TN_130 FT232H Errata Technical Note
Document Reference No.: FT_000405
Version 1.2
Issue Date: 2013-03-15

The intention of this errata technical note is to give a detailed description of known functional or electricalissues with the FTDI FT232H devices.
The current revision of the FT232H is revision C, launched March 2013.

Use of FTDI devices in life support and/or safety applications is entirely at the user’s risk, and theuser agrees to defend, indemnify and hold harmless FTDI from any and all damages, claims, suits
or expense resulting from such use.
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): support1@ftdichip.com Web: http://www.ftdichip.com

Copyright © 2013 Future Technology Devices International Limited

Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
Version 1.2
Clearance No.: FTDI# 201

TABLE OF CONTENTS

1FT232H Revision .................................................................................... 22Errata History Table – Functional Issues ............................................. 32.1

3

Functional Issues of FT232H ................................................................ 4
3.1

Revision A ............................................................................................................ 4

3.1.1

Error switching from 245 FIFO mode to MPSSE mode........................................................... 4

3.1.2

Incorrect status reported on FT1248 MISO line when SS_n is inactive .................................. 4

3.2
3.2.1

3.3
3.3.1

4

Errata History Table – Electrical and Timing Specification Deviations. ......... 3

Revision B ............................................................................................................ 6
Incorrect status reported on FT1248 MISO line when SS_n is inactive .................................. 6

Revision C ............................................................................................................ 7
Incorrect status reported on FT1248 MISO line when SS_n is inactive .................................. 7

Electrical and Timing specification deviations of FT232H ................. 84.1

Revision A ............................................................................................................ 84.1.1

Suspend Timer Failure ............................................................................................................ 84.1.2

Internal 3V3 Regulator ............................................................................................................. 94.2
4.2.1

4.3

Revision B .......................................................................................................... 10Internal 3V3 Regulator ........................................................................................................... 10

Revision C .......................................................................................................... 105

FT232H Package Markings.................................................................. 11

6

Contact Information............................................................................. 12

Appendix C – Revision History ................................................................. 13

Copyright © 2013 Future Technology Devices International Limited1

Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
Version 1.2
Clearance No.: FTDI# 201

1FT232H Revision

FT232H part numbers are listed in Table 1. The letter at the end of date code on the device markings
identifies the device revision.
The current revision of the FT232H is revision C, launched March 2013. At the time of releasing thisTechnical Note there is one known minor issue with this silicon revision. A workaround is provided for thisissue
Part Number

Package

FT232HL48 Pin LQFP

FT232HQ48 Pin QFNTable 1 FT232H Part NumbersThis errata technical note covers the revisions of FT232H listed in Table 2.
RevisionNotes

AFirst device revision (not released)

B

Second device revision (Released March 2011)

CThird device revision (Released March 2013)

Table 2 FT232H Revisions

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Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
Version 1.2
Clearance No.: FTDI# 201

2

Errata History Table – Functional Issues
Functional
Problem

Short description

Errata occurs indevice revision

FT232HError switching from 245 FIFO mode to MPSSE modeA,B

FT232HFT232H

Incorrect status reported on FT1248 MISO line when SS_n isBinactive
Incorrect status reported on FT1248 MISO line when SS_n isCinactive

2.1 Errata History Table – Electrical and Timing Specification
Deviations.
Deviations

Short description

Errata occurs in device revision

The USB specification requires a
Suspend timer failure (USBmaximum time to suspend ofChapter 9 Compliance)

3.125ms. The device takes up

Ato 4ms to suspend.
Device VCC is designed toFault with internal 3V3
regulator.

operate between 3V3 and 5V
however with this errata theA,B

supply should not be set below
4.3V for correct operation.

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Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
Version 1.2
Clearance No.: FTDI# 201

3

Functional Issues of FT232H
3.1 Revision A

3.1.1 Error switching from 245 FIFO mode to MPSSE mode
Introduction:
The FT232H may switch from one of the EEPROM configurable modes to MPSSE mode during runtime bycalling the FT_SetBitMode call in the software application.
Issue:
If the device is configured to be in 245 FIFO mode (external EEPROM) and the application switches themode to MPSSE, spurious accesses to the RD# or WR lines can cause the MPSSE protocol to corrupt. This
only affects the device if 245 FIFO mode is the operational state define in the external EEPROM.
Workaround:
Assuming 245 FIFO mode was not required prior to accessing MPSSE then selecting UART mode in theexternal EEPROM would prevent the problem.
This issue is corrected at silicon revision B.
Package specific:
The effected packages are listed in Table 3.
Package

Applicable (Yes/No)

FT232HLY

FT232HQY

Table 3

3.1.2 Incorrect status reported on FT1248 MISO line when SS_n is inactive
Introduction:
The FT232H has an FT1248 mode. This mode uses a MISO line to indicate the status of the device (e.gbuffers full / empty)
Issue:The bug is minor and system will not lose data but the status while SS_n is inactive can indicate thatdata can be written or read. However when starting a command the status on the MISO line on the clock
cycle after the command is not correct.
Workaround:
Ignore the status on the MISO line on the cycle after the command and only look at the ACK status on
the data phase of the FT1248. This will correctly reflect the status which was present while SS_n wasinactive.

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Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
Version 1.2
Clearance No.: FTDI# 201

Package specific:
The effected packages are listed in Table 4.
Package

Applicable (Yes/No)

FT232HLY

FT232HQY

Table 4

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TN_130 FT232H Errata Technical NoteVersion 1.2Clearance No.: FTDI# 201

3.2 Revision B
3.2.1 Incorrect status reported on FT1248 MISO line when SS_n is inactive
Introduction:
The FT232H has an FT1248 mode. This mode uses a MISO line to indicate the status of the device (e.gbuffers full / empty)
Issue:The bug is minor and system will not lose data but the status while SS_n is inactive can indicate thatdata can be written or read. However when starting a command the status on the MISO line on the clock
cycle after the command is not correct.
Workaround:
Ignore the status on the MISO line on the cycle after the command and only look at the ACK status onthe data phase of the FT1248. This will correctly reflect the status which was present while SS_n wasinactive.

Package specific:
The effected packages are listed in Table 4.
Package

Applicable (Yes/No)

FT232HLY

FT232HQY

Table 5

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Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
Version 1.2
Clearance No.: FTDI# 201

3.3 Revision C
3.3.1 Incorrect status reported on FT1248 MISO line when SS_n is inactive
Introduction:The FT232H has an FT1248 mode. This mode uses a MISO line to indicate the status of the device (e.gbuffers full / empty)
Issue:The bug is minor and system will not lose data but the status while SS_n is inactive can indicate thatdata can be written or read. However when starting a command the status on the MISO line on the clock
cycle after the command is not correct.
Workaround:
Ignore the status on the MISO line on the cycle after the command and only look at the ACK status on
the data phase of the FT1248. This will correctly reflect the status which was present while SS_n wasinactive.

Package specific:
The effected packages are listed in Table 4.
Package

Applicable (Yes/No)

FT232HLY

FT232HQYTable 6Copyright © 2013 Future Technology Devices International Limited7

Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
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Clearance No.: FTDI# 201

4

Electrical and Timing specification deviations of FT232H
4.1 Revision A

4.1.1 Suspend Timer Failure
Introduction:
The FT232H has the ability to be put into suspend by the host to conserve power usage.
Issue: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:This issue is corrected at silicon revision B.
Package specific:
The effected packages are listed in Table 5.
Package

Applicable (Yes/No)

FT232HLY

FT232HQY

Table 7

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Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
Version 1.2
Clearance No.: FTDI# 201

4.1.2 Internal 3V3 Regulator
Introduction:
The FT232H uses an internal regulator to generate 3V3 from a 5V source (VREGIN). The source should bevariable from 3V3 to 5V.
Issue:The supply to the regulator must not drop below 4.3V for the correct 3V3 regulated output to beproduced. This only affects self-powered designs where the only board supply is 3V3.
Workaround:
VREGIN must not be supplied below 4.3V. VREGIN can be powered via the USB bus supply with VCCIO,
VPLL and VPHY powered with 3.3 volts.
Package specific:
The effected packages are listed in Table 6.
Package

Applicable (Yes/No)

FT232HLY

FT232HQYTable 8Copyright © 2013 Future Technology Devices International Limited

9Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
Version 1.2
Clearance No.: FTDI# 201

4.2 Revision B
4.2.1 Internal 3V3 Regulator
Introduction:
The FT232H uses an internal regulator to generate 3V3 from a 5V source (VREGIN). The source should bevariable from 3V3 to 5V.
Issue:The supply to the regulator must not drop below 4.3V for the correct 3V3 regulated output to be
produced. This only affects self-powered designs where the only board supply is 3V3.
Workaround:
VREGIN must not be supplied below 4.3V. VREGIN can be powered via the USB bus supply with VCCIO,VPLL and VPHY powered with 3.3 volts.
Package specific:
The effected packages are listed in Table 7.
Package

Applicable (Yes/No)

FT232HLY

FT232HQY

Table 94.3 Revision C
No known issues at revision C.

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TN_130 FT232H Errata Technical Note
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Clearance No.: FTDI# 201

5FT232H Package Markings

FT232H is available in a RoHS Compliant package, 48 pin LQFP and 48 pin QFN. An example of themarkings on the package is shown in Figure 3-1.

Line 1 – FTDI LOGOLine 2 – Date code and revisionLine 3 – FTDI Part Number

Dimensions are in mm

Figure 5-1 Package Markings – FT232HQLine 1 – FTDI LOGOLine 2 – Date code and revisionLine 3 – FTDI Part Number

Dimensions are in mm

Figure 5-2 Package Markings – FT232HL

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6Contact Information

Head Office – Glasgow, UK

Branch Office – Hillsboro, Oregon, USA

Future Technology Devices International Limited
Unit 1, 2 Seaward Place, Centurion Business Park
Glasgow G41 1HHUnited Kingdom
Tel: +44 (0) 141 429 2777
Fax: +44 (0) 141 429 2758

Future Technology Devices International Limited(USA)
7130 SW Fir Loop
Tigard, OR 97223
USA
Tel: +1 (503) 547 0988
Fax: +1 (503) 547 0987

E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

E-Mail (Sales)
E-Mail (Support)
E-Mail (General Enquiries)

sales1@ftdichip.com
support1@ftdichip.com
admin1@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 8791 3570
Fax: +886 (0) 2 8791 3576
E-mail (Sales)
E-mail (Support)
E-mail (General Enquiries)

us.sales@ftdichip.com
us.support@ftdichip.com
us.admin@ftdichip.com

Branch Office – Shanghai, China
Future Technology Devices International Limited(China)Room 1103, No.666 West Huaihai Road,
Shanghai, 200052
China
Tel: +86 21 62351596
Fax: +86 21 62351595

E-mail (Sales)
tw.sales1@ftdichip.com E-mail (Support)
tw.support1@ftdichip.comE-mail (General Enquiries)
tw.admin1@ftdichip.com

cn.sales@ftdichip.com
cn.support@ftdichip.com
cn.admin@ftdichip.com

Branch Office – Singapore
Future Technology Devices International Limited (Singapore)
178 Paya Lebar Road
#07-03/04/05
Singapore 409030
Tel: +65 6841 1174
Fax: +65 6841 6071
E-mail (Support)
E-mail (General Enquiries)

support1@ftdichip.com
admin1@ftdichip.com

Web Site
http://ftdichip.com

System and equipment manufacturers and designers are responsible to ensure that their systems, and any Future
Technology Devices International Ltd (FTDI) devices incorporated in their systems, meet all applicable safety, regulatory
and system-level performance requirements. All application-related information in this document (including application
descriptions, suggested FTDI devices and other materials) is provided for reference only. While FTDI has taken care toassure it is accurate, this information is subject to customer confirmation, and FTDI disclaims all liability for systemdesigns and for any applications assistance provided by FTDI. Use of FTDI devices in life support and/or safety
applications is entirely at the user’s risk, and the user agrees to defend, indemnify and hold harmless FTDI from any andall damages, claims, suits or expense resulting from such use. This document is subject to change without notice. No
freedom to use patents or other intellectual property rights is implied by the publication of this document. Neither thewhole nor any part of the information contained in, or the product described in this document, may be adapted or
reproduced in any material or electronic form without the prior written consent of the copyright holder. Future
Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow G41 1HH, United
Kingdom. Scotland Registered Company Number: SC136640

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Document Reference No.: FT_000405
TN_130 FT232H Errata Technical Note
Version 1.2
Clearance No.: FTDI# 201

Appendix C – Revision History
Version 1.0

First Release

16/02/2011

Version 1.1

Update to include 3V3 regulator

28/01/2013

Version 1.2

Update Device to Revision C

15/03/2013

Copyright © 2013 Future Technology Devices International Limited13