PIC24FJ128GA310 datasheet(236/406 Pages) MICROCHIP

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PIC24FJ128GA310 FAMILY

DS39996F-page 236

 2010-2011 Microchip Technology Inc.

I2CxCON: I2Cx CONTROL REGISTER

R/W-0

U-0

R/W-0

R/W-1, HC

R/W-0

I2CEN

—

I2CSIDL

SCLREL

IPMIEN

A10M

DISSLW

SMEN

bit 15

bit 8

R/W-0

R/W-0, HC

GCEN

STREN

ACKDT

ACKEN

RCEN

PEN

RSEN

SEN

bit 7

bit 0

Legend:

HC = Hardware Clearable bit

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

bit 15

I2CEN:

I2Cx Enable bit

= Enables the I2Cx module and configures the SDAx and SCLx pins as serial port pins

= Disables the I2Cx module; all I2C™ pins are controlled by port functions

bit 14

Unimplemented:

Read as ‘0’

bit 13

I2CSIDL:

Stop in Idle Mode bit

= Discontinues module operation when device enters an Idle mode

= Continues module operation in Idle mode

bit 12

SCLREL:

SCLx Release Control bit (when operating as I2C slave)

= Releases SCLx clock

= Holds SCLx clock low (clock stretch)

If STREN = 1:

Bit is R/W (i.e., software may write ‘0’ to initiate stretch and write ‘1’ to release clock). Hardware is clear

at the beginning of slave transmission. Hardware is clear at the end of slave reception.

If STREN = 0:

Bit is R/S (i.e., software may only write ‘1’ to release clock). Hardware is clear at the beginning of slave

transmission.

bit 11

IPMIEN:

Intelligent Platform Management Interface (IPMI) Enable bit

= IPMI Support mode is enabled; all addresses are Acknowledged

= IPMI mode is disabled

bit 10

A10M:

10-Bit Slave Addressing bit

= I2CxADD is a 10-bit slave address

= I2CxADD is a 7-bit slave address

bit 9

DISSLW:

Disable Slew Rate Control bit

= Slew rate control is disabled

= Slew rate control is enabled

bit 8

SMEN:

SMBus Input Levels bit

= Enables I/O pin thresholds compliant with SMBus specifications

= Disables the SMBus input thresholds

bit 7

GCEN:

General Call Enable bit (when operating as I2C slave)

= Enables interrupt when a general call address is received in the I2CxRSR (module is enabled for

reception)

= General call address is disabled

bit 6

STREN:

SCLx Clock Stretch Enable bit (when operating as I2C slave)

Used in conjunction with the SCLREL bit.

= Enables software or receive clock stretching

= Disables software or receive clock stretching

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