Nand Flash Controller

• ONFI 2.1
• Code idea from Cosmos-plus-OpenSSD
• DDR mode

NFC Interface

Configure Interface

    input   [5:0]                  iOpcode                 ;
    input   [4:0]                  iTargetID               ;
    input   [31:0]                 iAddress                ;
    input   [15:0]                 iLength                 ;
    input                          iCMDValid               ;
    output                         oCMDReady               ;

Data Output Interface

    input   [15:0]                 iWriteData              ;
    input                          iWriteLast              ;
    input                          iWriteValid             ;
    input   [1:0]                  iWriteKeep              ;
    output                         oWriteReady             ;

Data Input Interface

    output  [15:0]                 oReadData               ;
    output                         oReadLast               ;
    output                         oReadValid              ;
    output  [1:0]                  oReadKeep               ;
    input                          iReadReady              ;

Status Interface

    output  [NumberOfWays - 1:0]   oReadyBusy              ;
    
    output  [23:0]                 oStatus                 ;
    output                         oStatusValid            ;

Nand Flash Physics Interface

    inout                          IO_NAND_DQS             ;
    inout                  [7:0]   IO_NAND_DQ              ;
    output  [NumberOfWays - 1:0]   O_NAND_CE               ;
    output                         O_NAND_WE               ;
    output                         O_NAND_RE               ;
    output                         O_NAND_ALE              ;
    output                         O_NAND_CLE              ;
    input   [NumberOfWays - 1:0]   I_NAND_RB               ;
    output                         O_NAND_WP               ;

Modules and Files

Module/Files	Description
NandFlashController_Top_AXI	AXI and AXIS Interface Top Module
NandFlashController_Top	Raw Interface Top Module
NFC_Command_*	Command Decode
NFC_Atom_*	Atom Command (Command/Address/DataIn/DataOut)
NFC_Phy*	Pinpad

How to Use

Select Way

• opcode : 6'b100000
• address : {24'd0, 8'b0000_0001} means select way 0

Set Column Address

• opcode : 6'b100010
• address : {16'd0, Col_addr_2Bytes}

Set Row Address

• opcode : 6'b100100
• address : {8'd0, Row_addr_3Bytes}

Reset(FFh)

• Async
• opcode : 6'b000001

Nand Flash need Reset when power up.

Set Feature(EFh)

• Async
• opcode : 6'b000010

Set Timing mode to Sync mode 0-5.

MT29F64G can run Sync mode 4.

Get Feature(EEh)

• Sync
• opcode : 6'b000101

Get the current Feature.

Program Page(80h)

• Sync
• opcode : 6'b000011
• targetID : 5'b00000 Program page normal(10h)
• targetID : 5'b00001 Program page cache(15h)
• targetID : 5'b00010 Program page multi-plane(11h)
• length : 4320 means 4320 Bytes, must be even

Read Page(00h)

• Sync
• opcode : 6'b000100
• length : 4320 means 4320 Bytes, must be even

Erase Block(60h)

• Sync
• opcode : 6'b000110
• targetID : 5'b00000 Erase Block normal(D0h)
• targetID : 5'b00010 Erase Block multi-plane(D1h)

Read Status(70h/78h)

• Sync
• opcode : 6'b000111
• targetID : 5'b00000 Read Status normal(70h)
• targetID : 5'b00001 Read Status Enhanced(78h)