Achronix Speedster22i User Macro Guide Bedienungsanleitung PDF herunterladen (Seite 108)

Memories BRAM80K

Speedster22i Macro Cell Library

AchronixSemiconductorProprietary PAGE 91

Parameters

Table 6-2: BRAM80K Parameters

Parameter Defined Values Default Value

porta_read_width,

portb_read_width

porta_write_width,

ortb_write_width

porta_write_mode,

ortb_write_mode

“write_first”

porta_clock_polarity,

ortb_clock_polarity

“rise“

porta_peval,

ortb_peval

1’b1

porta_latch_rstval,

rtb_latch_rstval

1’b1

porta_en_out_reg,

ortb_en_out_reg

1’b0

porta_reg_rstval,

rtb_reg_rstval

1’b1

porta_regce_priority,

ortb_regce_priority

“rstreg”

porta_initval,

por

tb_initval

40’h0

porta_srval,

rtb_srval

40’h0

mem_init_file “”

initd_000 – initd_255 256’hx

initp_00 – initp_31 256’hx

initpx_00 – initpx_31 256’hx

douta[31:0],

utb[31:0]

output

Port A(B) data output.

For read operations, the douta(doutb) outputs

are updated with the memory contents addressed by addra(addrb) if the

pea(peb) port enable is active and wea(web) inputs are low. For write

operations, if the porta_write_mode(portb_write_mode) parameter is set

to write_first, the douta(doutb) outputs are updated with the value pres-

ent on dina(dinb) if the pea(peb)

port enable is active and the corre-

sponding write enable input wea(web) is high.

doutpa[3:0],

utpb[3:0]

output

Port A(B) parity output.

The port A(B) doutpa(doutpb) parity output

behaves in the same manner as outputs douta(doutb) and is used when

the porta_read_width(portb_read_width) is set to 10, 20, or 40 bits.

doutpxa[3:0],

utpxb[3:0]

output

Port A(B) extended parity output.

The port A(B) doutpxa(doutpxb)

extended parity output behaves in the same manner as outputs

douta(doutb) and is used when the

porta_read_width(portb_read_width) is set to 10, 20, or 40 bits.

1, 2, 4, 5, 8, 9, 10, 16, 18, 20, 32, 36, 40

“write_first”, ”no_change”

“rise”, “fall”

1’b0,1’b1

“rstreg”, ”regce”

40-bit hexadecimal number

256 bit hexadecimal number

Name Type Description

1 2 ... 103 104 105 106 107 108 109 110 111 112 113 ... 223 224

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