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RELEASED DEVICE ERRATA PMC-990884 ISSUE 4
PM7351 S/UNI-VORTEX
OCTAL SERIAL LINK MULTIPLEXER
PM7351
VORTEX
S/UNI -
TM
S/UNI-VORTEX
OCTAL SERIAL LINK MULTIPLEXER
DEVICE ERRATA
RELEASED ISSUE 4: JUNE 2000
PMC-Sierra, Inc.
105 - 8555 Baxter Place Burnaby, BC Canada V5A 4V7 604 .415.6000
RELEASED DEVICE ERRATA PMC-990884 ISSUE 4
PM7351 S/UNI-VORTEX
OCTAL SERIAL LINK MULTIPLEXER
REVISION HISTORY
Issue No. Issue 4
Issue Date June, 2000
ECN 2594
Details of Change Updated errata for production release. Updated functional discrepancies. Removed items pertaining to prototype devices or preliminary data sheet only.
Issue 3
January, 2000
N/A
Added revised text for LVDS signal amplitude. Added revised text for CELLXFERRI interrupt description. Removed Revision A functional discrepancies resolved in Rev B.
Issue 2
December, 1999
N/A
Updated receive timing reference jitter specification. Listed Revision B fixes to Revision A functional discrepancies.
Issue 1
July ,1999
N/A
PMC-Sierra, Inc.
105 - 8555 Baxter Place Burnaby, BC Canada V5A 4V7 604 .415.6000
RELEASED DEVICE ERRATA PMC-990884 ISSUE 4
PM7351 S/UNI-VORTEX
OCTAL SERIAL LINK MULTIPLEXER
CONTENTS 1 2 INTRODUCTION...........................................................................................1 FUNCTIONAL DEFICIENCIES .....................................................................2 2.1 ANOMALOUS TPA BEHAVIOR FOLLOWING BUS VIOLATION ........2
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE
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RELEASED DEVICE ERRATA PMC-990884 ISSUE 4
PM7351 S/UNI-VORTEX
OCTAL SERIAL LINK MULTIPLEXER
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PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE
1
RELEASED DEVICE ERRATA PMC-990884 ISSUE 4
PM7351 S/UNI-VORTEX
OCTAL SERIAL LINK MULTIPLEXER
1
INTRODUCTION The information contained in this document applies to Revision B of PM7351 S/UNI-VORTEX only. The device revision code is marked at the end of the Wafer Batch Code on the face of the device (as shown in Figure 1). Figure 1 - Device Marking
Pin A1 Reference Mark
S/UNI -
TM
PMC Logo
VORTEX
PM 7351-BI C________B M yyw w
Part Num ber W afer Batch Code Assem bly Date Code
SCALE = 2:1 (Approx.)
The information contained in this document applies to Issue 5 of the PM7351 S/UNI-VORTEX Data Sheet only. Reference: PMC-980582, PM7351 S/UNI-VORTEX Octal Serial Link Multiplexer Data Sheet, Issue 5, March, 2000.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE
1
RELEASED DEVICE ERRATA PMC-990884 ISSUE 4
PM7351 S/UNI-VORTEX
OCTAL SERIAL LINK MULTIPLEXER
2
FUNCTIONAL DEFICIENCIES This section lists the known functional deficiencies of the S/UNI-VORTEX device as of the publication date of this document. For each deficiency, the known work-around and operating constraints, if any, are described. Please report any functional deficiencies observed to PMC-Sierra at: PMC-Sierra, Inc. 105-8555 Baxter Place Burnaby, BC Canada V5A 4V7 Tel: (604) 415-6000 App Support: (604) 415-4533 Fax: (604) 415-6001 Product information: Applications information: Web Site: info@pmc-sierra.com apps@pmc-sierra.com http://www.pmc-sierra.com
2.1
Anomalous TPA Behavior Following Bus Violation Document References S/UNI-VORTEX Octal Serial Link Multiplexer Data Sheet, Sections 9, 12, and 13. Description In very limited circumstances, the S/UNI-VORTEX may enter a state where the device will not assert the TPA output signal correctly. The symptom of this problem is that once a cell has been transferred downstream to a given logical channel, the TPA output for that channel will not be asserted until the TSX input is asserted (i.e. a new cell is transferred to any other logical channel on the entire bus). This can prevent the sequential transfer of cells to a single logical channel on the affected device. When using the S/UNI-APEX, any sequential cells that cannot be sent to a single channel will be sent during the next available opportunity following a cell transfer to another logical channel. This behavior will persist until the device is reset. The S/UNI-VORTEX will enter this state only if the downstream bus protocol has been violated as indicated by the CELLXFERRI bit of the Downstream Cell Interface Interrupt Status register.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE
2
RELEASED DEVICE ERRATA PMC-990884 ISSUE 4
PM7351 S/UNI-VORTEX
OCTAL SERIAL LINK MULTIPLEXER
Resolution Bus violations should never occur in normal operation except in cases of severe electrical interference. It is important to ensure that the hardware design and software programming do not inadvertently induce bus violations. Properly observing power-up and initialization sequences and using the appropriate PMCSierra device drivers will prevent any potential problems. If a device other than the S/UNI-APEX is being used as bus master, the following measures should be observed to help prevent bus violations: * The bus master should not attempt to write a cell to the S/UNI-VORTEX before the device is properly initialized. This can induce a bus violation when the bus master attempts to write a cell longer or shorter than expected by the S/UNI-VORTEX (If not explicitly set, this default is 56 bytes). The device should be properly initialized as described in S/UNI-VORTEX Octal Serial Link Multiplexer Data Sheet, Section 12. The bus master should not hold the TSX signal high while the S/UNIVORTEX is in reset. For non-S/UNI-APEX devices, it may be necessary to use a pull-down resistor on this signal line to prevent a violation from occurring during initialization. The bus master should not violate the bus protocol during operation. Any attempts to transfer a cell that is longer or shorter than expected by the S/UNI-VORTEX or otherwise violate the bus protocol will set the CELLXFERRI bit of the Downstream Cell Interface Interrupt Status register which will reliably indicate that a violation has occurred.
*
*
Bus violations caused by severe electrical interference could also cause the CELLXFERRI bit to be set. Because the S/UNI-VORTEX will still continue to transfer cells even after a bus violation, a software reset of the device can be deferred indefinitely. If the S/UNI-VORTEX enters this anomalous state, the only case where cell transfers could halt completely is when there is one, and only one, active downstream channel on any device on the entire loop bus. In this case, cells for this channel will queue indefinitely until a TSX signal is asserted on the bus. Again, the bus violation can be reliably detected via the CELLXFERRI bit and a software reset performed to clear the problem.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE
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RELEASED DEVICE ERRATA PMC-990884 ISSUE 4
PM7351 S/UNI-VORTEX
OCTAL SERIAL LINK MULTIPLEXER
CONTACTING PMC-SIERRA, INC. PMC-Sierra, Inc. 105-8555 Baxter Place Burnaby, BC Canada V5A 4V7 Tel: Fax: (604) 415-6000 (604) 415-6200 document@pmc-sierra.com info@pmc-sierra.com apps@pmc-sierra.com http://www.pmc-sierra.com
Document Information: Corporate Information: Application Information: Web Site:
None of the information contained in this document constitutes an express or implied warranty by PMC-Sierra, Inc. as to the sufficiency, fitness or suitability for a particular purpose of any such information or the fitness, or suitability for a particular purpose, merchantability, performance, compatibility with other parts or systems, of any of the products of PMC-Sierra, Inc., or any portion thereof, referred to in this document. PMC-Sierra, Inc. expressly disclaims all representations and warranties of any kind regarding the contents or use of the information, including, but not limited to, express and implied warranties of accuracy, completeness, merchantability, fitness for a particular use, or non-infringement. In no event will PMC-Sierra, Inc. be liable for any direct, indirect, special, incidental or consequential damages, including, but not limited to, lost profits, lost business or lost data resulting from any use of or reliance upon the information, whether or not PMC-Sierra, Inc. has been advised of the possibility of such damage. (c) 2000 PMC-Sierra, Inc. PMC-990884 (R4) ref PMC-980582 (R5) Issue date: June 2000
PROPRIETARY AND CONFIDENTIAL TO PMC-Sierra, Inc.
105 - 8555 Baxter Place Burnaby, BC Canada V5A 4V7 604 .415.6000

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