Datasheet

 2013-2015 Microchip Technology Inc. DS40001723D-page 113
PIC12(L)F1571/2
11.4 Register Definitions: PORTA
REGISTER 11-2: 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
— —RA<5:0>
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit
u = Bit is unchanged x = Bit is unknown U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set ‘0’ = Bit is cleared -n/n = Value at POR and BOR/Value at all other Resets
bit 7-6 Unimplemented: Read as ‘0’
bit 5-0 RA<5:0>: PORTA I/O Value bits
(1)
1 = Port pin is > VIH
0 = Port pin is < VIL
Note 1: Writes to PORTA are actually written to corresponding LATA register. Reads from the PORTA register are
the return of actual I/O pin values.
REGISTER 11-3: TRISA: PORTA TRI-STATE REGISTER
U-0 U-0 R/W-1/1 R/W-1/1 U-1 R/W-1/1 R/W-1/1 R/W-1/1
— — TRISA<5:4> —
(1)
TRISA<2:0>
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit
u = Bit is unchanged x = Bit is unknown U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set ‘0’ = Bit is cleared -n/n = Value at POR and BOR/Value at all other Resets
bit 7-6 Unimplemented: Read as ‘0’
bit 5-4 TRISA<5:4>: PORTA Tri-State Control bits
1 = PORTA pin configured as an input (tri-stated)
0 = PORTA pin configured as an output
bit 3 Unimplemented: Read as ‘1’
(1)
bit 2-0 TRISA<2:0>: PORTA Tri-State Control bits
1 = PORTA pin configured as an input (tri-stated)
0 = PORTA pin configured as an output
Note 1: Unimplemented, read as ‘1’.