devwr

Module Instance	Base Address	Register Address
`i_qspi_qspiregs`	`0xFF8D2000`	`0xFF8D2008`

Size: 32

Offset: 0x8

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
`wr_instr_resv4_fld` `RO 0x0`			`dummywrclks` `RW 0x0`					`wr_instr_resv3_fld` `RO 0x0`						`datawidth` `RW 0x0`
15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
`wr_instr_resv2_fld` `RO 0x0`		`addrwidth` `RW 0x0`		`wr_instr_resv1_fld` `RO 0x0`				`wropcode` `RW 0x2`

devwr Fields

Bit

Name

Description

Access

Reset

31:29

wr_instr_resv4_fld

RO

0x0

28:24

dummywrclks

 Number of dummy clock cycles required by device for write instruction.

RW

0x0

23:18

wr_instr_resv3_fld

RO

0x0

17:16

datawidth

 0 : SIO mode data is shifted to the device on DQ0 only and from the device on DQ1 only 1 : Used for Dual Input/Output instructions. For data transfers, DQ0 and DQ1 are used as both inputs and outputs. 2 : Used for Quad Input/Output instructions. For data transfers, DQ0,DQ1,DQ2 and DQ3 are used as both inputs and outputs.

Value	Description
0	Write data transferred on DQ0. Supported by all SPI flash devices
1	Read data transferred on DQ0 and DQ1. Supported by some SPI flash devices that support the Extended SPI Protocol and by all SPI flash devices that support the Dual SP (DIO-SPI) Protocol.
2	Read data transferred on DQ0, DQ1, DQ2, and DQ3. Supported by some SPI flash devices that support the Extended SPI Protocol and by all SPI flash devices that support the Quad SP (QIO-SPI) Protocol.

RW

0x0

15:14

wr_instr_resv2_fld

RO

0x0

13:12

addrwidth

 0 : Addresses can be shifted to the device on DQ0 only 1 : Addresses can be shifted to the device on DQ0 and DQ1 only 2 : Addresses can be shifted to the device on DQ0, DQ1, DQ2 and DQ3

Value	Description
0	Write address transferred on DQ0. Supported by all SPI flash devices
1	Read address transferred on DQ0 and DQ1. Supported by some SPI flash devices that support the Extended SPI Protocol and by all SPI flash devices that support the Dual SP (DIO-SPI) Protocol.
2	Read address transferred on DQ0, DQ1, DQ2, and DQ3. Supported by some SPI flash devices that support the Extended SPI Protocol and by all SPI flash devices that support the Quad SP (QIO-SPI) Protocol.

RW

0x0

11:8

wr_instr_resv1_fld

RO

0x0

7:0

wropcode

 Write Opcode

RW

0x2