21.3.4 SPI Buffer Register

Name:	SPIxBUF
Offset:	0x180C, 0x182C, 0x184C, 0x186C

Legend: R = Readable bit; W = Writable bit

Bits 31:0 – SPIxBUF[31:0] SPIx FIFO Data bits

Table 21-4 summarizes the valid data field for possible values of MODE32, MODE16 and WLENGTH[4:0] bits.

Table 21-4. MODE32, MODE16 and WLENGTH[4:0] Data Fields
MODE32	MODE16	WLENGTH[4:0]	COMMUNICATION	Valid Data Field Data
`1`	`X`	`0`	32-bit	SPIxBUF[31:0]
`0`	`1`	`0`	16-bit	SPIxBUF[15:0]
`0`	`0`	`0`	8-bit	SPIxBUF[07:0]
`X`	`X`	16 < N < 31	(N+1)-bit	SPIxBUF[31:(31-N)]
`X`	`X`	8 < N < 15	(N+1)-bit	SPIxBUF[15:(15-N)]
`X`	`X`	1 < N < 7	(N+1)-bit	SPIxBUF[07:(07-N)]