(c) 2013 . renesas electronics corporation. all rights reserved. page 1 of 2 date: jan . 31 , 201 4 renesas technical update 1753 , shimonumabe, nakahara - ku, kawasaki - shi, kanagawa 211 - 8668 japan renesas electronics corp oration product cat egory mpu/mcu document no. tn - 770 - a146 a/e rev. 1.00 title the error correction and n otes about receive processing of multi - buffer frame of gigabit ethernet controller information category technical notification applicable product sh7763 group lot no. reference document sh7763 user smanual: hardware ( r01uh0349ej0300 ) all we would like to inform you of t he error correction and notes about receive processing of multi - buffer frame of gigabit ethernet contr oller . 1 . description of the rmsa0 bit is correct ed page 8 58 of 1982 description of the rmsa0 bit in the receive/relay function set register (port 0) (tsu_fwsl0) is correct ed as follows. [error] sets the processing method when the sa (sourceaddress) of a frame rece ived from port 0 is not registered in the entry table . 0: frame is not received 1: frame is received [correction] sets th e processing method of a frame received from port 0 . 0: frame is received according to setup of the cam function. 1: frame is received regardless of setup of the cam function. 2 . description of the rmsa 1 bi t is corrected page 8 60 of 1982 description of the rmsa 1 bit in the receive/relay function set register (port 1 ) (tsu_fwsl 1 ) is corrected as follows. [error] sets the processing method when the sa (sourceaddress) of a frame received from port 1 is not registered in the entry table . 0: frame is not received 1: frame is received [correction] sets th e processing method of a frame received from port 1 . 0: frame is received according to setup of the cam function. 1: frame is received regardless of setup o f the cam function.
renesas technical update tn - 770 -a146a/e date : january 31 , 201 4 page 2 o f 2 3 . n otes about receive processing of multi - b uffer frame (s in gle -f rame/ m ulti -d es criptor) . [notice] when t he receive descriptor is newly added after the receive descriptor empty and dma transfer of a receiving frame is resumed, it becomes impossible to perform dma transfer normally in receive processing of multi - buffer frame (single - frame/multi - descriptor). please perform the following workaround or use all receive data of o ne frame in a one receive buffer(s ingle -f rame/ s i ngle - d escriptor ) in receive processing. [occu rring conditions] when t he receive descriptor is empty in receive processing of multi - buffer frame ( s ingle -f rame/ m ulti -d escriptor) . [worka round] when using receive processing of multi - buffer frame (s ingle -f rame/ m ulti -d escriptor) , please perform as either of following. (1) don t empty the receive descriptor. (2) when the receive descriptor is empty, execute a software reset by means of the swrt and swrr bits in the e- dmac mode register (edmr) .
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