PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 145

• Manufacturer Part Number: PIC18F258
• Description: High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
• Manufacturer: MICROCHIP [Microchip Technology]

REGISTER 17-2:
 2002 Microchip Technology Inc.
bit 7
bit 6
bit 5
bit 4
bit 3-0
SSPCON1: MSSP CONTROL REGISTER1 (SPI MODE)
bit 7
WCOL: Write Collision Detect bit (Transmit mode only)
1 = The SSPBUF register is written while it is still transmitting the previous word
0 = No collision
SSPOV: Receive Overflow Indicator bit
SPI Slave mode:
1 = A new byte is received while the SSPBUF register is still holding the previous data. In case
0 = No overflow
Note:
SSPEN: Synchronous Serial Port Enable bit
1 = Enables serial port and configures SCK, SDO, SDI, and SS as serial port pins
0 = Disables serial port and configures these pins as I/O port pins
Note:
CKP: Clock Polarity Select bit
1 = IDLE state for clock is a high level
0 = IDLE state for clock is a low level
SSPM3:SSPM0: Synchronous Serial Port Mode Select bits
0101 = SPI Slave mode, clock = SCK pin, SS pin control disabled, SS can be used as I/O pin
0100 = SPI Slave mode, clock = SCK pin, SS pin control enabled
0011 = SPI Master mode, clock = TMR2 output/2
0010 = SPI Master mode, clock = F
0001 = SPI Master mode, clock = F
0000 = SPI Master mode, clock = F
Note:
Legend:
R = Readable bit
- n = Value at POR
WCOL
R/W-0
of overflow, the data in SSPSR is lost. Overflow can only occur in Slave mode.The user
must read the SSPBUF, even if only transmitting data, to avoid setting overflow
(must be cleared in software).
(must be cleared in software)
In Master mode, the overflow bit is not set since each new reception (and
transmission) is initiated by writing to the SSPBUF register.
When enabled, these pins must be properly configured as input or output.
Bit combinations not specifically listed here are either reserved, or implemented in
I
2
C mode only.
SSPOV
R/W-0
W = Writable bit
’1’ = Bit is set
SSPEN
R/W-0
Preliminary
OSC
OSC
OSC
R/W-0
CKP
/64
/16
/4
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
SSPM3
R/W-0
SSPM2
R/W-0
PIC18FXX8
x = Bit is unknown
SSPM1
R/W-0
DS41159B-page 143
SSPM0
R/W-0
bit 0