Altera Reed-Solomon II MegaCore Function Instrukcja Użytkownika Pobierz pdf (Strona 21)

Figure 3-6: Encoder Timing—Two Channels

For a two-channel codeword, the encoder asserts the in_startofpacket and in_endofpacket signals for

two consecutive cycles.

clk_clk

reset_reset_n

in_valid

in_startofpacket

in_endofpacket

in_data[7:0]

in_channel

in_ready

out_valid

out_startofpacket

out_endofpacket

out_data[7:0]

out_channel

out_ready

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 217218 219 220 221 222 223 224 225 226 227 228 229 230 231 232

0 1 2 3 4 5 6 7 8 9 10 11 12 13 215 216 217218 219 220 221 222 163 211 153 119 68 157 153 239 209 70 223 224 225 226 227 228 229 230

223

Figure 3-7: Decoder Timing—Two Channels

For a two-channel codeword, the decoder asserts the in_startofpacket and in_endofpacket signals for

two consecutive cycles.

clk_clk

reset_reset_n

in_valid

in_startofpacket

in_endofpacket

in_data[7:0]

in_channel

in_ready

out_valid

out_startofpacket

out_endofpacket

out_data[7:0]

out_channel

out_ready

out_error

1 2 3 4 5 6 19 124 84 44 237174 55 192193194195 196197198 153154 155156 157158 159160161162 163 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101

0 X 1 2 3 4 5 6 19 124 84 44 237 174 55 192193194195 196 197198 1992001

status_error_value[7:0]

0 0

status_num_error_symbol[3:0]

0 0 8 90

status_num_error_bit[6:0]

0 0 0

Reed-Solomon II IP Core Parameters

Table 3-2: Parameters

Parameter Legal Values Default Value Description

Reed-Solomon Encoder or Decoder Encoder Specifies an encoder or a decoder.

Number of

channels

1 to 16 1 Specifies the number of input channels (C)

to process. The channel pattern is fixed.

UG-01090

2015.05.01

Reed-Solomon II IP Core Parameters

3-5

Reed-Solomon II IP Core Functional Description

Altera Corporation

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