Microchip Technology AC244049 Data Sheet
2010-2012 Microchip Technology Inc.
DS41440C-page 125
PIC16(L)F1825/1829
REGISTER 12-3:
PORTA: PORTA REGISTER
U-0
U-0
R/W-x/x
R/W-x/x
R-x/x
R/W-x/x
R/W-x/x
R/W-x/x
—
—
RA5
RA4
RA3
RA2
RA1
RA0
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-0
RA<5:0>: PORTA I/O Value bits
(1)
1 = Port pin is > V
IH
0 = Port pin is < V
IL
Note 1:
Writes to PORTA are actually written to corresponding LATA register. Reads from PORTA register is return
of actual I/O pin values.
of actual I/O pin values.
REGISTER 12-4:
TRISA: PORTA TRI-STATE REGISTER
U-0
U-0
R/W-1/1
R/W-1/1
R-1/1
R/W-1/1
R/W-1/1
R/W-1/1
—
—
TRISA5
TRISA4
TRISA3
TRISA2
TRISA1
TRISA0
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
u = Bit is unchanged
x = Bit is unknown
-n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set
‘0’ = Bit is cleared
bit 7-6
Unimplemented: Read as ‘0’
bit 5-4
TRISA<5:4>: PORTA Tri-State Control bit
1 = PORTA pin configured as an input (tri-stated)
0 = PORTA pin configured as an output
1 = PORTA pin configured as an input (tri-stated)
0 = PORTA pin configured as an output
bit 3
TRISA3: RA3 Port Tri-State Control bit
This bit is always ‘1’ as RA3 is an input only
This bit is always ‘1’ as RA3 is an input only
bit 2-0
TRISA<2:0>: PORTA Tri-State Control bit
1 = PORTA pin configured as an input (tri-stated)
0 = PORTA pin configured as an output
1 = PORTA pin configured as an input (tri-stated)
0 = PORTA pin configured as an output