Microchip Technology MA330019-2 Data Sheet
© 2007-2012 Microchip Technology Inc.
DS70292G-page 313
dsPIC33FJ32GP302/304, dsPIC33FJ64GPX02/X04, AND dsPIC33FJ128GPX02/X04
REGISTER 26-5:
PMSTAT: PARALLEL PORT STATUS REGISTER
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 Set bit
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
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
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
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 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
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
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
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 bits
1 = A read occurred from an empty output byte register (must be cleared in software)
0 = No underflow occurred
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 is empty (writing data to the buffer will clear this bit)
0 = Output buffer contains data that has not been transmitted
1 = Output buffer is empty (writing data to the buffer will clear this bit)
0 = Output buffer contains data that has not been transmitted