PIC18F4515T-I/PT【PDF 71/234 页】IC MCU FLASH 24KX16 44TQFP

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Sheet目录3878

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PIC18F2X1X/4X1X

DS39636D-page 164

2009 Microchip Technology Inc.

REGISTER 16-4:

SSPCON1: MSSP CONTROL REGISTER 1 (I2C MODE)

R/W-0

WCOL

SSPOV

SSPEN

CKP

SSPM3

SSPM2

SSPM1

SSPM0

bit 7

bit 0

bit 7

WCOL: Write Collision Detect bit

In Master Transmit mode:

1 = A write to the SSPBUF 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 SSPBUF 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.

bit 6

SSPOV: Receive Overflow Indicator bit

In Receive mode:

1 = A byte is received while the SSPBUF 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.

bit 5

SSPEN: Synchronous Serial Port Enable bit

1 = Enables the serial port and configures the SDA and SCL pins as the serial port pins

0 = Disables serial port and configures these pins as I/O port pins

Note:

When enabled, the SDA and SCL pins must be properly configured as input or

output.

bit 4

CKP: SCK Release Control bit

In Slave mode:

1 = Release clock

0 = Holds clock low (clock stretch), used to ensure data setup time

In Master mode:

Unused in this mode.

bit 3-0 SSPM3:SSPM0: Synchronous Serial Port Mode Select bits

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)

1000 = I2C Master mode, clock = FOSC/(4 * (SSPADD + 1))

0111 = I2C Slave mode, 10-bit address

0110 = I2C Slave mode, 7-bit address

Bit combinations not specifically listed here are either reserved or implemented in SPI mode only.

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

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