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Copyright © 2010 Future Technology Devices International Limited

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Document Reference No.: FT_000254

VNC2 Debug Module Datasheet Version 1.1

Clearance No.: FTDI# 149

3.2 Components

Name

Board

Designator

Description

Debug Connector

CN2

Debug connector, 6-way 2mm pitch female connector.

USB Connector

CN1

USB Mini-B type connector for connecting to PC.

FT232R

U1

FTDI FT232R USB to serial converter device.

2 Port Buffer

U3

2 port buffer device used to convert VNC2 debug signal

from single bit bidirectional signal into separate

transmit and receive signals for FT232R. Data flow

direction control on the buffer is carried out by the

TXEN output from the FT232R. TXEN at logic ‘1’ will

indicate transmit.

Transmit / Receive LED (red)

D1

LED indicating transmit or receive traffic.

Power LED (yellow)

D2

LED indicating power status.

FET switch

Q1

FET switch used to switch power on or off on connector

CN2. FET switch is controlled by PWREN# output from

FT232R.

Table 3.1 Component Descriptions

3.3

Debug Interface Description (CN2)

Pin No.

Name

Type

Description

1

Debug. IF

I/O

Debugger Interface.

2

[Key]

-

Not connected.

3

GND

PWR

Module ground supply pin.

4

RESET#

Output

Connects to VNC2 RESET# pin. This pin may be

used in combination with PROG# and the UART

interface to program firmware into the VNC2

device.

5

PROG#

Output

Connects to VNC2 PROG# pin. This pin is used in

combination with the RESET# pin and the UART

interface to program firmware into the VNC2

device.

6

VCC

5V Output

5V output to V2DIP module (from USB bus power).

Table 3.2 Signal Descriptions

Note: Signal levels on pins 1, 4 and 5 have 3.3V signalling levels to match the VNC2 interface.