PIC16F684-ESLASHST datasheet(67/164 Pages) MICROCHIP

67 / 164 page

 2004 Microchip Technology Inc.

Preliminary

DS41202C-page 65

PIC16F684

9.1.6

CONVERSION OUTPUT

The A/D conversion can be supplied in two formats: left

or right shifted. The ADFM bit (ADCON0<7>) controls

the output format. Figure 9-3 shows the output formats.

FIGURE 9-3:

10-BIT A/D RESULT FORMAT

ANSEL – ANALOG SELECT REGISTER (ADDRESS: 91h)

ADRESH

ADRESL

(ADFM = 0)MSB

LSB

bit 7bit 0

10-bit A/D Result

Unimplemented: Read as ‘0’

(ADFM = 1)

MSB

LSB

bit 7bit 0

Unimplemented: Read as ‘0’

10-bit A/D Result

R/W-1

ANS7

ANS6

ANS5

ANS4

ANS3

ANS2

ANS1

ANS0

bit 7

bit 0

bit 7-0:

ANS<7:0>: Analog Select bits

Analog select between analog or digital function on pins AN<7:0>, respectively.

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

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

Note 1: Setting a pin to an analog input automatically disables the digital input circuitry,

weak pull-ups, and interrupt-on-change if available. The corresponding TRIS bit

must be set to input mode in order to allow external control of the voltage on the pin.

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

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