PIC18F87K22 Datasheet, PDF (281/548 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Enhanced Flash Microcontrollers with 12-Bit A/D and nanoWatt XLP Technology

PIC18F87K22 FAMILY
REGISTER 21-2: SSPxCON1: MSSPx CONTROL REGISTER 1 (SPI MODE)
R/W-0
WCOL
bit 7
R/W-0
SSPOV⁽¹⁾
R/W-0
SSPEN⁽²⁾
R/W-0
CKP
R/W-0
SSPM3⁽³⁾
R/W-0
SSPM2⁽³⁾
R/W-0
SSPM1⁽³⁾
R/W-0
SSPM0⁽³⁾
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6
bit 5
bit 4
bit 3-0
WCOL: Write Collision Detect bit
1 = The SSPxBUF register is written while it is still transmitting the previous word (must be cleared in
software)
0 = No collision
SSPOV: Receive Overflow Indicator bit⁽¹⁾
SPI Slave mode:
1 = A new byte is received while the SSPxBUF register is still holding the previous data. In case of
overflow, the data in SSPxSR is lost. Overflow can only occur in Slave mode. The user must read
the SSPxBUF, even if only transmitting data, to avoid setting overflow (must be cleared in
software).
0 = No overflow
SSPEN: Master Synchronous Serial Port Enable bit⁽²⁾
1 = Enables serial port and configures SCKx, SDOx, SDIx and SSx as serial port pins
0 = Disables serial port and configures these pins as I/O port pins
CKP: Clock Polarity Select bit
1 = Idle state for the clock is a high level
0 = Idle state for the clock is a low level
SSPM<3:0>: Master Synchronous Serial Port Mode Select bits⁽³⁾
1010 = SPI Master mode: clock = FOSC/8
0101 = SPI Slave mode: clock = SCKx pin, SSx pin control disabled, SSx can be used as I/O pin
0100 = SPI Slave mode: clock = SCKx pin, SSx pin control enabled
0011 = SPI Master mode: clock = TMR2 output/2
0010 = SPI Master mode: clock = FOSC/64
0001 = SPI Master mode: clock = FOSC/16
0000 = SPI Master mode: clock = FOSC/4
Note 1:
2:
3:
In Master mode, the overflow bit is not set since each new reception (and transmission) is initiated by
writing to the SSPxBUF register.
When enabled, these pins must be properly configured as inputs or outputs.
Bit combinations not specifically listed here are either reserved or implemented in I²C mode only.
 2010 Microchip Technology Inc.
Preliminary
DS39960B-page 281