Altera Reed-Solomon II MegaCore Function Manual do Utilizador descarregar pdf (Página 24)

Table 3-3: Clock and Reset Signals

Name Avalon-ST Type Direction Description

clk_clk clk Input The main system clock. The whole IP core operates

on the rising edge of clk_clk .

reset_

reset_n

reset_n Input An active low signal that resets the entire system

when asserted. You can assert this signal asynchro‐

nously. However, you must deassert it synchronous

to the clk_clk signal. When the IP core recovers

from reset, ensure that the data it receives is a

complete packet.

Table 3-4: Avalon-ST Input and Output Interface Signals

Name Avalon-ST Type Direction Description

in_ready ready Output Data transfer ready signal to indicate that the sink is

ready to accept data. The sink interface drives the

in_ready signal to control the flow of data across

the interface. The sink interface captures the data

interface signals on the current clk rising edge.

in_valid valid Input Data valid signal to indicate the validity of the data

signals. When you assert the in_valid signal, the

Avalon-ST data interface signals are valid. When

you deassert the in_valid signal, the Avalon-ST

data interface signals are invalid and must be

disregarded. You can assert the in_valid signal

whenever data is available. However, the sink only

captures the data from the source when the IP core

asserts the in_ready signal.

in_data[] data Input Data input for each codeword, symbol by symbol.

Valid only when you assert the in_valid signal. For

Qsys systems, the in_data bus is:

[numn,numcheck,data] If you have no variable check

it is: [numn,data]

For example, for a maximum codeword length of

255 corresponding to 8 bits:

• in_data[7:0] = data

• indata_[15:0] = numn

in_channel channel Input Specifies the channel number for data the IP core

transfers on the current cycle. The in_channel

signal is available only when you configure the IP

core to support multiple channels.

in_startof-

packet

sop Input Start of packet (codeword) signal.

in_

endofpacket

eop Input End of packet (codeword) signal.

3-8

Reed-Solomon II IP Core Signals

UG-01090

2015.05.01

Altera Corporation

Reed-Solomon II IP Core Functional Description

Send Feedback

1 2 ... 19 20 21 22 23 24 25 26 27 28 29

Comentários a estes Manuais

Sem comentários

Altera Reed-Solomon II MegaCore Function Manual do Utilizador Página 24

Comentários a estes Manuais

Manuais e produtos relacionados com Instrumentos de medida Altera Reed-Solomon II MegaCore Function