Subver= sion Repositories=20 rsencoder

I/O inputs -



Inputs :



datain (8 bits) =3D serial input where message data is fed. =

If the message polynomial of form,

         d_nX^n + d_(n-1)X^(n-1) + ......etc., then d_n =

followed by d_(n-1) in the next=20

         clock cyle, .....etc. datain should contain a new =

message byte at every clock cycle

         as long as the valid is high.



gin0.....gin15 (8 bits each ) =3D Generator polynomial =

co-effcients. The generator polynomial

                              is form =

X^16+gin15X^15+gin14X^14+ ......gin1X+gin0.



valid =3D Pull high when data becomes available. Pull low =

when all message bytes (total of 239=20

        bytes) has been entered. By pulling valid low the =

contents of the registers are freezed.

        Pull high when the next block (239 bytes) of =

message data is available.



clkin =3D input clock.



rst =3D reset signal to initialize registers (to all =

zeros).



Outputs :



q0....q15 (8 bits each) : Parity bytes in the polynomial =

form,=20

                         q15X^15+q14X^14+ ......q0. Latch =

externally if required. Valid as long

                         as valid signal is low.



=20