Achronix Speedster22i User Macro Guide Instrukcja Użytkownika Pobierz pdf (Strona 167)

Memories BRAM80KECC

Speedster22i Macro Cell Library

AchronixSemiconductorProprietary PAGE 150

decoder_enable

The decoder_enable parameter defines if the ECC decodercircuitryis selected or bypassed.

Setting decoder_enable to 1’b1 enables the ECC decoder for normal operation.Setting

decoder_enable to 1’b0 disables the ECC decoder circuitry and allows the  dout, doutp, and

doutpxmemoryoutputstoberoutedtotheoutputportswithouterror

correction.Thedefault

valueofthedecoder_enableparameteris1’b1.

mem_init_file

The mem_init_file parameter provides a mechanism to set the initial contents of the

BRAM80KECC memory. If the mem_init_value is defined, the BRAM80KECC will be

initialized with the values defined in the file pointed to by the mem_init_file parameter

accordingtotheformatdefinedinthe

MemoryInitializationsection.If themem_init_fileis

leftatthedefaultvalueof“”,theinitialcontentswillbedefinedbythevaluesoftheinitd_000

‐ initd_ 255, initp_00‐initp_31, and the initpx_00‐initpx_3 1 parameters. If the memory

initializationparametersandthemem_init_fileparametersarenotdefined,thecontentsofthe

BRAM80Kwillbeinitializedtoallzeros.

initd_000 – initd_255

Theinitd_000throughinitd_255parametersdefinetheinitialcontentsofthememorycontents

associated with dout[31:0]. Each 256‐bit parameter associated  with the BRAM80KECC

memoryasdefinedinthe

MemoryInitializationsection.

initp_0 – initp_31

Theinitp_00 throughinitp_31parametersdefinetheinitialcontents ofthememorycontents

associated with doutp[3:0]. Each 256‐bit parameter associated with the BRAM80KECC

memoryasdefinedinthe

MemoryInitializationsection.

initpx_0 – initpx_31

Theinitpx_00throughinitpx_31parametersdefinetheinitialcontentsofthememorycontents

associated with doutpx[3:0]. Each 256‐bit parameter associated with the BRAM80KECC

memoryasdefinedinthe

MemoryInitializationsection.

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