Microchip Technology MA330025-1 Data Sheet

 2009-2012 Microchip Technology Inc.

DS70616G-page 345

The dsPIC33EPXXX(GP/MC/MU)806/810/814 and
PIC24EPXXX(GP/GU)810/814 family of devices con-
tain two Inter-Integrated Circuit (I

2

C) modules: I2C1

and I2C2. 

The I

2

C module provides complete hardware support

for both Slave and Multi-Master modes of the I

2

C serial

communication standard, with a 16-bit interface. 
The I

2

C module has a 2-pin interface:

• The SCLx pin is the clock.
• The SDAx pin is the data. 
The I

2

C module offers the following key features:

• I

2

C interface supporting both Master and Slave 

modes of operation.

• I

2

C Slave mode supports 7 and 10-bit addressing.

• I

2

C Master mode supports 7 and 10-bit addressing.

• 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.

• IPMI support
• SMBus support

Note 1: This data sheet summarizes the features

of the dsPIC33EPXXX(GP/MC/MU)806/
810/814 and PIC24EPXXX(GP/GU)810/
814 families of devices. It is not intended
to be a comprehensive reference source.
To complement the information in this
data sheet, refer to Section 19. “Inter-
Integrated Circuit™ (I

(DS70330) of the “dsPIC33E/PIC24E
Family Reference Manual”, which is
available from the Microchip web site
(

www.microchip.com

).

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.