Microchip Technology DV164136 Data Sheet
2007-2012 Microchip Technology Inc.
DS39778E-page 173
PIC18F87J11 FAMILY
REGISTER 12-8:
PMSTATL: PARALLEL PORT STATUS LOW BYTE REGISTER
R-1
R/W-0
U-0
U-0
R-1
R-1
R-1
R-1
OBE
OBUF
—
—
OB3E
OB2E
OB1E
OB0E
bit 7
bit 0
Legend:
R = Readable 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 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 n Status Empty bits
1
= Output buffer is empty (writing data to the buffer will clear this bit)
0
= Output buffer contains data that has not been transmitted