C8051F331 View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

C8051F331

Mixed-Signal ISP Flash MCU

Silicon Laboratories 

C8051F330/1/2/3/4/5

SCK

(CKPOL=0, CKPHA=0)

SCK

(CKPOL=1, CKPHA=0)

MOSI

MSB

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

MISO

MSB

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

NSS (4-Wire Mode)

Figure 17.6. Slave Mode Data/Clock Timing (CKPHA = 0)

SCK

(CKPOL=0, CKPHA=1)

SCK

(CKPOL=1, CKPHA=1)

MOSI

MSB

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

MISO

MSB

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

NSS (4-Wire Mode)

Figure 17.7. Slave Mode Data/Clock Timing (CKPHA = 1)

17.6. SPI Special Function Registers

SPI0 is accessed and controlled through four special function registers in the system controller: SPI0CN

Control Register, SPI0DAT Data Register, SPI0CFG Configuration Register, and SPI0CKR Clock Rate

Register. The four special function registers related to the operation of the SPI0 Bus are described in the

following figures.

Rev. 1.7

169

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