED.

The unused channels may be left unterminated.