TN_126 FT4232H Errata Technical Note

Future Technology Devices International Ltd.
TN_126 FT4232H Errata Technical Note
Document Reference No.: FT_000345
Version 1.0
Issue Date: 2010-11-05
The intention of this errata technical note is to give a detailed description of known functional or electrical
issues with the FTDI FT4232H devices.
The current revision of the FT4232H is revision C, released March 2010. At the time of releasing this
Technical Note there are no known issues with this silicon revision.
Future Technology Devices International Limited (FTDI)
Unit1, 2 Seaward Place, Centurion Business Park, Glasgow G41 1HH United Kingdom
Tel.: +44 (0) 141 429 2777 Fax: + 44 (0) 141 429 2758
E-Mail (Support): [email protected] Web: http://www.ftdichip.com
Copyright © 2010 Future Technology Devices International Limited
Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
TABLE OF CONTENTS
1
FT4232H Revision .................................................................................. 2
2
Errata History Table – Functional Problems........................................ 3
2.1
3
Functional Problems of FT4232H ......................................................... 4
3.1
3.1.1
3.2
3.2.1
4
Errata History Table – Electrical and Timming Specification Deviations. ...... 3
Revision A ............................................................................................................ 4
Error reading EEPROM Interface ............................................................................................ 4
Revision B ............................................................................................................ 4
3 Phase clocking in MPSSE mode incorrect ........................................................................... 4
Electrical and Timing specification deviations of FT4232H ............... 6
4.1
4.1.1
Revision A ............................................................................................................ 6
Suspend Timer Failure ............................................................................................................ 6
5
FT4232H Package Markings.................................................................. 7
6
Contact Information............................................................................... 8
Appendix C – Revision History ................................................................. 10
Copyright © 2010 Future Technology Devices International Limited
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Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
1
FT4232H Revision
FT4232H part numbers are listed in Table 1. The letter at the end of date code identifies the device
revision.
The current revision of the FT4232H is revision C, released March 2010. At the time of releasing this
Technical Note there are no known issues with this silicon revision.
Part Number
Package
FT4232HL
64 Pin LQFP
FT4232HQ
64 Pin QFN
Table 1 FT4232H Part Numbers
This errata technical note covers the revisions of FT4232H listed in Table 2.
Revision
Notes
A
First device revision
B
Second device revision
C
Third device revision
Table 2 FT4232H Revisions
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Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
2
Errata History Table – Functional Problems
Functional
Problem
Short description
Errata occurs in
device revision
FT4232H
Error reading EEPROM interface
A
FT4232H
3 Phase clocking in MPSSE mode incorrect
A
2.1 Errata History Table – Electrical and Timming Specification
Deviations.
Deviations
Short description
Errata occurs in device revision
The USB specification requires a
Suspend timer failure (USB
maximum time to suspend of
Chapter 9 Compliance)
3.125ms. The device takes up
A, B
to 4ms to suspend.
Copyright © 2010 Future Technology Devices International Limited
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Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
3
Functional Problems of FT4232H
3.1 Revision A
3.1.1 Error reading EEPROM Interface
Introduction:
The FT4232H uses an external EEPROM to store USB descriptors. These descriptors must be correctly
read for the device to be properly identified and configured.
Problem:
There is an issue that under the right conditions the internal address counter can increment by 2
(incorrectly). This appears as though the data read from the EEPROM has missed a byte.
Workaround:
There are no known workarounds available. This issue is corrected at silicon revision B.
Package specific:
The effected packages are listed in Table 3.
Package
Applicable (Yes/No)
FT4232HL
Y
FT4232HQ
Y
Table 3
3.2 Revision B
3.2.1 3 Phase clocking in MPSSE mode incorrect
Introduction:
The FT4232H introduced a new function to the MPSSE mode called 3 phase clocking to allow data to be
clocked on both edges.
Problem:
3 Phase clocking was not being enabled.
Workaround:
There are no known workarounds available. This issue is corrected at silicon revision B.
Copyright © 2010 Future Technology Devices International Limited
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Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
Package specific:
The effected packages are listed in Table 4.
Package
Applicable (Yes/No)
FT4232HL
Y
FT4232HQ
Y
Table 4
Copyright © 2010 Future Technology Devices International Limited
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Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
4
Electrical and Timing specification deviations of FT4232H
4.1 Revision A
4.1.1 Suspend Timer Failure
Introduction:
The FT4232H has the ability to be put into suspend by the host to conserve power usage.
Problem:
The USB specification chapter 9 compliance tests require the device to go into suspend within 3.125ms.
The device is taking up to 4ms to enter suspend state.
Workaround:
There are no known workarounds available. This issue is corrected at silicon revision C.
Package specific:
The effected packages are listed in Table 5.
Package
Applicable (Yes/No)
FT4232HL
Y
FT4232HQ
Y
Table 5
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Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
5
FT4232H Package Markings
FT4232H is available in a RoHS Compliant package, 64 pin LQFP and 64 pin QFN. An example of the
markings on the package is shown in Figure 3-x.
Figure 5-1 Package Markings – FT4232HQ
Figure 5-2 Package Markings – FT4232HL
Copyright © 2010 Future Technology Devices International Limited
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Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
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Contact Information
Head Office – Glasgow, UK
Future Technology Devices International Limited
Unit 1, 2 Seaward Place, Centurion Business Park
Glasgow G41 1HH
United Kingdom
Tel: +44 (0) 141 429 2777
Fax: +44 (0) 141 429 2758
E-mail (Sales) [email protected]
E-mail (Support) [email protected]
E-mail (General Enquiries) [email protected]
Web Site URL http://www.ftdichip.com
Web Shop URL http://www.ftdichip.com
Branch Office – Taipei, Taiwan
Future Technology Devices International Limited (Taiwan)
2F, No 516, Sec. 1 NeiHu Road
Taipei 114
Taiwan, R.O.C.
Tel: +886 (0) 2 8797 1330
Fax: +886 (0) 2 8751 9737
E-mail (Sales)
[email protected]
E-mail (Support)
[email protected]
E-mail (General Enquiries) [email protected]
Web Site URL
http://www.ftdichip.com
Branch Office – Hillsboro, Oregon, USA
Future Technology Devices International Limited (USA)
7235 NW Evergreen Parkway, Suite 600
Hillsboro, OR 97123-5803
USA
Tel: +1 (503) 547 0988
Fax: +1 (503) 547 0987
E-Mail (Sales)
[email protected]
E-Mail (Support) [email protected]
E-Mail (General Enquiries) [email protected]
Web Site URL
http://www.ftdichip.com
Branch Office – Shanghai, China
Future Technology Devices International Limited (China)
Room 408, 317 Xianxia Road,
ChangNing District,
ShangHai, China
Tel: +86 (21) 62351596
Fax: +86(21) 62351595
E-Mail (Sales): [email protected]
E-Mail (Support): [email protected]
E-Mail (General Enquiries): [email protected]
Web Site URL: http://www.ftdichip.com
Copyright © 2010 Future Technology Devices International Limited
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Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
Distributor and Sales Representatives
Please visit the Sales Network page of the FTDI Web site for the contact details of our distributor(s) and
sales representative(s) in your country.
Neither the whole nor any part of the information contained in, or the product described in this manual, may be adapted or reproduced
in any material or electronic form without the prior written consent of the copyright holder. This product and its documentation are
supplied on an as-is basis and no warranty as to their suitability for any particular purpose is either made or implied. Future Technology
Devices International Ltd will not accept any claim for damages howsoever arising as a result of use or failure of this product. Your
statutory rights are not affected. This product or any variant of it is not intended for use in any medical appliance, device or system in
which the failure of the product might reasonably be expected to result in personal injury. This document provides preliminar y
information that may be subject to change without notice. No freedom to use patents or other intellectual property rights is implied by
the publication of this document. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park,
Glasgow G41 1HH United Kingdom. Scotland Registered Number: SC136640
Copyright © 2010 Future Technology Devices International Limited
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Document Reference No.: FT_000345
TN_126 FT4232H Errata Technical Note
Version 1.0
Clearance No.: FTDI# 188
Appendix C – Revision History
Version 1.0
First Release
05/11/2010
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