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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
PM7367
FREEDM-32P32
REVISION A DEVICE ERRATA
ISSUE 2: NOVEMBER 2001
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE
FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
PUBLIC REVISION HISTORY Issue No. 1 2 Issue Date November 2001 Details of Change
June 2000 Document Created Revised to refer to Issue 2 datasheet
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS' INTERNAL USE
FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
CONTENTS 1 INTRODUCTION ......................................................................................1 1.1 1.2 2 DEVICE IDENTIFICATION ............................................................1 REFERENCE .................................................................................1
FREEDM-32P32 REVISION A FUNCTIONAL DEFICIENCY LIST ...........2 2.1 OFFSET UNDERFLOW IN RECEIVE PACKET DESCRIPTOR ....3 2.1.1 DESCRIPTION:...................................................................3 2.1.2 WORKAROUNDS: ..............................................................3 2.1.3 PERFORMANCE WITH WORKAROUND: .........................4 2.1.4 PERFORMANCE WITHOUT WORKAROUND: ..................4 2.2 TDR STATUS BITS NOT REPORTING ALL UNDERFLOW EVENTS.........................................................................................5 2.2.1 DESCRIPTION:...................................................................5 2.2.2 WORKAROUNDS: ..............................................................5 2.2.3 PERFORMANCE WITH WORKAROUND: .........................5 2.2.4 PERFORMANCE WITHOUT WORKAROUND: ..................5 2.3 PCI HOLD TIME INCREASED TO 1NS .........................................6 2.3.1 DESCRIPTION:...................................................................6 2.3.2 WORKAROUNDS: ..............................................................6 2.3.3 PERFORMANCE WITH WORKAROUND: .........................6 2.3.4 PERFORMANCE WITHOUT WORKAROUND: ..................6
3
DOCUMENTATION ERRORS ..................................................................7
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
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INTRODUCTION In this document, Section 2 lists the known functional errata for revision A of PM7367 FREEDM-32P32 and Section 3 lists the errors found in Issue 2 of the PM7367 FREEDM-32P32 Long Form Data Sheet (PMC-1991499).
1.1
Device Identification The information contained in the Errata relates to Revision A of PM7367 FREEDM-32P32 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 1.1). PM7367 FREEDM-32P32 Revision A is packaged in a 272-pin Plastic Ball Grid Array (PBGA).
Figure 1 - PM7367 FREEDM-32P32 Branding Format.
Ball A1 Index Marks
PMC Logo
FREEDM
32P32
PM7367-PI C_______A Myyww PHILIPPINES
TM
Part Number Wafer Batch Code Assembly Date Code Country of Origin
1.2 *
Reference PMC-1991499, FREEDM-32P32 Long Form Data Sheet, Issue 2
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
2
FREEDM-32P32 REVISION A FUNCTIONAL DEFICIENCY LIST This section lists the known functional deficiencies for Revision A of FREEDM32P32 (as of the publication date of this document). For each deficiency, the known work-around and the operating constraints, with and without the workaround, are also described. Please report any functional deficiencies not covered in this document to PMC-Sierra.
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
2.1
Offset underflow in Receive Packet Descriptor
2.1.1 Description: When ALL of the following conditions are met: 1. The offset[1:0] field of a Receive Packet Descriptor (RPD) is non-zero. 2. The STRIP bit of register "0x204 RHDL Indirect Channel Data Register #1" is logic one. 3. The incoming packet payload is smaller than the FCS field (2 bytes for CRCCCITT or 4 bytes for CRC-32). The value in the "Bytes in Buffer [15:0]" field of the RPD can be underflowed. That is, this field will contain a negative value. If this field is interpreted as an unsigned integer, the content of the buffer can be erroneously interpreted as a very large number. 2.1.1.1 Figure 2.1: Receive Packet Descriptor.
Bit 31
Data Buffer Start Address [31:0] Bytes In Buffer [15:0] Reserved (18) Reserved (16) Status [5:0] Offset[1:0] CE RCC [6:0]
0
Next RPD Pointer [13:0] Receive Buffer Size [15:0]
2.1.2 Workarounds: The following are independent workarounds for this error: 1. If the Offset[1:0] bits of RPD are set to zero, this problem will not occur. 2. If the STRIP field of "0x204 RHDL Indirect Channel Data Register #1" is set to zero, this problem will not occur. 3. If the buffer size is not larger than 32K Bytes, the most significant bit of the "Byte in Buffer" field can be used as a sign bit. The device software should discard RPDs that contain a negative "Bytes in Buffer" value. For every RPD, the driver software can compare the "Bytes in Buffer[15:0]" field to ensure that it is smaller than or equal to "Receive Buffer Size[15:0]".
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
2.1.3 Performance with workaround: FREEDM-32P32 works correctly. 2.1.4 Performance without workaround: If the "Bytes in Buffer" field is interpreted as a very large number, the driver software may attempt to read data from outside of the allocated buffer space.
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
2.2
TDR Status Bits Not Reporting All Underflow Events.
2.2.1 Description: The underflow status bit (Status[2]) of Transmit Descriptor Reference (TDR) indicates whether or not an underflow condition is detected on the transmit packet1. In FREEDM-32P32 Rev A, the underflow status bit does NOT report ALL underflow events. That is, in some cases where underflow did occur, the underflow status bit would incorrectly return a value of zero ("0") to indicate that no underflow event was detected. On the other hand, when underflow did not occur this bit operates normally. The total underflow count across all channels (register 0x508 PMON Transmit FIFO Underflow Count) is not affected by this and provides an accurate count. 2.2.2 Workarounds: There is no workaround to this problem. 2.2.3 Performance with workaround: Not applicable. 2.2.4 Performance without workaround: The system will not be able to keep an accurate underflow count on a per HDLC channel basis.
1 For additional information on the operation of Status[2] in a TDR, please refer to Fig. 9.14, Transmit Descriptor Reference of PMC-991499 FREEDM-32P32 Datasheet.
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
2.3
PCI Hold Time Increased to 1ns
2.3.1 Description: PCI Input and Bi-directional signals require a minimum hold time (tHPCI) of 1 ns with respect to PCICLK. 2.3.1.1 Figure 2.2: PCI Interface Timing
PCICLK tS PCI INPUT tP PCI OUTPUT tZ PCI TRISTATE OUTPUT tZN PCI TRISTATE OUTPUT tH
PCI
PCI
PCI
PCI
Data Valid
PCI
Data Valid
2.3.2 Workarounds: The PCI 2.1 specification requires PCI outputs to have a minimum 2 ns propagation delay. The clock skew between FREEDM-32P32 and other PCI devices in a system must therefore be kept below 1 ns to ensure correct operation. 2.3.3 Performance with workaround: Operates normally. 2.3.4 Performance without workaround: If the clock skew is not kept within the above limit, FREEDM-32P32 may operate incorrectly.
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
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DOCUMENTATION ERRORS There are no known documentation errors in Issue 2 of PMC-1991499 FREEDM32P32 Datasheet (as of the publication date of this document). Please report any documentation errors not covered in this document to PMC-Sierra.
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
NOTES
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FREEDM-32P32 ERRATA PMC-2000681 ISSUE 2
PM7367 FREEDM-32P32
FREEDM-32P32 REVISION A DEVICE ERRATA
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 (604) 415-4533 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) 2001 PMC-Sierra, Inc. PMC-2000681 (R2) ref PMC-1991499 (R2) Issue date: November 2001
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