PIC16F616-ISLASHML datasheet(126/214 Pages) MICROCHIP

126 / 214 page

PIC16F610/616/16HV610/616

DS41288F-page 126

12.10 In-Circuit Serial Programming™

The PIC16F610/616/16HV610/616 microcontrollers

can be serially programmed while in the end

application circuit. This is simply done with five

connections for:

•clock

•data

• power

• ground

• programming voltage

This allows customers to manufacture boards with

unprogrammed

devices

and

then

program

the

microcontroller just before shipping the product. This

also allows the most recent firmware or a custom

firmware to be programmed.

The device is placed into a Program/Verify mode by

holding the RA0 and RA1 pins low, while raising the

MCLR (VPP) pin from VIL to VIHH. See the Memory

Programming

Specification

(DS41284)

for

information. RA0 becomes the programming data and

RA1 becomes the programming clock. Both RA0 and

RA1 are Schmitt Trigger inputs in Program/Verify

mode.

A typical In-Circuit Serial Programming connection is

shown in Figure 12-10.

FIGURE 12-10:

TYPICAL IN-CIRCUIT

SERIAL

PROGRAMMING™

CONNECTION

12.11 In-Circuit Debugger

Since in-circuit debugging requires access to three pins,

MPLAB® ICD 2 development with an 14-pin device is

not

practical.

special

28-pin

PIC16F610/616/

16HV610/616 ICD device is used with MPLAB ICD 2 to

provide separate clock, data and MCLR pins and frees

all normally available pins to the user.

A special debugging adapter allows the ICD device to

be used in place of a PIC16F610/616/16HV610/616

device. The debugging adapter is the only source of the

ICD device.

When the ICD pin on the PIC16F610/616/16HV610/

616 ICD device is held low, the In-Circuit Debugger

functionality is enabled. This function allows simple

debugging functions when used with MPLAB ICD 2.

When the microcontroller has this feature enabled,

some of the resources are not available for general

use. Table 12-9 shows which features are consumed

by the background debugger.

TABLE 12-9:

DEBUGGER RESOURCES

For more information, see “MPLAB® ICD 2 In-Circuit

Debugger User’s Guide” (DS51331), available on

Microchip’s web site (www.microchip.com).

External

Connector

Signals

To Normal

Connections

To Normal

Connections

PIC12F615/12HV615

VDD

VSS

MCLR/VPP/GP3/RA3

GP1

GP0

+5V

VPP

CLK

Data I/O

* Isolation devices (as required)

PIC12F609/12HV609

Note:

To erase the device VDD must be above

the Bulk Erase VDD minimum given in the

Memory

Programming

Specification

(DS41284)

Resource

Description

I/O pins

ICDCLK, ICDDATA

Stack

1 level

Program Memory

Address 0h must be NOP

700h-7FFh

PIC16F616-I/ML Datasheet(PDF) 126 Page - Microchip Technology

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