35.6.8 SQI CONFIGURATION REGISTER

Table 35-8. Register Bit Attribute Legend
Symbol	Description	Symbol	Description	Symbol	Description
R	Readable bit	HC	Cleared by Hardware	(Grey cell)	Unimplemented
W	Writable bit	HS	Set by Hardware	X	Bit is unknown at Reset
K	Write to clear	S	Software settable bit	—	—

Name:	CFG
Offset:	0x108
Reset:	0x0000
Property:	-


Bit	31	30	29	28	27	26	25	24
					CSEN[3:0]
Access					R/W	R/W	R/W	R/W
Reset					0	0	0	0


Bit	23	22	21	20	19	18	17	16
	SQIEN		DATAEN[1:0]		CONBUFRST	RXBUFRST	TXBUFRST	RESET
Access	R/W		R/W	R/W	R/W/HC	R/W/HC	R/W/HC	R/W/HC
Reset	0		0	0	0	0	0	0


Bit	15	14	13	12	11	10	9	8
		Reserved[1:0]		BURSTEN	Reserved	HOLD	WP	Reserved[2]
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
	Reserved[1:0]		LSBF	CPOL	CPHA	MODE[2:0]
Access	R/W	R/W	R/W	R/W	R/W	R/W	R/W	R/W
Reset	0	0	0	0	0	0	0	0

Bits 27:24 – CSEN[3:0] Chip Select Output Enable bits <1:0>

Value	Description
1111	Chip Select 3, 2, 1 and 0 are used
1110	Chip Select 3, 2 and 1 are used
1101	Chip Select 3, 2 and 0 are used
1100	Chip Select 3 and 2 are used
1011	Chip Select 3, 1 and 0 are used
1010	Chip Select 3 and 1 are used
1001	Chip Select 3 and 0 are used
1000	Chip Select 3 is used
0111	Chip Select 2, 1 and 0 are used
0110	Chip Select 2 and 1 are used
0101	Chip Select 2 and 0 are used
0100	Chip Select 2 is used
0011	Chip Select 1 and 0 are used
0010	Chip Select 1 is used
0001	Chip Select 0 is used
0000	No chip is selected

Bit 23 – SQIEN SQI Enable bit

Value	Description
1	SQI module is enabled
0	SQI module is disabled

Bits 21:20 – DATAEN[1:0] Data Output Enable bits <1:0>

Value	Description
11	Reserved
10	SQID3-SQID0 outputs are enabled
01	SQID1 and SQID0 data outputs are enabled
00	SQID0 data output is enabled

Bit 19 – CONBUFRST Control Buffer Reset bit

Value	Description
1	A reset pulse is generated clearing the control buffer
0	A reset pulse is not generated

Bit 18 – RXBUFRST Receive Buffer Reset bit

Value	Description
1	A reset pulse is generated clearing the receive buffer
0	A reset pulse is not generated

Bit 17 – TXBUFRST Transmit Buffer Reset bit

Value	Description
1	A reset pulse is generated clearing the transmit buffer
0	A reset pulse is not generated

Bit 16 – RESET Software Reset Select bit

Value	Description
1	A reset pulse is generated
0	A reset pulse is not generated

Bits 14:13 – Reserved[1:0]

Must be programmed as ‘0’

Bit 12 – BURSTEN Burst Configuration bit

Note: This bit must be programmed as'1'.

Value	Description
1	Burst is enabled
0	Burst is not enabled

Bit 11 – Reserved

Must be programmed as ‘0’

Bit 10 – HOLD Hold bit

In Single Lane or Dual Lane mode, this bit is used to drive the SQID3 pin, which can be used for devices with a HOLD input pin. The meaning of the values for this bit will depend on the device to which SQID3 is connected.

Bit 9 – WP Write Protect bit

In Single Lane or Dual Lane mode, this bit is used to drive the SQID2 pin, which can be used with devices with a write-protect pin. The meaning of the values for this bit will depend on the device to which SQID2 is connected.

Bits 8:6 – Reserved[2:0]

Must be programmed as ‘0’

Bit 5 – LSBF Data Format Select bit

Value	Description
1	LSB is sent or received first
0	MSB is sent or received first

Bit 4 – CPOL Clock Polarity Select bit

Value	Description
1	Active-low SQICLK (SQICLK high is the Idle state)
0	Active-high SQICLK (SQICLK low is the Idle state)

Bit 3 – CPHA Clock Phase Select bit

Value	Description
1	SQICLK starts toggling at the start of the first data bit
0	SQICLK starts toggling at the middle of the first data bit

Bits 2:0 – MODE[2:0] Mode Select bits <2:0>

Value	Description
111	Reserved
100	Reserved
011	XIP mode is selected (when this mode is entered, the module behaves as if executing in place (XIP), but uses the register data to control timing)
010	DMA mode is selected
001	CPU mode is selected (the module is controlled by the CPU in PIO mode. This mode is entered when leaving Boot or XIP mode)
000	Reserved