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| DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA PM7381 FREEDM-32A672 REVISION C DEVICE ERRATA ISSUE 3 December, 2001 PMC-Sierra, Inc. 105 - 8555 Baxter Place, Burnaby, BC Canada V5A 4V7 604 415 6000 DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA TABLE OF CONTENTS 1. Introduction ..........................................................................................................1 1.1. Device Identification ..................................................................................1 1.2. Reference..................................................................................................1 FREEDM-32A672 Revision C Functional Deficiency List ....................................2 2.1. Following recovery from receive FIFO overrun events, truncated data transfers may occur on the receive Any-PHY bus. ..............................................3 Documentation Errors ..........................................................................................5 3.1. PROV and DELIN bits in Register 0x204 are Write-Only..........................6 3.2. 7BIT, INVERT, CRC[1], and CRC[0] bits in Register 0x208 are Write-Only 7 Contacting PMC-Sierra ........................................................................................8 2. 3. 4. PMC-SIERRA, INC. i DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA 1. Introduction In this document, Section 2 lists the known functional errata for revision C of PM7381 FREEDM-32A672 and Section 3 lists errors found in Issue 6 of the FREEDM-32A672 datasheet (PMC-1990263). 1.1. Device Identification The information contained in Section 2 relates to Revision C of PM7381 FREEDM32A672 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). PM7381 FREEDM-32A672 Revision C is packaged in a 329-pin Plastic Ball Grid Array (PBGA). Figure 1.1: PM7381 FREEDM-32A672 Branding Format. Pin A1 Reference PMC Logo FREEDM Logo FREEDM 32A672 PM7381-PI C C Myyww PHILIPPINES TM Part Number Wafer Batch Code Assembly Date Code Country of Origin Not to Scale 1.2. * Reference PMC-1990263, FREEDM-32A672 Long Form Data Sheet, Issue 6. PMC-SIERRA, INC. 1 DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA 2. FREEDM-32A672 Revision C Functional Deficiency List This section lists the known functional deficiencies for Revision C of FREEDM32A672 (as of the publication date of this document). For each deficiency, the known work-around and the operating constraints, with and without the work-around, are also described. Please report any functional deficiencies not covered in this document to PMC-Sierra. PMC-SIERRA, INC. 2 DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA 2.1. Following recovery from receive FIFO overrun events, truncated data transfers may occur on the receive Any-PHY bus. Description: When outputting packets on the receive Any-PHY bus, the FREEDM-32A672 will normally transfer bursts of data containing ((XFER+1)*16) bytes, where XFER is a value between 0 and 15 configurable on a per-channel basis, or alternatively, bursts of data containing fewer bytes but including an end of packet. The Any-PHY interface is intended to operate in such a manner at all times, so that a downstream device may assume that any data transfer, in which REOP is not asserted is of a fixed length. Following a receive FIFO overrun, however, the FREEDM-32A672 implements an automatic FIFO healing mechanism. As a consequence of this mechanism, the FREEDM-32A672 may output a burst of data containing (n*16) bytes of data, where n is less than (XFER+1), but which does not include an end of packet. Workarounds: There are 4 possible independent workarounds: i) Set the receive path XFER to 0. All transfers not containing an end of packet will then be 16 bytes and thus of constant length. This workaround may not be suitable in high bandwidth systems, especially if multple FREEDM-32A672s are sharing an Any-PHY bus. Attach a pull-down resistor to the RVAL output and monitor this signal to detect truncated data transfers. Attach a pull-up resistor to the RERR output and monitor this signal to detect truncated data transfers. RERR is always logic 0 when the FREEDM-32A672 is outputting data on the Any-PHY bus, except when REOP is asserted. If a pull-up resistor is attached to RERR, a truncated transfer will be indicated by RERR = 1 and REOP = 0. The downstream device can the take appropriate action such as discarding the packet. Attach pull-down or pull-up resistors to the RXDATA[15:0] outputs and a pulldown resistor to the RXPRTY output. If the FREEDM-32A672 outputs a truncated burst of data and the downstream device is not monitoring RVAL and is expecting a fixed length burst of data, the downstream device will observe parity errors and can take appropriate action such as discarding the packet. 3 ii) iii) iv) PMC-SIERRA, INC. DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA Performance with workaround: FREEDM-32A672 operates correctly. Performance without workaround: The downstream device may sample invalid packet data. PMC-SIERRA, INC. 4 DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA 3. Documentation Errors This section lists the known documentation errors in Issue 6 of PMC-1990263 FREEDM-32A672 Datasheet (as of the publication date of this document). Please report any documentation errors not covered in this document to PMC-Sierra. PMC-SIERRA, INC. 5 DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA 3.1. PROV and DELIN bits in Register 0x204 are Write-Only PROV and DELIN bits in Register 0x204 are write-only and not read/write. Changes to the register table are shown below. Register 0x204 : RHDL Indirect Channel Data Register #1 Bit Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Type R/W W R/W R/W W R W W W W W W W W W W W W Function PROV STRIP DELIN TAVAIL Reserved FPTR[10] FPTR[9] FPTR[8] FPTR[7] FPTR[6] FPTR[5] FPTR[4] FPTR[3] FPTR[2] FPTR[1] FPTR[0] Default 0 0 0 X X X X X X X X X X X X X PMC-SIERRA, INC. 6 DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA 3.2. 7BIT, INVERT, CRC[1], and CRC[0] bits in Register 0x208 are Write-Only 7BIT, INVERT, CRC[1], and CRC[0] bits in Register 0x208 are write-only and not read/write. Changes to the register table are shown below. Register 0x208 : RHDL Indirect Channel Data Register #2 Bit Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 R/W R/W R/W R/W R/W W R/W W R/W R/W Type R/W W R/W R/W W Function 7BIT PRIORITY INVERT Unused CRC[1] CRC[0] OFFSET[1] OFFSET[0] Unused Unused Unused Unused XFER[3] XFER[2] XFER[1] XFER[0] Default 0 0 0 X 0 0 0 0 X X X X 0 0 0 0 PMC-SIERRA, INC. 7 DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA 4. Contacting PMC-Sierra PMC-Sierra, Inc. 105 - 8555 Baxter Place Burnaby, BC V5A 4V7 Tel: (604) 415-6000 Fax: (604) 415-6200 Product information: Applications information: Internet: info@pmc-sierra.bc.ca apps@pmc-sierra.bc.ca http://www.pmc-sierra.com PMC-SIERRA, INC. 8 DATASHEET ERRATA PM7381 FREEDM-32A672 PMC-2000952 ISSUE 3 FREEDM-32A672 REVISION C DEVICE ERRATA NOTES Seller will have no obligation or liability in respect of defects or damage caused by unauthorized use, mis-use, accident, external cause, installation error, or normal wear and tear. There are no warranties, representations or guarantees of any kind, either express or implied by law or custom, regarding the product or its performance, including those regarding quality, merchantability, fitness for purpose, condition, design, title, infringement of thirdparty rights, or conformance with sample. Seller shall not be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon, the information contained in this document. In no event will Seller be liable to Buyer or to any other party for loss of profits, loss of savings, or punitive, exemplary, incidental, consequential or special damages, even if Seller has knowledge of the possibility of such potential loss or damage and even if caused by Seller's negligence. (c) 2001 PMC-Sierra, Inc. Issue date: December, 2001 PMC-Sierra, Inc. 105 - 8555 Baxter Place Burnaby, BC Canada V5A 4V7 604 415 6000 |
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