Microchip Technology dsPIC30F - Page 526

dsPIC30F Family Reference Manual
DS70068C-page 21-12 © 2004 Microchip Technology Inc.
Register 21-2: I2CSTAT: I
2
C Status Register (Continued)
bit 4 P: Stop bit
1 = Indicates that a Stop bit has been detected last
0 = Stop bit was not detected last
Hardware set or clear when Start, Repeated Start or Stop 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 set or clear when Start, Repeated Start or Stop detected.
bit 2 R_W: Read/Write bit Information (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 set or clear after reception of I
2
C device address byte.
bit 1 RBF: Receive Buffer Full Status bit
1 = Receive complete, I2CRCV is full
0 = Receive not complete, I2CRCV is empty
Hardware set when I2CRCV written with received byte.
Hardware clear when software reads I2CRCV.
bit 0 TBF: Transmit Buffer Full Status bit
1 = Transmit in progress, I2CTRN is full
0 = Transmit complete, I2CTRN is empty
Hardware set when software writes I2CTRN.
Hardware clear at completion of data transmission.
Legend:
R = Readable W = Writable C = Clearable bit
HC = Cleared by Hardware HS = Set by Hardware U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set at POR ‘0’ = Bit cleared at POR x = Bit is unknown at POR