PIC16C62B-04 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C62B-04

28-Pin 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC16C62B/72A

9.4 A/D Conversions

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

the same instruction that turns on the A/D.

9.5 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 be enabled

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

TABLE 9-2 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. The appropriate ana-

log input channel must be selected and the minimum

acquisition time must pass 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

0Bh,8Bh

0Ch

8Ch

1Eh

1Fh

9Fh

INTCON

PIR1

PIE1

ADRES

ADCON0

ADCON1

GIE PEIE T0IE

—

ADIF

—

—

ADIE

—

A/D Result Register

ADCS1 ADCS0 CHS2

—

—

—

INTE

—

—

CHS1

—

RBIE

T0IF

INTF RBIF 0000 000x 0000 000u

SSPIF CCP1IF TMR2IF TMR1IF -0-- 0000 -0-- 0000

SSPIE CCP1IE TMR2IE TMR1IE -0-- 0000 -0-- 0000

xxxx xxxx uuuu uuuu

CHS0 GO/DONE —

ADON 0000 00-0 0000 00-0

—

PCFG2 PCFG1 PCFG0 ---- -000 ---- -000

05h

PORTA

—

—

RA5 RA4 RA3

RA2

RA1

RA0 --0x 0000 --0u 0000

85h

TRISA

—

— PORTA Data Direction Register

--11 1111 --11 1111

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

DS35008B-page 54

Preliminary

© 1999 Microchip Technology Inc.

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