Altera Reed-Solomon II MegaCore Function Uživatelský manuál stáhnout pdf (Strana 25)

Name Avalon-ST Type Direction Description

in_error error Input Error signal. Specifies if the input data symbol is an

error and whether the decoder can consider it as an

erasure. Erasures-supporting decoders only.

out_

startof-

packet

sop Output Start of packet (codeword) signal. This signal

indicates the codeword boundaries on the in_

data[] bus. When the IP core drives this signal

high, it indicates that the start of packet is present

on the in_data[] bus. The IP core asserts this

signal on the first transfer of every codeword.

out_

endofpacket

eop Output End of packet (codeword) signal. This signal

indicates the packet boundaries on the in_data[]

bus. When the IP core drives this signal high, it

indicates that the end of packet is present on the

in_data[] bus. The IP core asserts this signal on

the last transfer of every packet.

out_ready ready Input Data transfer ready signal to indicate that the

downstream module is ready to accept data. The

source provides new data (if available) when you

assert the out_ready signal and stops providing

new data when you deassert the out_ready signal.

If the source is unable to provide new data, it

deasserts out_valid for one or more clock cycles

until it is prepared to drive valid data interface

signals.

out_valid valid Output Data valid signal. The IP core asserts the out_valid

signal high, whenever a valid output is on out_

data ; the IP core deasserts the signal when there is

no valid output on out_data .

out_data data Output Contains decoded output when the IP core asserts

the out_valid signal. The corrected symbols are in

the same order that they are entered.

out_channel channel Output Specifies the channel whose result is presented at

out_data . Available only when you configure the

IP core to support multiple channels.

out_error error Output Indicates non-correctable codeword (decoder only).

Valid when the IP core asserts out_endofpacket .

Table 3-5: Status Interface Signals

Name Avalon-ST Type Direction Description

status_error_value conduit Output Error correction value for every

valid data symbol.

UG-01090

2015.05.01

Reed-Solomon II IP Core Signals

3-9

Reed-Solomon II IP Core Functional Description

Altera Corporation

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