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PIC16(L)F1508/9
DS40001609E-page 110
2011-2015 Microchip Technology Inc.
REGISTER 11-4:
LATA: PORTA DATA LATCH REGISTER
U-0
U-0
R/W-x/u
R/W-x/u
U-0
R/W-x/u
R/W-x/u
R/W-x/u
—
—
LATA5
LATA4
—
LATA2
LATA1
LATA0
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
LATA<5:4>
: RA<5:4> Output Latch Value bits
(1)
bit 3
Unimplemented:
Read as ‘
0
’
bit 2-0
LATA<2:0>
: RA<2:0> Output Latch Value bits
(1)
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 11-5:
ANSELA: PORTA ANALOG SELECT REGISTER
U-0
U-0
U-0
R/W-1/1
U-0
R/W-1/1
R/W-1/1
R/W-1/1
—
—
—
ANSA4
—
ANSA2
ANSA1
ANSA0
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 7-5
Unimplemented:
Read as ‘
0
’
bit 4
ANSA4
: Analog Select between Analog or Digital Function on pins RA4, respectively
1
= Analog input. Pin is assigned as analog input
(1)
. Digital input buffer disabled.
0
= Digital I/O. Pin is assigned to port or digital special function.
bit 3
Unimplemented:
Read as ‘
0
’
bit 2-0
ANSA<2:0>
: Analog Select between Analog or Digital Function on pins RA<2:0>, respectively
1
= Analog input. Pin is assigned as analog input
(1)
. Digital input buffer disabled.
0
= Digital I/O. Pin is assigned to port or digital special function.
Note 1:
When setting a pin to an analog input, the corresponding TRIS bit must be set to Input mode in order to
allow external control of the voltage on the pin.
Содержание PIC12F1501
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