PIC18F44J10-ESLASHML datasheet(134/358 Pages) MICROCHIP

134 / 358 page

PIC18F45J10 FAMILY

DS39682C-page 132

Preliminary

In addition to the expanded range of modes available

through

the CCP1CON

and

ECCP1AS

associated with Enhanced PWM operation and

auto-shutdown features. It is:

• ECCP1DEL (Dead-Band Delay)

14.1

ECCP Outputs and Configuration

The Enhanced CCP module may have up to four PWM

outputs, depending on the selected operating mode.

These outputs, designated P1A through P1D, are

multiplexed with I/O pins on PORTC and PORTD. The

outputs that are active depend on the ECCP operating

mode selected. The pin assignments are summarized

in Table 14-1.

To configure the I/O pins as PWM outputs, the proper

PWM

mode

must

selected

setting

the

P1M1:P1M0

and

CCP1M3:CCP1M0

bits.

The

appropriate TRISC and TRISD direction bits for the port

pins must also be set as outputs.

14.1.1

ECCP MODULES AND TIMER

RESOURCES

Like the standard CCP modules, the ECCP module can

utilize Timers 1 or 2, depending on the mode selected.

Timer1 is available for modules in Capture or Compare

modes, while Timer2 is available for modules in PWM

mode.

Interactions

between

the

standard

and

Enhanced CCP modules are identical to those

described for standard CCP modules. Additional

details

timer

resources

are

provided

Section 13.1.1

“CCP

Modules

and

Timer

Resources”.

14.2

Capture and Compare Modes

Except for the operation of the Special Event Trigger

discussed below, the Capture and Compare modes of

the ECCP module are identical in operation to that of

CCP2. These are discussed in detail in Section 13.2

“Capture

Mode”

and

Section 13.3

“Compare

Mode”. No changes are required when moving

between 28-pin and 40/44-pin devices.

14.2.1

SPECIAL EVENT TRIGGER

The Special Event Trigger output of ECCP1 resets the

TMR1 register pair. This allows the CCPR1 register to

effectively be a 16-bit programmable period register for

Timer1.

14.3

Standard PWM Mode

When configured in Single Output mode, the ECCP

module functions identically to the standard CCP

module in PWM mode, as described in Section 13.4

“PWM Mode”. This is also sometimes referred to as

“Compatible CCP” mode, as in Table 14-1.

TABLE 14-1:

PIN ASSIGNMENTS FOR VARIOUS ECCP1 MODES

Note:

When setting up single output PWM

operations, users are free to use either of

the processes described in Section 13.4.4

“Setup

for

PWM

Operation”

Section 14.4.9 “Setup for PWM Opera-

tion”. The latter is more generic and will

work for either single or multi-output PWM.

ECCP Mode

CCP1CON

Configuration

RC2

RD5

RD6

RD7

All 40/44-pin Devices:

Compatible CCP

00xx 11xx

CCP1

RD5/PSP5

RD6/PSP6

RD7/PSP7

Dual PWM

10xx 11xx

P1A

P1B

RD6/PSP6

RD7/PSP7

Quad PWM

x1xx 11xx

P1A

P1B

P1C

P1D

Legend: x = Don’t care. Shaded cells indicate pin assignments not used by ECCP1 in a given mode.

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