Datasheet

 2010-2013 Microchip Technology Inc. DS39881E-page 157
PIC24FJ64GA004 FAMILY
bit 5 D/A: Data/Address bit (when operating as I
2
C slave)
1 = Indicates that the last byte received was data
0 = Indicates that the last byte received was a device address
Hardware is clear at a device address match. Hardware is set by a write to I2CxTRN or by reception of
a slave byte.
bit 4 P: Stop bit
1 = Indicates that a Stop bit has been detected last
0 = Stop bit was not detected last
Hardware is set or clear when Start, Repeated Start or Stop is detected.
bit 3 S: Start bit
1 = Indicates that a Start (or Repeated Start) bit has been detected last
0 = Start bit was not detected last
Hardware is set or clear when Start, Repeated Start or Stop is detected.
bit 2 R/W
: Read/Write Information bit (when operating as I
2
C slave)
1 = Read – Indicates data transfer is output from slave
0 = Write – Indicates data transfer is input to slave
Hardware is set or clear after reception of an I
2
C device address byte.
bit 1 RBF: Receive Buffer Full Status bit
1 = Receive is complete, I2CxRCV is full
0 = Receive is not complete, I2CxRCV is empty
Hardware is set when I2CxRCV is written with received byte. Hardware is clear when software reads
I2CxRCV.
bit 0 TBF: Transmit Buffer Full Status bit
1 = Transmit is in progress, I2CxTRN is full
0 = Transmit is complete, I2CxTRN is empty
Hardware is set when software writes I2CxTRN. Hardware is clear at completion of data transmission.
REGISTER 16-2: I2CxSTAT: I2Cx STATUS REGISTER (CONTINUED)
Note 1: In both Master and Slave modes, the ACKSTAT bit is only updated when transmitting data resulting in the
reception of an ACK or NACK from another device. Do not check the state of ACKSTAT when receiving
data, either as a slave or a master. Reading ACKSTAT after receiving address or data bytes returns an
invalid result.
REGISTER 16-3: I2CxMSK: I2Cx SLAVE MODE ADDRESS MASK REGISTER
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
— — — — — — AMSK9 AMSK8
bit 15 bit 8
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
AMSK7 AMSK6 AMSK5 AMSK4 AMSK3 AMSK2 AMSK1 AMSK0
bit 7 bit 0
Legend:
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 15-10 Unimplemented: Read as ‘0’
bit 9-0 AMSK<9:0>: Mask for Address Bit x Select bits
1 = Enables masking for bit x of incoming message address; bit match is not required in this position
0 = Disables masking for bit x; bit match is required in this position