PIC12F675T-ESLASHP datasheet(48/136 Pages) MICROCHIP

48 / 136 page

PIC12F629/675

DS41190G-page 48

 2010 Microchip Technology Inc.

7.3

A/D Operation During Sleep

The A/D converter module can operate during Sleep.

This requires the A/D clock source to be set to the

internal RC oscillator. When the RC clock source is

selected, the A/D waits one instruction before starting

the conversion. This allows the SLEEP instruction to be

executed, thus eliminating much of the switching noise

from the conversion. When the conversion is complete,

the GO/DONE bit is cleared, and the result is loaded

into the ADRESH:ADRESL registers. If the A/D

interrupt is enabled, the device awakens from Sleep. If

the A/D interrupt is not enabled, the A/D module is

turned off, although the ADON bit remains set.

When the A/D clock source is something other than

RC, a SLEEP instruction causes the present conversion

to be aborted, and the A/D module is turned off. The

ADON bit remains set.

7.4

Effects of Reset

A device Reset forces all registers to their Reset state.

Thus the A/D module is turned off and any pending

conversion

aborted.

The

ADRESH:ADRESL

registers are unchanged.

TABLE 7-2:

SUMMARY OF A/D REGISTERS

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR,

BOD

Value on

all other

Resets

05h

GPIO

—

GPIO5

GPIO4

GPIO3

GPIO2

GPIO1

GPIO0

--xx xxxx --uu uuuu

0Bh, 8Bh INTCON

GIE

PEIE

T0IE

INTE

GPIE

T0IF

INTF

GPIF

0000 0000 0000 000u

0Ch

PIR1

EEIF

ADIF

—

CMIF

—

TMR1IF

00-- 0--0 00-- 0--0

1Eh

ADRESH Most Significant 8 bits of the Left Shifted A/D result or 2 bits of the Right Shifted Result

xxxx xxxx uuuu uuuu

1Fh

ADCON0

ADFM

VCFG

—

CHS1

CHS0

ADON

00-- 0000 00-- 0000

85h

TRISIO

—

TRISIO5

TRISIO4

TRISIO3 TRISIO2 TRISIO1 TRISIO0 --11 1111 --11 1111

8Ch

PIE1

EEIE

ADIE

—

CMIE

—

TMR1IE

00-- 0--0 00-- 0--0

9Eh

ADRESL Least Significant 2 bits of the Left Shifted A/D Result or 8 bits of the Right Shifted Result

xxxx xxxx uuuu uuuu

9Fh

ANSEL

—

ADCS2

ADCS1

ADCS0

ANS3

ANS2

ANS1

ANS0

-000 1111 -000 1111

Legend: x = unknown, u = unchanged, - = unimplemented read as ‘

0’. Shaded cells are not used for A/D converter module.

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