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AR# 21816

Virtex-II Pro-X RocketIO- Where is the second bit of RXCPI?

Description

General Description:  

In the RocketIO-X Transceiver User Guide (UG035 v1.5) the memory map on p. 148, Table C-2 shows RXCPI to be a single bit in the register at address 0x0A. However, on p.158 RXCPI is described as being a 2 bit number. 

http://www.xilinx.com/xlnx/xweb/xil_publications_display.jsp?sGlobalNavPick=&sSecondaryNavPick=&category=-1210770&iLanguageID=1
 

Where is the second bit of RXCPI?

Solution

Following is the mapping of RXCPI[1:0] to Table C-2 

 

RXCPI<1> = RXCPGAIN (Bit7 of Reg 0xB in table C-2) 

RXCPI<0> = RXCPI (Bit1 of Reg 0xA in table C-2).

AR# 21816
Date Created 09/04/2007
Last Updated 05/19/2014
Status Archive
Type General Article