PIC24FJ16MC101_12 Datasheet, PDF (179/350 Pages) Microchip Technology – 16-bit Microcontrollers (up to 32 KB Flash and 2 KB SRAM)

PIC24FJ16MC101/102 AND PIC24FJ32MC101/102/104
REGISTER 17-1: I2CxCON: I2Cx CONTROL REGISTER
R/W-0
I2CEN
bit 15
U-0
R/W-0
R/W-1 HC
R/W-0
—
I2CSIDL SCLREL IPMIEN
R/W-0
A10M
R/W-0
DISSLW
R/W-0
SMEN
bit 8
R/W-0
GCEN
bit 7
R/W-0
STREN
R/W-0
ACKDT
R/W-0 HC R/W-0 HC
ACKEN
RCEN
R/W-0 HC
PEN
R/W-0 HC
RSEN
R/W-0 HC
SEN
bit 0
Legend:
R = Readable bit
-n = Value at POR
U = Unimplemented bit, read as ‘0’
W = Writable bit
HS = Set in hardware
‘1’ = Bit is set
‘0’ = Bit is cleared
HC = Cleared in hardware
x = Bit is unknown
bit 15
bit 14
bit 13
bit 12
bit 11
bit 10
bit 9
bit 8
bit 7
bit 6
I2CEN: I2Cx Enable bit
1 = Enables the I2Cx module and configures the SDAx and SCLx pins as serial port pins
0 = Disables the I2Cx module. All I²C pins are controlled by port functions.
Unimplemented: Read as ‘0’
I2CSIDL: Stop in Idle Mode bit
1 = Discontinue module operation when device enters an Idle mode
0 = Continue module operation in Idle mode
SCLREL: SCLx Release Control bit (when operating as I²C slave)
1 = Release SCLx clock
0 = Hold SCLx clock low (clock stretch)
If STREN = 1:
Bit is R/W (i.e., software can write ‘0’ to initiate stretch and write ‘1’ to release clock). Hardware clear
at beginning of every slave data byte transmission. Hardware clear at end every of slave address byte
reception. Hardware clear at every slave data byte reception.
If STREN = 0:
Bit is R/S (i.e., software can only write ‘1’ to release clock). Hardware clear at beginning of every slave
data byte transmission. Hardware clear at end of every slave address byte reception.
IPMIEN: Intelligent Peripheral Management Interface (IPMI) Enable bit
1 = IPMI mode is enabled; all addresses Acknowledged
0 = IPMI mode disabled
A10M: 10-bit Slave Address bit
1 = I2CxADD is a 10-bit slave address
0 = I2CxADD is a 7-bit slave address
DISSLW: Disable Slew Rate Control bit
1 = Slew rate control disabled
0 = Slew rate control enabled
SMEN: SMBus Input Levels bit
1 = Enable I/O pin thresholds compliant with SMBus specification
0 = Disable SMBus input thresholds
GCEN: General Call Enable bit (when operating as I²C slave)
1 = Enable interrupt when a general call address is received in the I2CxRSR
(module is enabled for reception)
0 = General call address disabled
STREN: SCLx Clock Stretch Enable bit (when operating as I²C slave)
Used in conjunction with SCLREL bit.
1 = Enable software or receive clock stretching
0 = Disable software or receive clock stretching
© 2011-2012 Microchip Technology Inc.
Preliminary
DS39997C-page 179