Datasheet

dsPIC33EPXXXGM3XX/6XX/7XX

DS70000689D-page 402  2013-2014 Microchip Technology Inc.

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R-0 R/W-0, HS U-0 U-0 R-0 R-0 R-0 R-0

IBF IBOV

— — IB3F IB2F IB1F IB0F

bit 15 bit 8

R-1 R/W-0, HS U-0 U-0 R-1 R-1 R-1 R-1

OBE OBUF

— — OB3E OB2E OB1E OB0E

bit 7 bit 0

Legend: HS = Hardware Settable bit

R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’

-n = Value at Reset ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown

bit 15 IBF: Input Buffer Full Status bit

1 = All writable Input Buffer registers are full

0 = Some or all of the writable Input Buffer registers are empty

bit 14 IBOV: Input Buffer Overflow Status bit

1 = A write attempt to a full Input Byte register occurred (must be cleared in software)

0 = No overflow occurred

bit 13-12 Unimplemented: Read as ‘0’

bit 11-8 IB3F:IB0F: Input Buffer x Status Full bit

1 = Input Buffer x contains data that has not been read (reading buffer will clear this bit)

0 = Input Buffer x does not contain any unread data

bit 7 OBE: Output Buffer Empty Status bit

1 = All readable Output Buffer registers are empty

0 = Some or all of the readable Output Buffer registers are full

bit 6 OBUF: Output Buffer Underflow Status bit

1 = A read occurred from an empty Output Byte register (must be cleared in software)

0 = No underflow occurred

bit 5-4 Unimplemented: Read as ‘0’

bit 3-0 OB3E:OB0E: Output Buffer x Status Empty bit

1 = Output Buffer x is empty (writing data to the buffer will clear this bit)

0 = Output Buffer x contains data that has not been transmitted

Note 1: This register is not available on 44-pin devices.