Microchip Technology MA320001 Data Sheet

© 2011 Microchip Technology Inc.

DS61143H-page 113

The I

2

C module provides complete hardware support

for both Slave and Multi-Master modes of the I

2

C serial

communication standard. 

 illustrates the I

2

C

module block diagram.

The PIC32MX3XX/4XX devices have up to two I

2

C

interface modules, denoted as I2C1 and I2C2. Each
I

2

C module has a 2-pin interface: the SCLx pin is clock

and the SDAx pin is data. 

Each I

2

C module, ‘I2Cx’ (x = 1 or 2), offers the following

key features:

• I

2

C Interface Supporting both Master and Slave 

Operation.

• I

2

C Slave Mode Supports 7 and 10-bit Address.

• I

2

C Master Mode Supports 7 and 10-bit Address.

• I

2

C Port allows Bidirectional Transfers between 

Master and Slaves.

• Serial Clock Synchronization for I

2

C Port can be 

used as a Handshake Mechanism to Suspend 
and Resume Serial Transfer (SCLREL control).

• I

2

C Supports Multi-master Operation; Detects Bus 

Collision and Arbitrates Accordingly.

• Provides Support for Address Bit Masking.

Note 1: This data sheet summarizes the features

of the PIC32MX3XX/4XX family of
devices. It is not intended to be a compre-
hensive reference source. To comple-
ment the information in this data sheet,
refer to Section 24. “Inter-Integrated
Circuit (I

C™)” (DS61116) of the “PIC32

Family Reference Manual”, which is
available from the Microchip web site
(

www.microchip.com/PIC32

).

2: Some registers and associated bits

described in this section may not be
available on all devices. Refer to

 in

this data sheet for device-specific register
and bit information.