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AR# 37182

Virtex-6 FPGA GTH Transceiver: Clarification on ES Errata item regarding T_BLOCK_TYPE

Description

This answer record discusses how exactly the T_BLOCK_TYPE errata itemfor GTH Transceiver in Virtex-6 FPGA ES erratawill be exhibited.

Solution


Clause 49.2.13.2.3 states that

T_BLOCK_TYPE will = C when:
a)..
b)'one valid ordered set and four valid control characters other than /O/, /S/ and /T/'
c)

Our silicon rev 2.0 behaves slightly differently:

T_BLOCK_TYPE will = C when:
a)
b)'one valid ordered set and four valid control characters other than /E/, /O/, /S/ and /T/'
c)..

The errata only mentions an example pattern that can be mis-classified.

DATACONTROL
TXD2 (71:40)TXD1 (39:8)TXC2(7:4)TXC1(3:0)
0707FE070707075CF1
/I/I/E/IDDD/Fsig(?)

In this example, bits 39:8 form a valid ordered set and bits 71:40 comprise of 4 control characters other than /O/,/S/,/T/ (satisfies the requirement for C type). However, this pattern is incorrectly encoded as "E" instead of "C".

Linked Answer Records

Associated Answer Records

Answer Number Answer Title Version Found Version Resolved
38596 Virtex-6 FPGA GTH Transceiver - Known Issues and Answer Records List N/A N/A
AR# 37182
Date Created 03/11/2011
Last Updated 12/15/2012
Status Active
Type General Article
Devices
  • Virtex-6 HXT