|
楼主 |
发表于 2012-6-6 09:10:21
|
显示全部楼层
想继续问下,模型仿真程序的问题,附程序
这个程序看它的RTL VIEWER
bank0 和 bank1的RTL VIEWER怎么是这样啊,自动生成了一个ASYNC_RAM,如附件图所示- // IS61LV25616 Asynchronous SRAM, 256K x 16 = 4M; speed: 10ns.
- // Note; 1) Please include "+define+ OEb" in running script if you want to check
- // timing in the case of OE_ being set.
- // 2) Please specify access time by defining tAC_10 or tAC_12.
- // `define OEb
- `define tAC_10
- `timescale 1ns/10ps
- module IS61LV25616 (A, IO, CE_, OE_, WE_, LB_, UB_);
- parameter dqbits = 16;
- parameter memdepth = 262143;
- parameter addbits = 18;
- parameter Toha = 2;
- parameter Tsa = 2;
- `ifdef tAC_10
- parameter Taa = 10,
- Thzce = 3,
- Thzwe = 5;
- `endif
- `ifdef tAC_12
- parameter Taa = 12,
- Thzce = 5,
- Thzwe = 6;
- `endif
- input CE_, OE_, WE_, LB_, UB_;
- input [(addbits - 1) : 0] A;
- inout [(dqbits - 1) : 0] IO;
-
- wire [(dqbits - 1) : 0] dout;
- reg [(dqbits/2 - 1) : 0] bank0 [0 : memdepth];
- reg [(dqbits/2 - 1) : 0] bank1 [0 : memdepth];
- // wire [(dqbits - 1) : 0] memprobe = {bank1[A], bank0[A]};
- wire r_en = WE_ & (~CE_) & (~OE_);
- wire w_en = (~WE_) & (~CE_) & ((~LB_) | (~UB_));
- assign #(r_en ? Taa : Thzce) IO = r_en ? dout : 16'bz;
- initial
- $timeformat (-9, 0.1, " ns", 10);
- assign dout [(dqbits/2 - 1) : 0] = LB_ ? 8'bz : bank0[A];
- assign dout [(dqbits - 1) : (dqbits/2)] = UB_ ? 8'bz : bank1[A];
- always @(A or w_en)
- begin
- #Tsa
- if (w_en)
- #Thzwe
- begin
- bank0[A] = LB_ ? bank0[A] : IO [(dqbits/2 - 1) : 0];
- bank1[A] = UB_ ? bank1[A] : IO [(dqbits - 1) : (dqbits/2)];
- end
- end
-
- // Timing Check
- `ifdef tAC_10
- specify
- specparam
- tSA = 0,
- tAW = 8,
- tSCE = 8,
- tSD = 6,
- tPWE2 = 10,
- tPWE1 = 8,
- tPBW = 8;
- `else
- `ifdef tAC_10
- specify
- specparam
- tSA = 0,
- tAW = 8,
- tSCE = 8,
- tSD = 6,
- tPWE2 = 12,
- tPWE1 = 8,
- tPBW = 8;
- `endif
- `endif
- $setup (A, negedge CE_, tSA);
- $setup (A, posedge CE_, tAW);
- $setup (IO, posedge CE_, tSD);
- $setup (A, negedge WE_, tSA);
- $setup (IO, posedge WE_, tSD);
- $setup (A, negedge LB_, tSA);
- $setup (A, negedge UB_, tSA);
- $width (negedge CE_, tSCE);
- $width (negedge LB_, tPBW);
- $width (negedge UB_, tPBW);
- `ifdef OEb
- $width (negedge WE_, tPWE1);
- `else
- $width (negedge WE_, tPWE2);
- `endif
- endspecify
- endmodule
复制代码 |
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有帐号?注册
x
|