Datasheet

PIC24FV32KA304 FAMILY
DS39995D-page 164  2011-2013 Microchip Technology Inc.
REGISTER 16-1: SPIxSTAT: SPIx STATUS AND CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 R-0, HSC R-0, HSC R-0, HSC
SPIEN
—SPISIDL— — SPIBEC2 SPIBEC1 SPIBEC0
bit 15 bit 8
R-0, HSC R/C-0, HS R/W-0, HSC R/W-0 R/W-0 R/W-0 R-0, HSC R-0, HSC
SRMPT SPIROV SRXMPT SISEL2 SISEL1 SISEL0 SPITBF SPIRBF
bit 7 bit 0
Legend: C = Clearable bit HS = Hardware Settable bit HSC = Hardware Settable/Clearable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 SPIEN: SPIx Enable bit
1 = Enables module and configures SCKx, SDOx, SDIx and SSx
as serial port pins
0 = Disables module
bit 14 Unimplemented: Read as ‘0’
bit 13 SPISIDL: SPIx Stop in Idle Mode bit
1 = Discontinues module operation when device enters Idle mode
0 = Continues module operation in Idle mode
bit 12-11 Unimplemented: Read as ‘0’
bit 10-8 SPIBEC<2:0>: SPIx Buffer Element Count bits (valid in Enhanced Buffer mode)
Master mode:
Number of SPI transfers pending.
Slave mode:
Number of SPI transfers unread.
bit 7 SRMPT: SPIx Shift Register (SPIxSR) Empty bit (valid in Enhanced Buffer mode)
1 = SPIx Shift register is empty and ready to send or receive
0 = SPIx Shift register is not empty
bit 6 SPIROV: SPIx Receive Overflow Flag bit
1 = A new byte/word is completely received and discarded (the user software has not read the previous
data in the SPI1BUF register)
0 = No overflow has occurred
bit 5 SRXMPT: SPIx Receive FIFO Empty bit (valid in Enhanced Buffer mode)
1 = Receive FIFO is empty
0 = Receive FIFO is not empty
bit 4-2 SISEL<2:0>: SPIx Buffer Interrupt Mode bits (valid in Enhanced Buffer mode)
111 = Interrupt when SPIx transmit buffer is full (SPITBF bit is set)
110 = Interrupt when last bit is shifted into SPIxSR; as a result, the TX FIFO is empty
101 = Interrupt when the last bit is shifted out of SPIxSR; now the transmit is complete
100 = Interrupt when one data byte is shifted into the SPIxSR; as a result, the TX FIFO has one open spot
011 = Interrupt when SPIx receive buffer is full (SPIRBF bit is set)
010 = Interrupt when SPIx receive buffer is 3/4 or more full
001 = Interrupt when data is available in receive buffer (SRMPT bit is set)
000 = Interrupt when the last data in the receive buffer is read; as a result, the buffer is empty (SRXMPT
bit is set)