Microchip Technology AC244045 Data Sheet
PIC16(L)F1825/1829
DS41440C-page 132
2010-2012 Microchip Technology Inc.
REGISTER 12-12: ANSELB: PORTB ANALOG SELECT REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
U-0
U-0
U-0
U-0
ANSB7
ANSB6
ANSB5
ANSB4
—
—
—
—
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 7-4
ANSB<7:4>: Analog Select between Analog or Digital Function on pins RB<7:4>, respectively
0 = Digital I/O. Pin is assigned to port or digital special function.
1 = Analog input. Pin is assigned as analog input
0 = Digital I/O. Pin is assigned to port or digital special function.
1 = Analog input. Pin is assigned as analog input
(1)
. Digital input buffer disabled.
bit 3-0
Unimplemented: Read as ‘0’
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.
control of the voltage on the pin.
REGISTER 12-13: WPUB: WEAK PULL-UP PORTB REGISTER
R/W-1/1
R/W-1/1
R/W-1/1
R/W-1/1
U-0
U-0
U-0
U-0
WPUB7
WPUB6
WPUB5
WPUB4
—
—
—
—
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 7-4
WPUB<7:4>: Weak Pull-up Register bits
1 = Pull-up enabled
0 = Pull-up disabled
1 = Pull-up enabled
0 = Pull-up disabled
bit 3-0
Unimplemented: Read as ‘0’
Note 1:
Global WPUEN bit of the OPTION_REG register must be cleared for individual pull-ups to be enabled.
2:
The weak pull-up device is automatically disabled if the pin is in configured as an output.
REGISTER 12-14: INLVLB: PORTB INPUT LEVEL CONTROL REGISTER
R/W-0/0
R/W-0/0
R/W-0/0
R/W-0/0
U-0
U-0
U-0
U-0
INLVLB7
INLVLB6
INLVLB5
INLVLB4
—
—
—
—
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 7-4
INLVLB<7:4>: PORTB Input Level Select bits
For RB<7:4> pins, respectively
1 = ST input used for PORT reads and interrupt-on-change
0 = TTL input used for PORT reads and interrupt-on-change
For RB<7:4> pins, respectively
1 = ST input used for PORT reads and interrupt-on-change
0 = TTL input used for PORT reads and interrupt-on-change
bit 7-6
Unimplemented: Read as ‘0
’