Datasheet

dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04

17.2 I

C Registers

I2CxCON and I2CxSTAT are control and status

registers. The I2CxCON register is readable and

writable. The lower six bits of I2CxSTAT are read-only.

The remaining bits of the I2CxSTAT are read/write:

• I2CxRSR is the shift register used for shifting data

internal to the module and the user application

has no access to it

• I2CxRCV is the receive buffer and the register to

which data bytes are written, or from which data

bytes are read

• I2CxTRN is the transmit register to which bytes

are written during a transmit operation

• The I2CxADD register holds the slave address

• A status bit, ADD10, indicates 10-bit Address

mode

• The I2CxBRG acts as the Baud Rate Generator

(BRG) reload value

In receive operations, I2CxRSR and I2CxRCV together

form a double-buffered receiver. When I2CxRSR

receives a complete byte, it is transferred to I2CxRCV,

and an interrupt pulse is generated.