Copyright © 2012 Future Technology Devices International Limited

7

DS_UMFT311EV

USB ANDROID HOST MODULE Datasheet

Version 1.0

Document No.: FT_000689 Clearance No.: FTDI# 303

4 Detailed Description of Interface

The defined operation of the FT311D IC is configured using 3 GPIO pins, as shown in the table 4.1. These

GPIO pins define the interface mode required which in turn defines the IO signalling available on the

module connector CON1. This information is available in the FT311D Datasheet

Signal Name

Jumper

selection

FT311D pin

Number

I/O

Type

Description

CONFIG2

JP1

15

Input

Configuration input 2

CONFIG1

JP2

14

Input

Configuration input 1

CONFIG0

JP3

12

Input

Configuration input 0

Table 4.1 : Pins used in interface mode selection

CONFIG2 or CONFIG1 or CONFIG0 is at logic 1 when the corresponding jumper is not present and at

logic 0 when the corresponding jumper is present.

4.1 Interface Mode selection

The interface mode selection is done using the CONFIG[2-0] pins. The CONFIG[2:0] pins have to be set

at this value before the chip is powered on.

Interface Mode

Selection of Interface Mode

CONFIG2

CONFIG1

CONFIG0

GPIO

0

0

0

UART

0

0

1

PWM

0

1

0

I2C Master

0

1

1

SPI Slave

1

0

0

SPI Master

1

0

1

Table 4.2 : Selection of Mode

4.1.1 GPIO Mode

In the GPIO mode the GPIO signals are available at the connector CON1, J3 and J4 as shown in the table

4.3 below.

Signal

Name

Connector

CON1

Connector

J3, J4

FT311D pin

Number

I/O

Type

Description

GPIO(0)

CON1 -10

J3-3

23

IO

GPIO data bit 0, bidirectional

GPIO(1)

CON1 -9

J3-4

24

IO

GPIO data bit 1, bidirectional

GPIO(2)

CON1 -8

J3-5

25

IO

GPIO data bit 2, bidirectional