Datasheet

PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family
DS60001320B-page 360 Preliminary  2015 Microchip Technology Inc.
bit 12 SCLREL: SCLx Release Control bit (when operating as I
2
C 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 slave transmission. Hardware clear at end of slave reception.
If STREN =
0:
Bit is R/S (i.e., software can only write ‘1’ to release clock). Hardware clear at beginning of slave
transmission.
bit 11 STRICT: Strict I
2
C Reserved Address Rule Enable bit
1 = Strict reserved addressing is enforced. Device does not respond to reserved address space or generate
addresses in reserved address space.
0 = Strict I
2
C Reserved Address Rule not enabled
bit 10 A10M: 10-bit Slave Address bit
1 = I2CxADD is a 10-bit slave address
0 = I2CxADD is a 7-bit slave address
bit 9 DISSLW: Disable Slew Rate Control bit
1 = Slew rate control disabled
0 = Slew rate control enabled
bit 8 SMEN: SMBus Input Levels bit
1 = Enable I/O pin thresholds compliant with SMBus specification
0 = Disable SMBus input thresholds
bit 7 GCEN: General Call Enable bit (when operating as I
2
C slave)
1 = Enable interrupt when a general call address is received in the I2CxRSR
(module is enabled for reception)
0 = General call address disabled
bit 6 STREN: SCLx Clock Stretch Enable bit (when operating as I
2
C slave)
Used in conjunction with SCLREL bit.
1 = Enable software or receive clock stretching
0 = Disable software or receive clock stretching
bit 5 ACKDT: Acknowledge Data bit (when operating as I
2
C master, applicable during master receive)
Value that is transmitted when the software initiates an Acknowledge sequence.
1 = Send NACK during Acknowledge
0 = Send ACK during Acknowledge
bit 4 ACKEN: Acknowledge Sequence Enable bit 
(when operating as I
2
C master, applicable during master receive)
1 = Initiate Acknowledge sequence on SDAx and SCLx pins and transmit ACKDT data bit. 
Hardware clear at end of master Acknowledge sequence.
0 = Acknowledge sequence not in progress
bit 3 RCEN: Receive Enable bit (when operating as I
2
C master)
1 = Enables Receive mode for I
2
C. Hardware clear at end of eighth bit of master receive data byte.
0 = Receive sequence not in progress
bit 2 PEN: Stop Condition Enable bit (when operating as I
2
C master)
1 = Initiate Stop condition on SDAx and SCLx pins. Hardware clear at end of master Stop sequence.
0 = Stop condition not in progress
bit 1 RSEN: Repeated Start Condition Enable bit (when operating as I
2
C master)
1 = Initiate Repeated Start condition on SDAx and SCLx pins. Hardware clear at end of 
master Repeated Start sequence.
0 = Repeated Start condition not in progress
bit 0 SEN: Start Condition Enable bit (when operating as I
2
C master)
1 = Initiate Start condition on SDAx and SCLx pins. Hardware clear at end of master Start sequence.
0 = Start condition not in progress
REGISTER 21-1: I2CXCON: I
2
C CONTROL REGISTER (CONTINUED)