Achronix Speedster22i User Macro Guide Manual do Utilizador descarregar pdf (Página 136)

Memories BRAM80KFIFO

Speedster22i Macro Cell Library

AchronixSemiconductorProprietary PAGE 119

BRAM80KFIFO

80k-bit FIFO Memory

BRAM80KFIFO

dout[31:0]

doutp[3:0]

full

read_err

wrcount[16:0]

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

rdcount[16:0]

wrclk

rdclk

Figure 6-7: Logic Symbol

The BRAM80KFIF

O implements a 80k‐bit FIFO memory block utilizing the embedded

BRAM80K blocks with dedicated pointer and flag circuitry.The BRA M80KFIFO can be

configuredtosupportavarietyofwidthsanddepths,rangingfrom2k‐depthwith40‐bitdata

downto64k‐depthwith1‐bitdata.Thereadandwr

iteclocksmaybeeithersynchronousor

asynchronouswithrespecttoeachother.Iftheuserreadandwriteclocksarethesameclock,

the user may set the sync_mode to 1’b1 to enable faster and synchronous generation of the

statusflagsandFIFOpointeroutputs.

Figure 6-8: BR

AM80KFIFO Block Diagram

BRAM80K

dout,

Memory

Write

Pointer

Logic

Read

Pointer

Logic

Memory Control /

Flag Generation

Logic

din,

(optional)

wren

wrrst

wrclk

rdrst

rdclk

outregce

rstreg

doutp,

doutpx

dinp,

dinpx

wrcount

rdcount

full

empty

almost_full

almost_empty

write_err

read_err

rden

1 2 ... 131 132 133 134 135 136 137 138 139 140 141 ... 223 224

Comentários a estes Manuais

Sem comentários

Achronix Speedster22i User Macro Guide Manual do Utilizador Página 136

Comentários a estes Manuais