Datasheet OXUSB954 Datasheet (OXFORD)

UG-0017 Dec 04

OXUSB954

Development Board

Hardware User Guide

Oxford Semiconductor Limited
25 Milton Park
Abingdon
Oxfordshire
OX14 4SH, UK
(44) 1235 824900

http://www.oxsemi.com

OXUSB954 Development Board Hardware User Guide Oxford Semiconductor Ltd.

All trademarks are the property of their respective owners

© Oxford Semiconductor Limited 2004

The content of this manual is furnished for informational use only, is subject to change without notice, and should not
be construed as a commitment by Oxford Semiconductor Limited. Oxford Semiconductor Limited assumes no
responsibility or liability for any errors or inaccuracies that may appear in this book.

ii Limited NDA—Oxford Semiconductor Ltd. Confidential & Proprietary Information UG-0017 Dec 04

Contents

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v

Revision Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Typographic conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .vi

Development Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Development Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

OXUSB954 Development Board First-Time Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Uploading Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

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Contents OXUSB954 Development Board Hardware User Guide

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iv Limited NDA—Oxford Semiconductor Ltd. Confidential & Proprietary Information UG-0017 Dec 04

Preface

This manual documents the OXUSB954 development board hardware in
the OXUSB954 Development Suite. The OXUSB954 device is the Oxford
Semiconductor USB to quad serial port bridge.



Revision Information

Typographic

Ensure that this is the correct document for your board.

Table I documents the revisions of this manual

Table I Revision Information

Revision Modification

Dec 2004 First publication

In this manual, the conventions listed in Table II apply.

conventions

Table II Typographic Conventions

Convention Meaning

Italic Letters With Initial Capital Letters A cross-reference to another publication

Courier Font Software code, or text typed in via a keyboard

1, 2, 3 A numbered list where the order of list items is significant



A list where the order of items is not significant

Significant additional information



“Title” Cross-refers to another section within the document

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Preface OXUSB954 Development Board Hardware User Guide

Ordering Information

The order code for the OXUSB954 Development Suite is EV-OXUSB954.
Contacting Oxford Semiconductor

Oxford Semiconductor contact details:

Oxford Semiconductor Ltd.

25 Milton Park
Abingdon
Oxfordshire
OX14 4SH

United Kingdom

Website: http://www.oxsemi.com

Telephone: [phone]
Fax: [phone]

Email: [e-mail]

Alternatively, you can contact your local representative.

vi Limited NDA—Oxford Semiconductor Ltd. Confidential & Proprietary Information UG-0017 Dec 04

Chapter 1

Development Board

Introduction The Oxford Semiconductor OXUSB954 bridge device transfers data

between USB and up to four serial peripheral devices. It provides full­speed data transfers and plug-and-play capabilities to peripherals with a
serial port interface, and is ideal for use in high-speed modems or ISDN
terminal adapters. The interface is transparent and requires no firmware
changes, allowing peripherals to interface with USB with minimum
modification.





 OXUSB954 development board

 USB a to b connector cable

 Serial cable DB9 connector cable (straight-through)

 Installation CD containing the OXUSB95x drivers and supplied

bridge application firmware

For details of the installation CD contents, see the accompanying bill-of­materials document.

Follow the instructions in “OXUSB954 Development Board First-Time

Use” on page 6 before plugging in the OXUSB954 development board.

Figure 1 on page 2 shows the OXUSB954 evaluation board.

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Development Board OXUSB954 Development Board Hardware User Guide

Figure 1 OXUSB954 Development Board Showing Connectors

Debug UART P7

13x2 Header HD1

USB Connector
P1

DB9 Serial

Connector P2

Mictor Header J2

DB9 Serial

Connector P3

ATX Power Supply P6

13x2 Header HD1

DB9 Serial
Connector P4

DB9 Serial
Connector P5

Figure 2 on page 2 identifies the principle features on the development

board assembly.

Figure 2 Development Board Features

UART P7

ATX P6

UART P4

UART P5

USB P1

JP2

IC11

SW1

JP1

OXUSB954

UART P2

IC3 IC1

Mictor J2

13x2 Header HD2

13x2 Header HD1

Oscillator
X1

UART P3

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OXUSB954 Development Board Hardware User Guide Development Board

Development Board Features

This section documents the features on the OXUSB954 development
board. For further details, see the OXUSB954 schematics supplied on the
development suite installation CD.

The OXUSB954 development board provides all development hardware
necessary to evaluate its capabilities.

Power Supply

The OXUSB954 evaluation board usually obtains power using the USB
cable supply (P1); however, there is an additional ATX connector (P6)
which can be used with a bench supply if required.

The jumper J1 is used to select the power source. The board as supplied
is configured to use USB cable power.

External Memory

The OXUSB954 development board contains two banks of 8-bit RAM
(IC1, IC3) accessed via the external 16-bit memory interface on the
OXUSB954. The RAM can be configured as 1×8-bit, 2×8-bit or 1×16-bit
memory under software control. See the OXUSB954 data sheet for
further details.



Jumpers

JP1 on the OXUSB954 development board is used to control device
reprogramming as follows:

 If JP1 is fitted & JP2 is not fitted

The device reads and executes the EEPROM application when
the device is powered up or reset (removing and reconnecting the
USB cable resets the device)

 If JP1 is not fitted & JP2 is fitted

The EEPROM can be reprogrammed over the USB interface using
a PC running the Oxford Semiconductor USB uploader utility.
See

“Uploading Code” on page 6 for details

The OXUSB954 development board is supplied pre-programmed with
the bridge application and with JP1 fitted.

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Development Board OXUSB954 Development Board Hardware User Guide

Interfaces

The OXUSB954 development board contains the following interfaces:

 USB connector—for data transfer & reprogramming the

EEPROM; also supplies power to the device

 4 UART connectors—for data transfer

 UART debug header—for serial debugging

 Two 13×2 connectors—for debugging & testing; see Table 3 on

page 4 for pin allocations

 Mictor header—for debugging & testing;

Connectors

There are two 13×2 connectors on the OXUSB954 development board,
HD1 and HD2. providing debugging assistance and test points. All pins
are chip outputs which can be tested and used to debug applications. In
addition, a Mictor header provides debug access to the SRAM interface,
as shown in Tabl e 5 on page 5.

Table 3 details the HD1 connector pins on the OXUSB954 development

board.

Table 3 HD1 Connections

Pin

Number

1 U_SOUT1 O 2 U_DSR2 O

3 U_SIN1 O 4 U_DCD2 O

5U_RTS1 O6U_RI2 O

7U_DTR1 O8U_SOUT3 O

9 U_CTS1 O 10 U_SIN3 O

11 U_DSR1 O 12 U_RTS3 O

13 U_DCD1 O 14 U_DTR3

15 U_RI1 O 16 U_CTS3 O

17 U_SOUT2 O 18 U_DSR3 O

19 U_SIN2 O 20 U_DCD3

21 U_RTS2 O 22 U_RI3 O

23 U_DTR2 O 24 GND O

25 U_CTS2 O 26 GND

Notes:

1 These test pins can be used to monitor the signals on UARTS 1 TO 3.

(1)

Function I/O Pin

Number

Function I/O

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OXUSB954 Development Board Hardware User Guide Development Board

Table 4 lists the HD2 connector pins.

Table 4 HD2 Connections

Pin

Number

Function I/O Pin

Number

Function I/O

1U_SOUT4 O2SDA O

3U_SIN4 O4SCL O

5 U_RTS4 O 6 RXD_DEBUG O

7 U_DTR4 O 8 TXD_DEBUG

9 U_CTS4 O 10 nXRD O

11 U_DSR4 O 12 nXWR O

13 U_DCD4 O 14 nXRAMSEL

15 U_RI4 O 16 nXROMSEL O

17 NC O 18 nXBHE O

19 NC O 20 NC

21 NC O 22 NC O

23 GND O 24 GND O

25 GND O 26 GND

Notes:

1 These test pins can be used to monitor the signals on UART 4, the debug UART and external memory.

Table 5 lists the Mictor header pins.

Table 5 Mictor Header Connections (Sheet 1 of 2)

Pin

Number

Function I/O Pin

Number

Function I/O

1NC O2NC O

3NC O4NC O

5NC O6NC O

7A15 O8D15

9A14 O10D14 O

11 A1 3 O 1 2 D13 O

13 A12 O 14 D12 O

15 A11 O 16 D11 O

17 A10 O 18 D10 O

19 A9 O 20 D9 O

21 A8 O 22 D8 O

23 A7 O 24 D7 O

25 A6 O 26 D6 O

27 A5 O 28 D5 O

29 A4 O 30 D4 O

31 A3 O 32 D3 O

33 A2 O 34 D2 O

35 A1 O 36 D1 O

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Development Board OXUSB954 Development Board Hardware User Guide

Table 5 Mictor Header Connections (Sheet 2 of 2)

OXUSB954
Development
Board First­Time Use

Pin

Number

37 A0 O 38 D0 O

39 GND O 40 GND O

41 GND O 42 GND O

43 GND O

Before plugging in the OXUSB950 development board, run the file
install.exe located on the installation CD in the directory /Drivers.

The install process requires acceptance of the license conditions before it
creates the directory OXUSB_Drivers on the local hard drive and
unpacks the driver files to it. It also copies setup.exe to OXUSB_Drivers.
Run setup.exe when the install is complete.

The board can be plugged in after setup.exe has run, allowing the PC to
recognize it and configure the serial ports.

When the OXUSB954 is connected to a host PC, the COM ports are
configured in the sequence given in Tab le 6 .

Function I/O Pin

Number

Function I/O

Uploading Code





Table 6 PC COM Port Configuration Sequence

OXUSB953 Serial Connector PC COM Port

P4 First COM port allocated

P5 Second COM port allocated

P3 Third COM port allocated

P2 Fourth COM port allocated

Use the Windows Device Manager to see the COM port assigned by the
PC.

The Oxford Semiconductor USB EEPROM uploader utility is used to
upload code to the EEPROM on the OXUSB954 development board. The
utility is provided on the OXUSB950 development kit installation CD.

For details of how to upload code over the USB interface, refer to the
application note Using the USB EEPROM Uploader.

To initiate the upload sequence, jumper JP1 on the OXUSB954
development board must not be fitted and JP2 must be fitted when the
USB cable is plugged in. After the device has initialized, fit JP1 and
remove JP2 to read and execute the EEPROM code.



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The bridge application pre-programmed into the OXUSB954
development board is also supplied on the installation CD in the
directory /OXUSB954_firm.