flashcmd
Module Instance Base Address Register Address
i_qspi_qspiregs 0xFF8D2000 0xFF8D2090

Size: 32

Offset: 0x90

Access: RW

Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
Bit Fields
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

cmdopcode

RW 0x0

enrddata

RW 0x0

numrddatabytes

RW 0x0

encmdaddr

RW 0x0

enmodebit

RW 0x0

numaddrbytes

RW 0x0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

enwrdata

RW 0x0

numwrdatabytes

RW 0x0

numdummybytes

RW 0x0

flash_cmd_cntrl_resv1_fld

RO 0x0

cmdexecstat

RO 0x0

execcmd

WO 0x0

flashcmd Fields

Bit Name Description Access Reset
31:24 cmdopcode 
 The command opcode field should be setup before triggering the command. For example, 0x20 maps to SubSector Erase. Writeing to the execute field (bit 0) of this register launches the command. NOTE : Using this approach to issue commands to the device will make use of the instruction type of the device instruction configuration register. If this field is set to 2'b00, then the command opcode, command address, command dummy bytes and command data will all be transferred in a serial fashion. If this field is set to 2'b01, then the command opcode, command address, command dummy bytes and command data will all be transferred in parallel using DQ0 and DQ1 pins. If this field is set to 2'b10, then the command opcode, command address, command dummy bytes and command data will all be transferred in parallel using DQ0, DQ1, DQ2 and DQ3 pins.
RW 0x0
23 enrddata 
 Set to 1 if the command specified in the command opcode field (bits 31:24) requires read data bytes to be received from the device.
Value Description
0 No Action
1 Command Requires read data
RW 0x0
22:20 numrddatabytes 
 Up to 8 data bytes may be read using this command. Set to 0 for 1 byte and 7 for 8 bytes.
Value Description
0 Read 1 Byte
1 Read 2 Byte
2 Read 3 Byte
3 Read 4 Byte
4 Read 5 Byte
5 Read 6 Byte
6 Read 7 Byte
7 Read 8 Byte
RW 0x0
19 encmdaddr 
 Set to 1 if the command specified in bits 31:24 requires an address. This should be setup before triggering the command via writing a 1 to the execute field.
Value Description
0 No Action
1 Command in bits 31:24 requires address
RW 0x0
18 enmodebit 
 Set to 1 to ensure the mode bits as defined in the Mode Bit Configuration register are sent following the address bytes.
Value Description
0 No Action
1 Mode Bit follows address bytes
RW 0x0
17:16 numaddrbytes 
 Set to the number of address bytes required (the address itself is programmed in the FLASH COMMAND ADDRESS REGISTERS). This should be setup before triggering the command via bit 0 of this register. 2'b00 : 1 address byte 2'b01 : 2 address bytes 2'b10 : 3 address bytes 2'b11 : 4 address bytes
Value Description
0 Write 1 Address Byte
1 Write 2 Address Bytes
2 Write 3 Address Bytes
3 Write 4 Address Bytes
RW 0x0
15 enwrdata 
 Set to 1 if the command specified in the command opcode field requires write data bytes to be sent to the device.
Value Description
0 No Action
1 Command requires write data bytes
RW 0x0
14:12 numwrdatabytes 
 Up to 8 Data bytes may be written using this command Set to 0 for 1 byte, 7 for 8 bytes.
Value Description
0 Write 1 Byte
1 Write 2 Byte
2 Write 3 Byte
3 Write 4 Byte
4 Write 5 Byte
5 Write 6 Byte
6 Write 7 Byte
7 Write 8 Byte
RW 0x0
11:7 numdummybytes 
 Set to the number of dummy bytes required This should be setup before triggering the command via the execute field of this register.
RW 0x0
6:2 flash_cmd_cntrl_resv1_fld 


                     		

                     
                        RO
                     

                     
                        0x0
                     

                  


                  

                     1

                     
                        cmdexecstat
                     

                     
                        
Command execution in progress.


                        

                           

                                 Value

                                 Description

                              



                                 0

                                 No Action 

                              



                                 1

                                 Command Execution Status

                              




                        


                     		

                     
                        RO
                     

                     
                        0x0
                     

                  


                  

                     0

                     
                        execcmd
                     

                     
                        
Execute the command.


                        

                           

                                 Value

                                 Description

                              



                                 0

                                 No Action 

                              



                                 1

                                 Execute Command

                              




                        


                     		

                     
                        WO
                     

                     
                        0x0