Datasheet

PIC16(L)F1454/5/9
DS41639A-page 132 Preliminary  2012 Microchip Technology Inc.
12.4 Register Definitions: PORTA
REGISTER 12-2: PORTA: PORTA REGISTER
U-0 U-0 R/W-x/x R/W-x/x R-x/x U-0 R-x/x R-x/x
— —RA5RA4RA3—RA1RA0
bit 7 bit 0
Legend:
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 5-3 RA<5:3>: PORTA I/O Value bits
(1)
1 = Port pin is > VIH
0 = Port pin is < VIL
bit 2 Unimplemented: Read as ‘0’
bit 1-0 RA<1:0>: 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 PORTA register is return
of actual I/O pin values.
REGISTER 12-3: TRISA: PORTA TRI-STATE REGISTER
U-0 U-0 R/W-1/1 R/W-1/1 U-1 U-0 U-1 U-1
— — TRISA5 TRISA4 —
(1)
— —
(1)
—
(1)
bit 7 bit 0
Legend:
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
bit 3 Unimplemented: Read as ‘1’
bit 2 Unimplemented: Read as ‘0’
bit 1-0 Unimplemented: Read as ‘1’
Note 1: Unimplemented, read as ‘1’.