Cypress Semiconductor CY8CTMG200 Manuale

November 7, 2008

Errata Document for TrueTouch® CY8CTMG200, CY8CTST200

CY8CTMG200, CY8CTST200

Cypress Semiconductor Corporation •198 Champion Court •San Jose, CA 95134 •408.943.2600

November 7, 2008 Document No. 001-49988 Rev. ** 1

This document describes the errata for the TrueTouch®CY8CTMG200 and CY8CTST200. Details include errata

trigger conditions, scope of impact, available workarounds, and silicon revision applicability. Compare this document

to the device’s data sheet for a complete functional description.

Contact your local Cypress Sales Representative if you have questions.

CY8CTMG200 and CY8CTST200 Errata Summary

The following Errata items apply to the CY8CTMG200 and CY8CTST200 datasheets 001-47603 and 001-47602.

1. Latch-up susceptibility when maximum I/O sink current exceeded

nPROBLEM DEFINITION

P1[3], P1[6], and P1[7] pins are susceptible to latch-up when the I/O sink current exceeds 25 mA per pin on

these pins.

nPARAMETERS AFFECTED

LU – Latch-up Current. Per JESD78A, the maximum allowable latch-up current per pin is 100 mA. Cypress

internal specification is 200 mA latch-up current limit.

nTRIGGER CONDITION(S)

Latch-up occurs when both of the following two conditions are met:

A. The offending I/O is externally connected to a voltage higher than the I/O high state, causing a current to

flow into the pin that exceeds 25 mA

B. A Port1 I/O adjacent (P1[1], P1[4] and P1[5] respectively) to the offending I/O is connected to a voltage

lower than the I/O low state, causing a signal that drops below Vss (signal undershoot), causing a current

greater than 200 mA to flow out of the pin

nSCOPE OF IMPACT

The trigger conditions outlined above exceed the maximum ratings specified in the CY8CTMG200 and

CY8CTST200 datasheets 001-47603 and 001-47602.

nWORKAROUND

Add a series resistor >300Ωto P1[3], P1[6], and P1[7] pins to restrict current to within latch-up limits.

nFIX STATUS

This issue will be corrected in the next new silicon revision.

The following Errata item applies only to the CY8CTMG200-48LTXI, CY8CTST200-48LTXI, and CY8CTMG200-

00LTXI, parts on the 001-47603 and 001-47602 Datasheets.

2. Does not meet USB 2.0 specification for D+ and D- rise/fall matching when supply voltage is under 3.3V

nPROBLEM DEFINITION

Rising to falling rate matching of the USB D+ and D- lines has a corner case at lower supply voltages, such

as those under 3.3V.

nPARAMETERS AFFECTED

Rising to falling rate matching of the USB data lines.

nTRIGGER CONDITION(S)

Operating the VCC supply voltage at the low end of the chip’s specification (under 3.3V) may cause a

missmatch in the rising to falling rate.

[+] Feedback

CY8CTMG200, CY8CTST200

Errata Document

November 7, 2008 Document No. 001-49988 Rev. ** 2

nSCOPE OF IMPACT

This condition does not affect USB communications but could cause corner case issues with USB lines’

rise/fall matching specification. Signal integrity tests were run using the Cypress development kit for the part

and excellent eye was observed with supply voltage of 3.15V.

Figure 1. Eye Diagram

nWORKAROUND

Avoid the trigger condition by using lower tolerance voltage regulators.

nFIX STATUS

This issue will be corrected in the next new silicon revision.

[+] Feedback

CY8CTMG200, CY8CTST200

Errata Document

November 7, 2008 Document No. 001-49988 Rev. ** 3

Cypress Semiconductor

198 Champion Court

San Jose, CA 95134-1709

Phone: 408-943-2600

Fax: 408-943-4730

http://www.cypress.com

no responsibility for the use of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights.

Cypress products are not warranted nor intended to be used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express

written agreement with Cypress. Furthermore, Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or

failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress products in life-support systems application implies that the

manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

AnySourceCode(softwareand/orfirmware)isownedbyCypressSemiconductorCorporation(Cypress)andisprotectedbyandsubjecttoworldwidepatentprotection

(United States and foreign), United States copyright laws and international treaty provisions. Cypress hereby grants to licensee a personal, non-exclusive, non-

transferable license to copy, use, modify, create derivative works of, and compile the Cypress Source Code and derivative works for the sole purpose of creating

customsoftwareandorfirmwarein supportoflicenseeproducttobeusedonlyin conjunctionwithaCypress integratedcircuitasspecifiedintheapplicableagreement.

Any reproduction, modification, translation, compilation, or representation of this Source Code except as specified above is prohibited without the express written

permission of Cypress.

Disclaimer: CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS MATERIAL, INCLUDING, BUT NOT LIMITED

TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cypress reserves the right to make changes without

further notice to the materials described herein. Cypress does not assume any liability arising out of the application or use of any product or circuit described herein.

Cypress does not authorize its products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result

in significant injury to the user. The inclusion of Cypress’ product in a life-support systems application implies that the manufacturer assumes all risk of such use and

in doing so indemnifies Cypress against all charges.

Use may be limited by and subject to the applicable Cypress software license agreement.

Document History Page

Document Title: Errata Document for: TrueTouch®CY8CTMG200, CY8CTST200

Document Number: 001-49988

REV. ECN NO. Issue Date Orig. of

Change Description of Change

** 2603495 See ECN DTB First release.

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