PIC18F23K22 Datasheet, PDF (256/492 Pages) Microchip Technology – 28/40/44-Pin, Low-Power, High-Performance Microcontrollers with nanoWatt XLP Technology

PIC18(L)F2X/4XK22
REGISTER 15-2: SSPxCON1: SSPx CONTROL REGISTER 1
R/C/HS-0
WCOL
bit 7
R/C/HS-0
SSPxOV
R/W-0
SSPxEN
R/W-0
CKP
R/W-0
R/W-0
R/W-0
SSPxM<3:0>
R/W-0
bit 0
Legend:
R = Readable bit
u = Bit is unchanged
‘1’ = Bit is set
W = Writable bit
x = Bit is unknown
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
-n/n = Value at POR and BOR/Value at all other Resets
HS = Bit is set by hardware
C = User cleared
bit 7
WCOL: Write Collision Detect bit
Master mode:
1 = A write to the SSPxBUF register was attempted while the I²C conditions were not valid for a transmission to
be started
0 = No collision
Slave mode:
1 = The SSPxBUF register is written while it is still transmitting the previous word (must be cleared in software)
0 = No collision
bit 6
SSPxOV: Receive Overflow Indicator bit⁽¹⁾
In SPI 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. In Slave mode, the user must read the SSPxBUF, even
if only transmitting data, to avoid setting overflow. In Master mode, the overflow bit is not set since each new recep-
tion (and transmission) is initiated by writing to the SSPxBUF register (must be cleared in software).
0 = No overflow
In I²C mode:
1 = A byte is received while the SSPxBUF register is still holding the previous byte. SSPxOV is a “don’t care” in
Transmit mode (must be cleared in software).
0 = No overflow
bit 5
SSPxEN: Synchronous Serial Port Enable bit
In both modes, when enabled, these pins must be properly configured as input or output
In SPI mode:
1 = Enables serial port and configures SCKx, SDOx, SDIx and SSx as the source of the serial port pins⁽²⁾
0 = Disables serial port and configures these pins as I/O port pins
In I²C mode:
1 = Enables the serial port and configures the SDAx and SCLx pins as the source of the serial port pins⁽³⁾
0 = Disables serial port and configures these pins as I/O port pins
bit 4
CKP: Clock Polarity Select bit
In SPI mode:
1 = Idle state for clock is a high level
0 = Idle state for clock is a low level
In I²C Slave mode:
SCLx release control
1 = Enable clock
0 = Holds clock low (clock stretch). (Used to ensure data setup time.)
In I²C Master mode:
Unused in this mode
DS41412B-page 256
Preliminary
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