PIC12C67X datasheet(52/129 Pages) MICROCHIP

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PIC12C67X

DS30561B-page 52

FIGURE 8-4:

FLOWCHART OF A/D OPERATION

TABLE 8-2:

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

Power-on

Reset

Value on

all other

Resets

0Bh/8Bh

INTCON(1)

GIE

PEIE

T0IE

INTE

GPIE

T0IF

INTF

GPIF

0000 000x

0000 000u

0Ch

PIR1

—ADIF

—

-0-- ----

8Ch

PIE1

—ADIE

—

-0-- ----

1Eh

ADRES

A/D Result Register

xxxx xxxx

uuuu uuuu

1Fh

ADCON0

ADCS1

ADCS0

reserved

CHS1

CHS0

GO/DONE

reserved

ADON

0000 0000

9Fh

ADCON1

—

PCFG2

PCFG1

PCFG0

---- -000

05h

GPIO

SCL(2)

SDA(2)

GP5

GP4

GP3

GP2

GP1

GP0

11xx xxxx

11uu uuuu

85h

TRIS

—

TRIS5

TRIS4

TRIS3

TRIS2

TRIS1

TRIS0

--11 1111

Legend: x = unknown, u = unchanged, - = unimplemented read as '0'. Shaded cells are not used for A/D conversion.

Note 1:

These registers can be addressed from either bank.

2: The SCL (GP7) and SDA (GP6) bits are unimplemented on the PIC12C671/672 and read as ’0’.

Acquire

ADON = 0

ADON = 0?

GO = 0?

A/D Clock

GO = 0

ADIF = 0

Abort Conversion

SLEEP

Power-down A/D

Wait 2 TAD

Wake-up

Yes

Finish Conversion

GO = 0

ADIF = 1

Device in

Yes

Finish Conversion

GO = 0

ADIF = 1

Wait 2 TAD

Stay in Sleep

Selected Channel

= RC?

SLEEP

Yes

Instruction?

Start of A/D

Conversion Delayed

1 Instruction Cycle

From Sleep?

Power-down A/D

Yes

Wait 2 TAD

Finish Conversion

GO = 0

ADIF = 1

SLEEP?

PIC12C67X Datasheet(PDF) 52 Page - Microchip Technology

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