Achronix Speedster22i User Macro Guide Manual do Utilizador descarregar pdf (Página 170)

Memories BRAM80KECCFIFO

Speedster22i Macro Cell Library

AchronixSemiconductorProprietary PAGE 153

BRAM80KECCFIFO

80k-bit FIFO Memory with Error Correction

BRAM80KECCFIFO

dout[31:0]

doutp[3:0]

full

read_err

sbit_error

din[31:0]

dinp[3:0]

wrrst

rdrst

outregce

dinpx[3:0]

wren

rden

rstreg

doutpx[3:0]

empty

almost_empty

almost_full

write_err

dbit_error

wrclk

rdclk

rdaddrecc[10:0]

Figure 6-27: Logic Symbol

TheBRAM80KECCFIFOimple

mentsa2kdeep,32‐bitwideFIFOmemoryblockutilizingthe

embedded BRAM80K blocks with dedicated pointer and flag circuitry.The

BRAM80KECCFIFOhas2klocationsof32‐bitdata. Thereadand  writeclocksmaybeeither

synchronousorasynchronouswithrespecttoeachother.Iftheuserreadandwri

teclocksare

the same clock, the user may set the sync_mode to 1’b1 to enable faster and synchronous

generationofthestatusflagoutputs.

Figure 6-28: BRAM80KEC

CFIFO Block Diagram

32-bit

ECC

Encoder

2kx40

Dual-Port

Memory

din[31:0]

outregce

rstreg

dinp[3:0]

dinpx[3:0]

32-bit

ECC

Decoder

din

dinp

dinpx

dout

doutp

doutpx

sbit_error

dbit_error

rdaddrecc

dbit_error

sbit_error

dout

doutp

doutpx

waddr

raddr

[10:0]

encoder_enable

decoder_enable

en_out_reg

[31:0]

[3:0]

Write

Pointer

Logic

Read

Pointer

Logic

Memory Control /

Flag Generation

Logic

full

empty

almost_full

almost_empty

write_err

read_err

wren

wrrst

wrclk

rdrst

rdclk

rden

1 2 ... 165 166 167 168 169 170 171 172 173 174 175 ... 223 224

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