35.7.12 Instruction Frame


Bit	31	30	29	28	27	26	25	24

Access
Reset


Bit	23	22	21	20	19	18	17	16
				DUMMYLEN[4:0]
Access				R/W	R/W	R/W	R/W	R/W
Reset				0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
	DDREN	CRMODE	TFRTYPE[1:0]			ADDRLEN	OPTCODELEN[1:0]
Access	R/W	R/W	R/W	R/W		R/W	R/W	R/W
Reset	0	0	0	0		0	0	0


Bit	7	6	5	4	3	2	1	0
	DATAEN	OPTCODEEN	ADDREN	INSTREN		WIDTH[2:0]
Access	R/W	R/W	R/W	R/W		R/W	R/W	R/W
Reset	0	0	0	0		0	0	0

Bits 20:16 – DUMMYLEN[4:0] Dummy Cycles Length

The DUMMYLEN field defines the number of dummy cycles required by the serial Flash memory before data transfer.

Bit 15 – DDREN Double Data Rate Enable

Note: Double Data Rate operating is only supported in Read.

Value	Description
0	Double Data Rate operating mode is disabled.
1	Double Data Rate operating mode is enabled.

Bit 14 – CRMODE Continuous Read Mode

This bit defines if the Continuous Read Mode is enabled or disabled.

Value	Description
0	Continuous Read Mode is disabled.
1	Continuous Read Mode is enabled.

Bits 13:12 – TFRTYPE[1:0] Data Transfer Type

These bits define the data type transfer.

Value	Name	Description
0x0	READ	Read transfer from the serial memory.Scrambling is not performed.Read at random location (fetch) in the serial flash memory is not possible.
0x1	READMEMORY	Read data transfer from the serial memory.If enabled, scrambling is performed.Read at random location (fetch) in the serial flash memory is possible.
0x2	WRITE	Write transfer into the serial memory.Scrambling is not performed.
0x3	WRITEMEMORY	Write data transfer into the serial memory. If enabled, scrambling is performed.

Bit 10 – ADDRLEN Address Length

The ADDRLEN bit determines the length of the address.

Value	Name	Description
0x0	24BITS	24-bits address length
0x1	32BITS	32-bits address length

Bits 9:8 – OPTCODELEN[1:0] Option Code Length

The OPTCODELEN field determines the length of the option code. The value written in OPTCODELEN must be coherent with value written in the field WIDTH. For example: OPTCODELEN=0 (1-bit option code) is not coherent with WIDTH=6 (option code sent with QuadSPI protocol, thus the minimum length of the option code is 4-bit).

Value	Name	Description
0x0	1BIT	1-bit length option code
0x1	2BITS	2-bits length option code
0x2	4BITS	4-bits length option code
0x3	8BITS	8-bits length option code

Bit 7 – DATAEN Data Enable

Value	Description
0	No data is sent/received to/from the serial flash memory.
1	Data is sent/received to/from the serial flash memory.

Bit 6 – OPTCODEEN Option Enable

Value	Description
0	The option is not sent to the serial flash memory
1	The option is sent to the serial flash memory.

Bit 5 – ADDREN Address Enable

Value	Description
0	The transfer address is not sent to the serial flash memory.
1	The transfer address is sent to the serial flash memory.

Bit 4 – INSTREN Instruction Enable

Value	Description
0	The instruction is not sent to the serial flash memory.
1	The instruction is sent to the serial flash memory.

Bits 2:0 – WIDTH[2:0] Instruction Code, Address, Option Code and Data Width

This field defines the width of the instruction code, the address, the option and the data.

Value	Name	Description
0x0	SINGLE_BIT_SPI	Instruction: Single-bit SPI / Address-Option: Single-bit SPI / Data: Single-bit SPI
0x1	DUAL_OUTPUT	Instruction: Single-bit SPI / Address-Option: Single-bit SPI / Data: Dual SPI
0x2	QUAD_OUTPUT	Instruction: Single-bit SPI / Address-Option: Single-bit SPI / Data: Quad SPI
0x3	DUAL_IO	Instruction: Single-bit SPI / Address-Option: Dual SPI / Data: Dual SPI
0x4	QUAD_IO	Instruction: Single-bit SPI / Address-Option: Quad SPI / Data: Quad SPI
0x5	DUAL_CMD	Instruction: Dual SPI / Address-Option: Dual SPI / Data: Dual SPI
0x6	QUAD_CMD	Instruction: Quad SPI / Address-Option: Quad SPI / Data: Quad SPI
0x7		Reserved