DDR3verilog代码.doc

/* File Name: ddr3.v* Version: 1.61* Model: BUS Functional* Dependencies: ddr3_parameters.vh* Description: Micron SDRAM DDR3 (Double Data Rate 3)* Limitation: - doesnt check for average refresh timings* - positive ck and ck_n edges are used to form internal clock* - positive dqs and dqs_n edges are used to latch data* - test mode is not modeled* - Duty Cycle Corrector is not modeled* - Temperature Compensated Self Refresh is not modeled* - DLL off mode is not modeled.* Note: - Set simulator resolution to ps accuracy* - Set DEBUG = 0 to disable $display messages* Disclaimer This software code and all associated documentation, comments or other * of Warranty: information (collectively Software) is provided AS IS without * warranty of any kind. MICRON TECHNOLOGY, INC. (MTI) EXPRESSLY * DISCLAIMS ALL WARRANTIES EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED * TO, NONINFRINGEMENT OF THIRD PARTY RIGHTS, AND ANY IMPLIED WARRANTIES * OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. MTI DOES NOT * WARRANT THAT THE SOFTWARE WILL MEET YOUR REQUIREMENTS, OR THAT THE * OPERATION OF THE SOFTWARE WILL BE UNINTERRUPTED OR ERROR-FREE. * FURTHERMORE, MTI DOES NOT MAKE ANY REPRESENTATIONS REGARDING THE USE OR * THE RESULTS OF THE USE OF THE SOFTWARE IN TERMS OF ITS CORRECTNESS, * ACCURACY, RELIABILITY, OR OTHERWISE. THE ENTIRE RISK ARISING OUT OF USE * OR PERFORMANCE OF THE SOFTWARE REMAINS WITH YOU. IN NO EVENT SHALL MTI, * ITS AFFILIATED COMPANIES OR THEIR SUPPLIERS BE LIABLE FOR ANY DIRECT, * INDIRECT, CONSEQUENTIAL, INCIDENTAL, OR SPECIAL DAMAGES (INCLUDING, * WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, * OR LOSS OF INFORMATION) ARISING OUT OF YOUR USE OF OR INABILITY TO USE * THE SOFTWARE, EVEN IF MTI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH * DAMAGES. Because some jurisdictions prohibit the exclusion or * limitation of liability for consequential or incidental damages, the * above limitation may not apply to you.* Copyright 2003 Micron Technology, Inc. All rights reserved.* Rev Author Date Changes* -* 0.41 JMK 05/12/06 Removed auto-precharge to power down error check.* 0.42 JMK 08/25/06 Created internal clock using ck and ck_n.* TDQS can only be enabled in EMR for x8 configurations.* CAS latency is checked vs frequency when DLL locks.* Improved checking of DQS during writes.* Added true BL4 operation.* 0.43 JMK 08/14/06 Added checking for setting reserved bits in Mode Registers.* Added ODTS Readout.* Replaced tZQCL with tZQinit and tZQoper* Fixed tWRPDEN and tWRAPDEN during BC4MRS and BL4MRS.* Added tRFC checking for Refresh to Power-Down Re-Entry.* Added tXPDLL checking for Power-Down Exit to Refresh to Power-Down Entry* Added Clock Frequency Change during Precharge Power-Down.* Added -125x speed grades.* Fixed tRCD checking during Write.* 1.00 JMK 05/11/07 Initial release* 1.10 JMK 06/26/07 Fixed ODTH8 check during BLOTF* Removed temp sensor readout from MPR* Updated initialization sequence* Updated timing parameters* 1.20 JMK 09/05/07 Updated clock frequency change* Added ddr3_dimm module* 1.30 JMK 01/23/08 Updated timing parameters* 1.40 JMK 12/02/08 Added support for DDR3-1866 and DDR3-2133* renamed ddr3_dimm.v to ddr3_module.v and added SODIMM support.* Added multi-chip package model support in ddr3_mcp.v* 1.50 JMK 05/04/08 Added 1866 and 2133 speed grades.* 1.60 MYY 07/10/09 Merging of 1.50 version and pre-1.0 version changes* 1.61 SPH 12/10/09 Only check tIH for cmd_addr if CS# LOW*/ DO NOT CHANGE THE TIMESCALE/ MAKE SURE YOUR SIMULATOR USES PS RESOLUTIONtimescale 1ps / 1ps/ model flags/ define MODEL_PASRmodule ddr3 ( rst_n, ck, / ck_n, cke, cs_n, ras_n, cas_n, we_n, dm_tdqs, ba, addr, dq, dqs, dqs_n, tdqs_n, / odt); include ddr3_parameters.vh parameter check_strict_mrbits = 1; parameter check_strict_timing = 1; parameter feature_pasr = 1; parameter feature_truebl4 = 0; / text macros define DQ_PER_DQS DQ_BITS/DQS_BITS define BANKS (1BA_BITS) define MAX_BITS (BA_BITS+ROW_BITS+COL_BITS-BL_BITS) define MAX_SIZE (1(BA_BITS+ROW_BITS+COL_BITS-BL_BITS) define MEM_SIZE (1MEM_BITS) define MAX_PIPE 4*CL_MAX / Declare Ports input rst_n; input ck; input ck_n; input cke; input cs_n; input ras_n; input cas_n; input we_n; inout DM_BITS-1:0 dm_tdqs; input BA_BITS-1:0 ba; input ADDR_BITS-1:0 addr; inout DQ_BITS-1:0 dq; inout DQS_BITS-1:0 dqs; inout DQS_BITS-1:0 dqs_n; output DQS_BITS-1:0 tdqs_n; input odt; / clock jitter real tck_avg; time tck_sample TDLLK-1:0; time tch_sample TDLLK-1:0; time tcl_sample TDLLK-1:0; time tck_i; time tch_i; time tcl_i; real tch_avg; real tcl_avg; time tm_ck_pos; time tm_ck_neg; real tjit_per_rtime; integer tjit_cc_time; real terr_nper_rtime; /DDR3 clock jitter variables real tjit_ch_rtime; real duty_cycle; / clock skew real out_delay; integer dqsck DQS_BITS-1:0; integer dqsck_min; integer dqsck_max; integer dqsq_min; integer dqsq_max; integer seed; / Mode Registers reg ADDR_BITS-1:0 mode_reg BANKS-1:0; reg burst_order; reg BL_BITS:0 burst_length; reg blotf; reg truebl4; integer cas_latency; reg dll_reset; reg dll_locked; integer write_recovery; reg low_power; reg dll_en; reg 2:0 odt_rtt_nom; reg 1:0 odt_rtt_wr; reg odt_en; reg dyn_odt_en; reg 1:0 al; integer additive_latency; reg write_levelization; reg duty_cycle_corrector; reg tdqs_en; reg out_en; reg 2:0 pasr; integer cas_write_latency; reg asr; / auto self refresh reg srt; / self refresh temperature range reg 1:0 mpr_select; reg mpr_en; reg odts_readout; integer read_latency; integer write_latency; / cmd encoding parameter / cs, ras, cas, we LOAD_MODE = 4b0000, REFRESH = 4b0001, PRECHARGE = 4b0010, ACTIVATE = 4b0011, WRITE = 4b0100, READ = 4b0101, ZQ = 4b0110, NOP = 4b0111, / DESEL = 4b1xxx, PWR_DOWN = 4b1000, SELF_REF = 4b1001 ; reg 8*9-1:0 cmd_string 9:0; initial begin cmd_stringLOAD_MODE = Load Mode; cmd_stringREFRESH = Refresh ; cmd_stringPRECHARGE = Precharge; cmd_stringACTIVATE = Activate ; cmd_stringWRITE = Write ; cmd_stringREAD = Read ; cmd_stringZQ = ZQ ; cmd_stringNOP = No Op ; cmd_stringPWR_DOWN = Pwr Down ; cmd_stringSELF_REF = Self Ref ; end / command state reg BANKS-1:0 active_bank; reg BANKS-1:0 auto_precharge_bank; reg BANKS-1:0 write_precharge_bank; reg BANKS-1:0 read_precharge_bank; reg ROW_BITS-1:0 active_row BANKS-1:0; reg in_power_down; reg in_self_refresh; reg 3:0 init_mode_reg; reg init_dll_reset; reg init_done; integer init_step; reg zq_set; reg er_trfc_max; reg odt_state; reg odt_state_dly; reg dyn_odt_state; reg dyn_odt_state_dly; reg prev_odt; wire 7:0 calibration_pattern = 8b10101010; / value returned during mpr pre-defined pattern readout wire 7:0 temp_sensor = 8h01; / value returned during mpr temp sensor readout reg 1:0 mr_chk; reg rd_bc; integer banki; / cmd timers/counters integer ref_cntr; integer odt_cntr; integer ck_cntr; integer ck_txpr; integer ck_load_mode; integer ck_refresh; integer ck_precharge; integer ck_activate; integer ck_write; integer ck_read; integer ck_zqinit; integer ck_zqoper; integer ck_zqcs; integer ck_power_down; integer ck_slow_exit_pd; integer ck_self_refresh; integer ck_freq_change; integer ck_odt; integer ck_odth8; integer ck_dll_reset; integer ck_cke_cmd; integer ck_bank_write BANKS-1:0; integer ck_bank_read BANKS-1:0; integer ck_group_activate 1:0; integer ck_group_write 1:0; integer ck_group_read 1:0; time tm_txpr; time tm_load_mode; time tm_refresh; time tm_precharge; time tm_activate; time tm_write_end; time tm_power_down; time tm_slow_exit_pd; time tm_self_refresh; time tm_freq_change; time tm_cke_cmd; time tm_ttsinit; time tm_bank_precharge BANKS-1:0; time tm_bank_activate BANKS-1:0; time tm_bank_write_end BANKS-1:0; time tm_bank_read_end BANKS-1:0; time tm_group_activate 1:0; time tm_group_write_end 1:0; / pipelines reg MAX_PIPE:0 al_pipeline; reg MAX_PIPE:0 wr_pipeline; reg MAX_PIPE:0 rd_pipeline; reg MAX_PIPE:0 odt_pipeline; reg MAX_PIPE:0 dyn_odt_pipeline; reg BL_BITS:0 bl_pipeline MAX_PIPE:0; reg BA_BITS-1:0 ba_pipeline MAX_PIPE:0; reg ROW_BITS-1:0 row_pipeline MAX_PIPE:0; reg COL_BITS-1:0 col_pipeline MAX_PIPE:0; reg prev_cke; / data state reg BL_MAX*DQ_BITS-1:0 memory_data; reg BL_MAX*DQ_BITS-1:0 bit_mask; reg BL_BITS-1:0 burst_position; reg BL_BITS:0 burst_cntr; reg DQ_BITS-1:0 dq_temp; reg 31:0 check_write_postamble; reg 31:0 check_write_preamble; reg 31:0 check_write_dqs_high; reg 31:0 check_write_dqs_low; reg 15:0 check_dm_tdipw; reg 63:0 check_dq_tdipw; / data timers/counters time tm_rst_n; time tm_cke; time tm_odt; time tm_tdqss; time tm_dm 15:0; time tm_dqs 15:0; time tm_dqs_pos 31:0; time tm_dqss_pos 31:0; time tm_dqs_neg 31:0; time tm_dq 63:0; time tm_cmd_addr 22:0; reg 8*7-1:0 cmd_addr_string 22:0; initial begin cmd_addr_string 0 = CS_N ; cmd_addr_string 1 = RAS_N ; cmd_addr_string 2 = CAS_N ; cmd_addr_string 3 = WE_N ; cmd_addr_string 4 = BA 0 ; cmd_addr_string 5 = BA 1 ; cmd_addr_string 6 = BA 2 ; cmd_addr_string 7 = ADDR 0; cmd_addr_string 8 = ADDR 1; cmd_addr_string 9 = ADDR 2; cmd_addr_string10 = ADDR 3; cmd_addr_string11 = ADDR 4; cmd_addr_string12 = ADDR 5; cmd_addr_string13 = ADDR 6; cmd_addr_string14 = ADDR 7; cmd_addr_string15 = ADDR 8; cmd_addr_string16 = ADDR 9; cmd_addr_string17 = ADDR 10; cmd_addr_string18 = ADDR 11; cmd_addr_string19 = ADDR 12; cmd_addr_string20 = ADDR 13; cmd_addr_string21 = ADDR 14; cmd_addr_string22 = ADDR 15; end reg 8*5-1:0 dqs_string 1:0; initial begin dqs_string0 = DQS ; dqs_string1 = DQS_N; end / Memory Storageifdef MAX_MEM parameter RFF_BITS = DQ_BITS*BL_MAX; / %z format uses 8 bytes for every 32 bits or less. parameter RFF_CHUNK = 8 * (RFF_BITS/32 + (RFF_BITS%32 ? 1 : 0); reg 1024:1 tmp_model_dir; integer memfdBANKS-1:0; initial begin : file_io_open integer bank; if (!$value$plusargs(model_data+%s, tmp_model_dir) begin tmp_model_dir = /tmp; $display( %m: at time %t WARNING: no +model_data option specified, using /tmp., $time ); end for (bank = 0; bank BANKS; bank = bank + 1) memfdbank = open_bank_file(bank); endelse reg BL_MAX*DQ_BITS-1:0 memory 0:MEM_SIZE-1; reg MAX_BITS-1:0 address 0:MEM_SIZE-1; reg MEM_BITS:0 memory_index; reg MEM_BITS:0 memory_used = 0;endif / receive reg rst_n_in; reg ck_in; reg ck_n_in; reg cke_in; reg cs_n_in; reg ras_n_in; reg cas_n_in; reg we_n_in; reg 15:0 dm_in; reg 2:0 ba_in; reg 15:0 addr_in; reg 63:0 dq_in; reg 31:0 dqs_in; reg odt_in; reg 15:0 dm_in_pos; reg 15:0 dm_in_neg; reg 63:0 dq_in_pos; reg 63:0 dq_in_neg; reg dq_in_valid; reg dqs_in_valid; integer wdqs_cntr; integer wdq_cntr; integer wdqs_pos_cntr 31:0; reg b2b_write; reg BL_BITS:0 wr_burst_length; reg 31:0 prev_dqs_in; reg diff_ck; always (rst_n ) rst_n_in = #BUS_DELAY rst_n; always (ck ) ck_in = #BUS_DELAY ck; always (ck_n ) ck_n_in = #BUS_DELAY ck_n; always (cke ) cke_in = #BUS_DELAY cke; always (cs_n ) cs_n_in = #BUS_DELAY cs_n; always (ras_n ) ras_n_in = #BUS_DELAY ras_n; always (cas_n ) cas_n_in = #BUS_DELAY cas_n; always (we_n ) we_n_in = #BUS_DELAY we_n; always (dm_tdqs) dm_in = #BUS_DELAY dm_tdqs; always (ba ) ba_in = #BUS_DELAY ba; always (addr ) addr_in = #BUS_DELAY addr; always (dq ) dq_in = #BUS_DELAY dq; always (dqs or dqs_n) dqs_in = #BUS_DELAY (dqs_n16) | dqs; always (odt ) odt_in = #BUS_DELAY odt; / create internal clock always (posedge ck_in) diff_ck = ck_in; always (posedge ck_n_in) diff_ck = ck_n_in; wire 15:0 dqs_even = dqs_in15:0; wire 15:0 dqs_odd = dqs_in31:16; wire 3:0 cmd_n_in = !cs_n_in ? ras_n_in, cas_n_in, we_n_in : NOP; /deselect = nop / transmit reg dqs_out_en; reg DQS_BITS-1:0 dqs_out_en_dly; reg dqs_out; reg DQS_BITS-1:0 dqs_out_dly; reg dq_out_en; reg DQ_BITS-1:0 dq_out_en_dly; reg DQ_BITS-1:0 dq_out; reg DQ_BITS-1:0 dq_out_dly; integer rdqsen_cntr; integer rdqs_cntr; integer rdqen_cntr; integer rdq_cntr; bufif1 buf_dqs DQS_BITS-1:0 (dqs, dqs_out_dly, dqs_out_en_dly & DQS_BITSout_en); bufif1 buf_dqs_n DQS_BITS-1:0 (dqs_n, dqs_out_dly, dqs_out_en_dly & DQS_BITSout_en); bufif1 buf_dq DQ_BITS-1:0 (dq, dq_out_dly, dq_out_en_dly & DQ_BITS out_en); assign tdqs_n = DQS_BITS1bz; initial begin if (BL_MAX = 2. nBL_MAX = %d, BL_MAX); if (1 BL_MAX) $display(%m ERROR: 2BO_BITS cannot be greater than BL_MAX parameter.); $timeformat (-12, 1, ps, 1); seed = RANDOM_SEED; ck_cntr = 0; end function integer ge