?? mx25l1605.v
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end end disable fast_read_data; end else if ( status_reg[0] == 1'b0 ) begin //WIP:write in rpocess bit = 0 (1) if ( dpmode == 1'b0) begin //do work on non deep power down mode if ( pmode == 1'b0) begin // check parallel mode (2) if ( dummy_count ) begin { SO_reg, out_buf } <= #tCLQV { out_buf, out_buf[6] }; dummy_count = dummy_count - 1; end else begin rom_addr = rom_addr + 1; if ( enter4kbmode == 1'b0 ) begin // enter4kbmode = 1'b0 (3) out_buf = ROM_ARRAY[ rom_addr ]; end else begin // in enter4kbmode out_buf = ROM_4Kb_ARRAY[ rom_addr ]; end { SO_reg, out_buf } <= #tCLQV { out_buf, out_buf[6] }; dummy_count = 7 ; end end else begin if ( enter4kbmode == 1'b0 ) begin // enter4kbmode = 1'b0 (3) out_buf = ROM_ARRAY[ rom_addr ]; end else begin // in enter4kbmode out_buf = ROM_4Kb_ARRAY[ rom_addr ]; end {SO_reg,PO_reg6,PO_reg5,PO_reg4,PO_reg3,PO_reg2,PO_reg1,PO_reg0} <= #tCLQV {out_buf}; rom_addr = rom_addr + 1; //{SO,PO6,PO5,PO4,PO3,PO2,PO1,PO0} <= #tCLQV out_buf; end end end end // end forever end endtask /*---------------------------------------------------------------*/ /* Description: define a parallel mode task */ /*---------------------------------------------------------------*/ task parallel_mode; begin @( posedge CS ); if( CS == 1'b1 ) begin if ( dpmode == 1'b0) begin //do work on non deep power down mode //$display( $stime, " Old Pmode Register = %b", pmode ); pmode = 1; {ENB_S0,ENB_P0,ENB_S1,ENB_P1} = {1'b0,1'b1,1'b0,1'b0}; //$display( $stime, " New Pmode Register = %b", pmode ); end end end endtask /*---------------------------------------------------------------*/ /* Description: define a sector erase task */ /* 20(D8) AD1 AD2 AD3 */ /*---------------------------------------------------------------*/ task sector_erase; reg [`SECTOR_ADDR - 1:0] sector; reg [15:0] offset; // 64K Byte reg [`FLASH_ADDR - 1:0] rom_addr; integer i, start_addr,end_addr,start_4kb_addr,end_4kb_addr; reg bp0; reg bp1; reg bp2; reg bp3; begin sector[`SECTOR_ADDR - 1:0] = si_reg[22:16]; offset = 16'h0; start_addr = (si_reg[23:16]<<16) + 16'h0000; end_addr = (si_reg[23:16]<<16) + 16'hffff; start_4kb_addr = 9'h000; end_4kb_addr = 9'h1ff; if ( dpmode == 1'b0) begin //do work on non deep power down mode if (pmode == 0) begin {ENB_S0,ENB_P0,ENB_S1,ENB_P1} = {1'b1,1'b0,1'b0,1'b0}; end else begin {ENB_S0,ENB_P0,ENB_S1,ENB_P1} = {1'b0,1'b1,1'b0,1'b0}; end end forever begin @( posedge CS ); if( CS == 1'b1 ) begin if ( dpmode == 1'b0) begin //do work on non deep power down mode if (pmode == 0) begin {ENB_S0,ENB_P0,ENB_S1,ENB_P1} = {1'b1,1'b0,1'b0,1'b0}; end else begin {ENB_S0,ENB_P0,ENB_S1,ENB_P1} = {1'b0,1'b1,1'b0,1'b0}; end if(wp_reg==1'b0||status_reg[7]==1'b1) begin // Protected Mode end else if(dpmode == 1'b1) begin // deep power down mode end else begin if ( protected_area(sector[`SECTOR_ADDR - 1:0]) == 1'b1) begin end else if ( 16 <= sector && sector <=31 && bp2==1'b1 && bp1==1'b0 && bp0 ==1'b1) begin end else begin //WIP : write in process bit status_reg[0] = 1'b1; if ( enter4kbmode == 1'b0 ) begin // enter4kbmode = 1'b0 for( i = start_addr; i < (end_addr+1); i = i + 1 ) begin ROM_ARRAY[ i ] <= #`ERASE_TIME 8'hff; end end else begin // on enter4kbmode if ( si_reg[21:9]==0 ) begin // A21~A9=0 , A8~A0 customer defined for( i = start_4kb_addr; i < (end_4kb_addr + 1); i = i + 1 ) begin ROM_4Kb_ARRAY[ i ] <= #`ERASE_TIME 8'hff; end end end //WIP : write in process bit status_reg[0] <= #`ERASE_TIME 1'b0;//WIP //WEL : write enable latch status_reg[1] <= #`ERASE_TIME 1'b0;//WEL end end end disable sector_erase; end end // end forever end endtask /*---------------------------------------------------------------*/ /* Description: define a chip erase task */ /* 60(C7) */ /*---------------------------------------------------------------*/ task chip_erase; integer i; begin forever begin @( posedge CS ); if( CS == 1'b1 ) begin if ( dpmode == 1'b0 ) begin // do work on non deep power down mode if ( enter4kbmode == 1'b0) begin //do work on non enter4kbmode if ( wp_reg !=1'b0 && status_reg[7]!=1'b1 ) begin// protected mode if ( status_reg[1] == 1'b1 ) begin //WEL:Write Enable Latch if ( status_reg[2] == 1'b0 && status_reg[3] == 1'b0 && status_reg[3] == 1'b0 ) begin // WIP : write in process bit chip_erase_oe = 1'b1; status_reg[0] <= 1'b1; // for( i = 0; i < FLASH_SIZE; i = i+1 ) // begin // ROM_ARRAY[ i ] <= #`CHIP_ERASE_TIME 8'hff; // end // //WIP : write in process bit // status_reg[0] <= #`CHIP_ERASE_TIME 1'b0;//WIP // //WEL : write enable latch // status_reg[1] <= #`CHIP_ERASE_TIME 1'b0;//WEL end end end end // end enter4kbmode == 1'b0 end disable chip_erase; end // CS == 1'b1 end // end forever end endtask /*---------------------------------------------------------------*/ /* Description: define a page program task */ /* 02 AD1 AD2 AD3 */ /*---------------------------------------------------------------*/ task page_program; input [12:0] segment; input [7:0] offset; reg [`FLASH_ADDR - 1:0] rom_addr; // rom_addr = {segment, offset} integer dummy_count, tmp_int, i; begin dummy_count = 256; // page size offset[7:0] = 8'h00; // the start address of the page rom_addr[`FLASH_ADDR - 1:0] = { segment[ 12:0 ],offset[7:0] }; /*------------------------------------------------*/ /* Store 256 bytes into a temp buffer - dummy_A */ /*------------------------------------------------*/ while ( dummy_count ) begin rom_addr[`FLASH_ADDR - 1:0 ] = { segment[ 12:0 ], offset[ 7:0 ] }; dummy_count = dummy_count - 1; tmp_int = dummy_count << 3; /* transfer byte to bit */ { dummy_A[ tmp_int+7 ], dummy_A[ tmp_int+6 ], dummy_A[ tmp_int+5 ], dummy_A[ tmp_int+4 ], dummy_A[ tmp_int+3 ], dummy_A[ tmp_int+2 ], dummy_A[ tmp_int+1 ], dummy_A[ tmp_int ] } = ROM_ARRAY[ rom_addr ]; offset = offset + 1; end tmp_int = 0; sector[`SECTOR_ADDR - 1:0] = rom_addr[`FLASH_ADDR - 1:16]; address[23:0] = si_reg[23:0]; if (pmode == 0) begin {ENB_S0,ENB_P0,ENB_S1,ENB_P1} = {1'b1,1'b0,1'b0,1'b0}; end else begin {ENB_S0,ENB_P0,ENB_S1,ENB_P1} = {1'b0,1'b1,1'b0,1'b0}; pp_p = #100 1'b1; end forever begin @( posedge SCLK or posedge CS ); if ( CS == 1'b1 ) begin if ( dpmode == 1'b0 ) begin // do work on non deep power down mode if ( status_reg[0] == 1'b0 ) begin //WIP if ( wp_reg !=1'b0 && status_reg[7]!=1'b1 ) begin// protected mode if ( status_reg[1] == 1'b1 ) begin //WEL:Write Enable Latch if ( protected_area(sector[`SECTOR_ADDR - 1:0]) == 1'b0 ) begin // check protected area (3) //$display( $stime, " Total write %d bits", tmp_int ); if ( pmode == 1'b0 ) begin for( i = 1; i <= tmp_int; i=i+1 ) begin if( dummy_A[ 256*8-i ] == 1'b1 ) begin // 1 -> 1 ,1 -> 0 dummy_A[ 256*8-i ] = si_reg[ tmp_int-i ]; end end end else begin for( i = 1; i <= tmp_int; i=i+1 ) begin if( dummy_A[ 256*8-i ] == 1'b1 ) begin // 1 -> 1 ,1 -> 0 dummy_A[ 256*8-i ] = psi_reg[ tmp_int-i ]; end end // for( i = 1; i <= tmp_int; i=i+8 ) begin // if( dummy_A[ 256*8-i-0 ] == 1'b1 ) begin // dummy_A[ 256*8-i-0 ] = psi_reg[ tmp_int-i-0 ]; // end // if( dummy_A[ 256*8-i-1 ] == 1'b1 ) begin // dummy_A[ 256*8-i-1 ] = psi_reg[ tmp_int-i-1 ]; // end // if( dummy_A[ 256*8-i-2 ] == 1'b1 ) begin // dummy_A[ 256*8-i-2 ] = psi_reg[ tmp_int-i-2 ]; // end // if( dummy_A[ 256*8-i-3 ] == 1'b1 ) begin // dummy_A[ 256*8-i-3 ] = psi_reg[ tmp_int-i-3 ]; // end // if( dummy_A[ 256*8-i-4 ] == 1'b1 ) begin // dummy_A[ 256*8-i-4 ] = psi_reg[ tmp_int-i-4 ]; // end // if( dummy_A[ 256*8-i-5 ] == 1'b1 ) begin // dummy_A[ 256*8-i-5 ] = psi_reg[ tmp_int-i-5 ]; // end // if( dummy_A[ 256*8-i-6 ] == 1'b1 ) begin // dummy_A[ 256*8-i-6 ] = psi_reg[ tmp_int-i-6 ]; // end // if( dummy_A[ 256*8-i-7 ] == 1'b1 ) begin // dummy_A[ 256*8-i-7 ] = psi_reg[ tmp_int-i-7 ]; // end?? 快捷鍵說明
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