70291E Datasheet, PDF (318/436 Pages) Microchip Technology – High-Performance, 16-bit Digital Signal Controllers

dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04
REGISTER 27-5: PMSTAT: PARALLEL PORT STATUS REGISTER
R-0
IBF
bit 15
R/W-0, HS
U-0
IBOV
—
U-0
R-0
—
IB3F
R-0
IB2F
R-0
IB1F
R-0
IB0F
bit 8
R-1
R/W-0, HS
U-0
OBE
OBUF
—
bit 7
U-0
R-1
R-1
R-1
R-1
—
OB3E
OB2E
OB1E
OB0E
bit 0
Legend:
R = Readable bit
-n = Value at POR
HS = Hardware Set bit
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
bit 14
bit 13-12
bit 11-8
bit 7
bit 6
bit 5-4
bit 3-0
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
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
Unimplemented: Read as ‘0’
IB3F:IB0F Input Buffer x Status Full bits
1 = Input buffer contains data that has not been read (reading buffer will clear this bit)
0 = Input buffer does not contain any unread data
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
OBUF: Output Buffer Underflow Status bits
1 = A read occurred from an empty output byte register (must be cleared in software)
0 = No underflow occurred
Unimplemented: Read as ‘0’
OB3E:OB0E Output Buffer x Status Empty bit
1 = Output buffer is empty (writing data to the buffer will clear this bit)
0 = Output buffer contains data that has not been transmitted
DS70291E-page 318
© 2011 Microchip Technology Inc.