PIC16F684 Registers

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Revision as of 17:52, 10 July 2006

This page is a more detailed overview of the registers. It includes the most commonly used registers. All remaining information can be found on the Microchip website.

Contents 1 Memory Map 1.1 Registers in Memory Bank 0 1.2 Registers in Memory Bank 1 2 Register Descriptions 2.1 Configuration 2.1.1 STATUS 2.1.2 OPTION 2.1.3 INTCON 2.1.4 PIE1 2.2 I/O 2.2.1 PORTA 2.2.2 TRISA 2.2.3 ANSEL 2.2.4 IOCA 2.2.5 PORTC 2.2.6 TRISC 2.3 Timers 2.3.1 T2CON 2.4 A/D Configuration and Usage 2.4.1 ADCON1 2.4.2 ADCON0 2.4.3 ADRESH 2.4.4 ADRESL

Memory Map

These images show the memory map of the PIC16F684. Use these for a quick reference for register addresses and initial values.

Registers in Memory Bank 0

Registers in Memory Bank 1

Register Descriptions

Configuration

STATUS

OPTION

INTCON

PIE1

The PIE1 is used to enable/disable interrupts.

I/O

PORTA

TRISA

ANSEL

The ANSEL register determines whether a pin, AN<7:0>, is an analog input or not.

IOCA

The IOCA register determines whether or not an interrupt is generated when a digital pin on PORTA, RA<5:0>, experiences a change in value.

PORTC

TRISC

Timers

T2CON

T2CON sets up Timer2, which is used for PWM timing.

A/D Configuration and Usage

When configuring and using the ADC the following functions must be considered:

• Port configuration (ANSEL)
• Channel selection (ADCON0)
• ADC voltage reference selection (ADCON0)
• ADC conversion clock source (ADCON1)
• Interrupt control (INTCON)
• Results formatting (ADCON0)

ADCON1

ADCON0

ADRESH

ADRESH contains the highest significant digits of the A/D conversion. The values contained in this register depend on whether you select "Right Justified" (ADFM=1) or "Left Justified" (ADFM=0) results.

Right Justified (ADFM=1):

Left Justified (ADMF=0):

ADRESL

ADRESL contains the lowest significant digits of the A/D conversion. The values contained in this register depend on whether you select "Right Justified" (ADFM=1) or "Left Justified" (ADFM=0) results.

Right Justified (ADFM=1):

Left Justified (ADMF=0):