Realtek - Register table longan

longan register: SPI_CTRL1

SPI Controller register (1)

default: 0x0034_0000

Name	LSB	Bits	Description
RESERVED	29	3
DATA_WIDTH	20	9	SPI Command read/write data width Note, val + 1, e.g. 0x000 = 1 byte, max is 512 bytes.
ADDR_WIDTH	17	3	External SPI slave address width 0x0: 1 byte 0x1: 2 byte 0x2: 3 byte 0x3: 4 byte 0x4: None 0x5 - 0xf: reserved
SPI_CLK_DIV	14	3	SPI Clock divider @400 MHz System Clock 0x0: /6 0x1: /8 0x2: /10 0x3: /16 0x4: /32 0x5: /200 0x6: /320 0x7: /400 @150 MHz System Clock 0x0: /4 0x1: /6 0x2: /8 0x3: /16 0x4: /32 0x5: /80 0x6: /120 0x7: /150
GPIO_SPI_SEL	13	1	GPIO SPI Select 0x0: GPIO3, GPIO4, GPIO5 are GPIO 0x1: GPIO3 = SCK, GPIO4 = MISO, GPIO5 = MOSI
CSB_OUT_SEL	12	1	Chip select choice Note, depends on GPIO6/GPIO7 setting 0b0: CS#0 0b1: CS#1
GPIO6_CSB1_SEL	11	1	GPIO6 Chip select choice 0x0: GPIO 0x1: CS#1
GPIO7_CSB0_SEL	10	1	GPIO7 Chip select choice 0x0: GPIO 0x1: CS#0
SPI_CMD	2	8	SPI command
SPI_CMD_TYPE	1	1	SPI Read or Write selector 0b0: read 0b1: write
SPI_TRIG	0	1	SPI execute command 0b0: noop 0b1: execute, auto-clears on completion