- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Email to a Friend
- Report Inappropriate Content
Hi,
I am trying to read a bunch of data from SSRAM (IS61LPS25636A)) on Cyclone III, which is 256k*32 bit in size. However, from the board manual, there are 32 data bits, 21 address bit (should be 18 bits for 256k), Does anybody know this problem? I tried to use this following code to read singe data from single address, but I can only read the address 00000h, even I change the address value, the output is still the vaule at 00000h? Does anybody have this code to reach this memory? I appreciate it very much if you could share your code or give some suggestions? Thanks. In addition, I tried to follow the datasheet of this memory, but it is hard to understand its operation, especially 'burst read'. pleaseeeee help. you could find the datasheet here http://www.issi.com/pdf/61vps_lps25636a_51218a.pdf and the manual for this board here http://www.altera.com/literature/manual/rm_ciii_starter_board.pdf module mem_read( ssram_clk, reset_n, ssram_adsc_n, ssram_bw_n, ssram_bwe_n, ssram_ce_n, flash_ssram_a, flash_ssram_d, ssram_oe_n, test_led ); input ssram_clk; input reset_n; output wire ssram_adsc_n; output wire [3:0] ssram_bw_n; output wire ssram_bwe_n; output wire ssram_ce_n; output wire [22:2] flash_ssram_a; input [31: 0] flash_ssram_d; output wire ssram_oe_n; output reg [3:0] test_led; assign ssram_adsc_n=1'b1; assign ssram_bw_n=4'b1111; assign ssram_bwe_n=1'b1; assign ssram_ce_n=1'b0; assign flash_ssram_a=21'b011111111111111110000; assign ssram_oe_n=1'b0; always@(posedge ssram_clk, posedge reset_n) begin if (reset_n) test_led <=4'b0; else test_led <=flash_ssram_d[31:28]; end endmoduleLink Copied
0 Replies

Reply
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page