PIC18F87K22 Datasheet, PDF (291/548 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 21-4: SSPxCON1: MSSPx CONTROL REGISTER 1 (I²C™ MODE)
R/W-0
WCOL
bit 7
R/W-0
SSPOV
R/W-0
SSPEN⁽¹⁾
R/W-0
CKP
R/W-0
SSPM3⁽²⁾
R/W-0
SSPM2⁽²⁾
R/W-0
SSPM1⁽²⁾
R/W-0
SSPM0⁽²⁾
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
In Master Transmit mode:
1 = A write to the SSPxBUF register was attempted while the I²C conditions were not valid for a
transmission to be started (must be cleared in software)
0 = No collision
In Slave Transmit mode:
1 = The SSPxBUF register is written while it is still transmitting the previous word (must be cleared in
software)
0 = No collision
In Receive mode (Master or Slave modes):
This is a “don’t care” bit.
SSPOV: Receive Overflow Indicator bit
In Receive mode:
1 = A byte is received while the SSPxBUF register is still holding the previous byte (must be cleared in
software)
0 = No overflow
In Transmit mode:
This is a “don’t care” bit in Transmit mode.
SSPEN: Master Synchronous Serial Port Enable bit⁽¹⁾
1 = Enables the serial port and configures the SDAx and SCLx pins as the serial port pins
0 = Disables serial port and configures these pins as I/O port pins
CKP: SCKx Release Control bit
In Slave mode:
1 = Releases clock
0 = Holds clock low (clock stretch), used to ensure data setup time
In Master mode:
Unused in this mode.
SSPM<3:0>: Master Synchronous Serial Port Mode Select bits⁽²⁾
1111 = I²C Slave mode: 10-bit address with Start and Stop bit interrupts enabled
1110 = I²C Slave mode: 7-bit address with Start and Stop bit interrupts enabled
1011 = I²C Firmware Controlled Master mode (slave Idle)
1001 = Load SSPMSK register at SSPxADD SFR address^(3,4)
1000 = I²C Master mode: clock = FOSC/(4 * (SSPxADD + 1))
0111 = I²C Slave mode: 10-bit address
0110 = I²C Slave mode: 7-bit address
Note 1:
2:
3:
4:
When enabled, the SDAx and SCLx pins must be configured as inputs.
Bit combinations not specifically listed here are either reserved or implemented in SPI mode only.
When SSPM<3:0> = 1001, any reads or writes to the SSPxADD SFR address actually accesses the
SSPxMSK register.
This mode is only available when 7-Bit Address Masking mode is selected (MSSPMSK Configuration bit
is ‘1’).
 2010 Microchip Technology Inc.
Preliminary
DS39960B-page 291