Microchip dsPIC30F Series Reference Manual Chapter 35 SPI

About this manual

Chapter 35 of this reference manual describes the Serial Peripheral Interface (SPI) module used for synchronous serial communication with other peripherals or on-chip components. The SPI1 module is compatible with Motorola's SPI and SIOP interfaces and consists of a 16-bit shift register, buffer registers, and control/status registers. This manual is written in Chinese.

What's inside

• Introduction
• SPI Registers (SPI1STAT, SPI1CON1, SPI1CON2)
• Working Modes (8/16 bit, Master/Slave)
• Frame SPI Mode
• Clock Frequency Configuration

Frequently asked questions

What are the four pins used by the SPI1 module?

The four pins are SDI1 (Serial Data Input), SDO1 (Serial Data Output), SCK1 (Shift Clock Input or Output), and SS1 (Low-Active Slave Select or Frame Sync I/O pulse).

Can the SPI1 module operate in 2 or 3 pin modes?

Yes, it can be configured to use 2, 3, or 4 pins. In 3-pin mode, SS1 is not used, and in 2-pin mode, SDO1 and SS1 are not used.

What is the function of the MODE16 bit?

The MODE16 bit allows the module to communicate in either 8-bit or 16-bit mode. Changing this value resets the module.