PIC16C712T-04/SO View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C712T-04/SO

8-Bit CMOS Microcontrollers with A/D Converter and Capture/Compare/PWM

Microchip Technology 

PIC16C712/716

8.4 A/D Conversions

Note: The GO/DONE bit should NOT be set in

the same instruction that turns on the A/D.

8.5 Use of the CCP Trigger

An A/D conversion can be started by the “special event

trigger” of the CCP1 module. This requires that the

CCP1M3:CCP1M0 bits (CCP1CON<3:0>) be pro-

grammed as 1011 and that the A/D module is enabled

(ADON bit is set). When the trigger occurs, the

TABLE 8-2 SUMMARY OF A/D REGISTERS

GO/DONE bit will be set, starting the A/D conversion,

and the Timer1 counter will be reset to zero. Timer1 is

reset to automatically repeat the A/D acquisition period

with minimal software overhead (moving the ADRES to

the desired location). The appropriate analog input

channel must be selected and the minimum acquisition

done before the “special event trigger” sets the

GO/DONE bit (starts a conversion).

If the A/D module is not enabled (ADON is cleared),

then the “special event trigger” will be ignored by the

A/D module, but will still reset the Timer1 counter.

Address Name

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR,

BOR

Value on all

other Resets

05h

PORTA

—

—

—(1)

RA4

RA3

RA2

RA1

RA0 --xx xxxx

0Bh,8Bh INTCON GIE PEIE T0IE INTE RBIE

T0IF

INTF RBIF 0000 000x

0Ch

PIR1

—

ADIF

—

—

—

CCP1IF TMR2IF TMR1IF -0-- -000

1Eh

ADRES A/D Result Register

xxxx xxxx

1Fh

ADCON0 ADCS1 ADCS0 CHS2 CHS1 CHS0 GO/DONE —

ADON 0000 00-0

85h

TRISA

—

—

—(1) PORTA Data Direction Register

---1 1111

8Ch

PIE1

—

ADIE

—

—

—

CCP1IE TMR2IE TMR1IE -0-- -000

9Fh

ADCON1 —

—

—

—

—

PCFG2 PCFG1 PCFG0 ---- -000

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

Note 1: Reserved bits; Do Not Use.

--xu uuuu

0000 000u

-0-- -000

uuuu uuuu

0000 00-0

---1 1111

-0-- 0000

---- -000

DS41106A-page 50

Preliminary

© 1999 Microchip Technology Inc.

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