Datasheet

 2009-2013 Microchip Technology Inc. DS60001156H-page 213
PIC32MX5XX/6XX/7XX
bit 16 ENHBUF: Enhanced Buffer Enable bit
(2)
1 = Enhanced Buffer mode is enabled
0 = Enhanced Buffer mode is disabled
bit 15 ON: SPI Peripheral On bit
(1)
1 = SPI Peripheral is enabled
0 = SPI Peripheral is disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 SIDL: Stop in Idle Mode bit
1 = Discontinue operation when CPU enters in Idle mode
0 = Continue operation in Idle mode
bit 12 DISSDO: Disable SDOx pin bit
1 = SDOx pin is not used by the module (pin is controlled by associated PORT register)
0 = SDOx pin is controlled by the module
bit 11-10 MODE<32,16>: 32/16-Bit Communication Select bits
MODE32
MODE16 Communication
1x32-bit
0116-bit
008-bit
bit 9 SMP: SPI Data Input Sample Phase bit
Master mode (MSTEN =
1):
1 = Input data sampled at end of data output time
0 = Input data sampled at middle of data output time
Slave mode (MSTEN =
0):
SMP value is ignored when SPI is used in Slave mode. The module always uses SMP = 0.
bit 8 CKE: SPI Clock Edge Select bit
(3)
1 = Serial output data changes on transition from active clock state to Idle clock state (see CKP bit)
0 = Serial output data changes on transition from Idle clock state to active clock state (see CKP bit)
bit 7 SSEN: Slave Select Enable (Slave mode) bit
1 = SSx
pin used for Slave mode
0 = SSx
pin not used for Slave mode (pin is controlled by port function)
bit 6 CKP: Clock Polarity Select bit
1 = Idle state for clock is a high level; active state is a low level
0 = Idle state for clock is a low level; active state is a high level
bit 5 MSTEN: Master Mode Enable bit
1 = Master mode
0 =Slave mode
bit 4 Unimplemented: Read as ‘0’
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)
REGISTER 17-1: SPIxCON: SPI CONTROL REGISTER (CONTINUED)
Note 1: 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.
2: This bit can only be written when the ON bit = 0.
3: 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).