PIC16F1933-ESLASHP datasheet(93/418 Pages) MICROCHIP

93 / 418 page

Preliminary

DS41364A-page 91

PIC16F193X/LF193X

6.3.3

ANSELB REGISTER

The ANSELB register (Register 6-10) is used to

configure the Input mode of an I/O pin to analog.

Setting the appropriate ANSELB bit high will cause all

digital reads on the pin to be read as ‘0’ and allow

analog functions on the pin to operate correctly.

The state of the ANSELB bits has no affect on digital

output functions. A pin with TRIS clear and ANSELB set

will still operate as a digital output, but the Input mode

will be analog. This can cause unexpected behavior

when executing read-modify-write instructions on the

affected port.

TRISB: PORTB TRI-STATE REGISTER

R/W-1/1

TRISB7

TRISB6

TRISB5

TRISB4

TRISB3

TRISB2

TRISB1

TRISB0

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 7-0

TRISB<7:0>: PORTB Tri-State Control bit

= PORTB pin configured as an input (tri-stated)

= PORTB pin configured as an output

ANSELB: PORTB ANALOG SELECT REGISTER

U-0

R/W-1/1

—

ANSB5

ANSB4

ANSB3

ANSB2

ANSB1

ANSB0

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 5-0

ANSB<5:0>: Analog Select between Analog or Digital Function on Pins RB<5:0>, respectively

= Digital I/O. Pin is assigned to port or digital special function.

= Analog input. Pin is assigned as analog input(1). Digital input buffer disabled.

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.

PIC16F1933-E/P Datasheet(PDF) 93 Page - Microchip Technology

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