PIC32MX250F128C-I/SO 查看數據表（PDF） - Microchip Technology

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PIC32MX250F128C-I/SO

32-bit Microcontrollers (up to 128 KB Flash and 32 KB SRAM) with Audio and Graphics Interfaces, USB, and Advanced Analog

Microchip Technology 

PIC32MX1XX/2XX

REGISTER 16-1: SPIxCON: SPI CONTROL REGISTER (CONTINUED)

bit 3-2 STXISEL<1:0>: SPI Transmit Buffer Empty Interrupt Mode bits

11 = Interrupt is generated when the buffer is not full (has one or more empty elements)

10 = Interrupt is generated when the buffer is empty by one-half or more

01 = Interrupt is generated when the buffer is completely empty

00 = Interrupt is generated when the last transfer is shifted out of SPISR and transmit operations are

complete

bit 1-0 SRXISEL<1:0>: SPI Receive Buffer Full Interrupt Mode bits

11 = Interrupt is generated when the buffer is full

10 = Interrupt is generated when the buffer is full by one-half or more

01 = Interrupt is generated when the buffer is not empty

00 = Interrupt is generated when the last word in the receive buffer is read (i.e., buffer is empty)

Note 1:

2:

3:

When using the 1:1 PBCLK divisor, the user’s software should not read or write the peripheral’s SFRs in

the SYSCLK cycle immediately following the instruction that clears the module’s ON bit.

This bit can only be written when the ON bit = 0.

This bit is not used in the Framed SPI mode. The user should program this bit to ‘0’ for the Framed SPI

mode (FRMEN = 1).

DS61168C-page 168

Preliminary

© 2011 Microchip Technology Inc.

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