PIC16F1933-ESLASHP datasheet(99/418 Pages) MICROCHIP

99 / 418 page

Preliminary

DS41364A-page 97

PIC16F193X/LF193X

6.5.1

ANSELD REGISTER

The ANSELD register (Register 6-17) is used to

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

Setting the appropriate ANSELD 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 ANSELD bits has no affect on digital

output functions. A pin with TRIS clear and ANSEL 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.

Note:

The ANSELD register must be initialized

to configure an analog channel as a digital

input. Pins configured as analog inputs will

read ‘0’.

TRISD: PORTD TRI-STATE REGISTER(1)

R/W-1/1

TRISD7

TRISD6

TRISD5

TRISD4

TRISD3

TRISD2

TRISD1

TRISD0

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

TRISD<7:0>: PORTD Tri-State Control bits

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

= PORTD pin configured as an output

Note 1:

TRISD is not implemented on PIC16F1933/1936/1938 devices, read as ‘0’.

PORTD implemented on PIC16F1934/1937/1939/PIC16LF1934/1937/1939 devices only.

ANSELD: PORTD ANALOG SELECT REGISTER(2)

R/W-1/1

ANSD7

ANSD6

ANSD5

ANSD4

ANSD3

ANSD2

ANSD1

ANSD0

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

ANSD<7:0>: Analog Select between Analog or Digital Function on Pins RD<7:0>, 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.

ANSELD register is not implemented on the PIC16F1933/1936/1938. Read as ‘0’.

PORTD implemented on PIC16F1934/1937/1939/PIC16LF1934/1937/1939 devices only.

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