presto_en.pdf - 第18页

Page 18 2) The whole device must be erased before programming if code/main memory protection (CP) or data memory protect ion (CPD) is act ive. 3) Some PIC devices cannot be erased with CP o r CPD active being powered by …

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AVR

AVR TPI

8051

JTAG

RESET

USR

VCC

VDD

GND

MOSI

TPIDATA

MOSI

TDI

SCK

TPICLK

SCK

TCK

MISO

TDO

TMS

Table3: Connection list No.1

PIC

MSP430

SBW

TI CCxxxx

MCLR

TEST

RESET

VDD

VCC

VDD

VSS

GND

PGD

TDI

SWBTDIO

Debug data

PGC

TCK

SWBTCK

Debug clock

TDO

LVP

TMS

Table4: Connection list No.2

PSoC

SPI

Microwire

XRST

VDD

VSS

GND

ISSP-data

SDA

ISSP-SCLK

SCL

SCK

CLK

ORG(PRE)

Table5: Connection list No.3

2.6.4 Connection Examples

The following text presents examples of connections

between PRESTO and the device being programmed. We

use a notation according to the manufacturer datasheet

of each particular device.

PIC Microcontrollers

Fig.6: PIC microcontroller

1) Not all PIC microcontrollers have the PGM pin. The

PGM pin can be connected to programmer’s L pin, to

VSS via a pull-down resistor (for HVP programming)

or to VDD via a pull-up resistor (for LVP

programming).

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2) The whole device must be erased before

programming if code/main memory protection (CP) or

data memory protection (CPD) is active.

3) Some PIC devices cannot be erased with CP or CPD

active being powered by voltage less than 5V.

4) If a microcontroller has more than one power-supply

VDD or VSS pin, all of them must be connected

including the AVDD and AVSS pins.

5) PIC microcontrollers which require 3V or lower power

supply must be fed from external power supply

because PRESTO can only provide 5V voltage.

6) Some PIC microcontrollers require voltage less than

13V on the MCLR pin while the programmer can only

set 13V voltage level on VPP. If such device has been

selected in UP, a warning message is displayed. It is

recommended to limit voltage on the MCLR pin by an

external circuit (a potential divider or a Zener diode

and a resistor).

VPP

Resistor

9V

390Ω

11V

200Ω

Table6: Recommended resistors values with Zener diode (the

value also depends on the rest circuit)

7) If the LVP mode is used, it is recommended to check

whether the LVP fuse is still set after erasing the part.

8) Programming of PIC32 devices is supported by

means of the ICSP interface only with external 3V

power supply.

9) Devices with an ICPORT fuse must have the

dedicated ICSP port off for LVP programming.

10) PIC24 and dsPIC33 devices may be programmed

using PE (Programming Executive) or using the

standard method. Programming by means of PE is

usually faster.

11) Programming of some new PIC microcontrollers in the

HVP mode can cause that a warning message

indicating overcurrent on VPP appears. If that

message does not indicate a real fault it could be

caused by different technology which has been used

by Microchip for producing new devices, although

they are from pristine families. These devices have

slightly different parameters. It could be solved by

connecting capacitor of 1nF between the VPP pin

and GND and resistor of 10Ω in serial with VPP signal

if the fault persists.

12) When the MCU debug mode is enabled using a fuse,

the programmer cannot communicate with it.

AVR Microcontrollers

Fig.7: AVR microcontroller

1) A source of the clock signal, which is set in the device

or which will be set by fuses during programming

must be connected to the device. A crystal must be

connected if set up as the clock source.

2) Device fuses have been set up by the producer to the

internal oscillator with a frequency of 1MHz. In the

initial programming, the device should be

programmed with “Oscillator frequency” set up at

“>750kHz” or lower in the “PRESTO programmer

settings” window.

3) Not all AVR microcontrollers allow use of a crystal

(e.g.ATtiny13, ATtiny15).

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4) After the device fuses are correctly set up, right-click

(i.e. using the right mouse button) inside the

Configuration window and choose Learn fuses.

This saves the fuses in the up.ini file or in the project

if used. This is necessary due to the fact that .hex

files for AVR microcontrollers themselves do not

contain configuration fuses. If a device is

programmed from the command line, a .ppr project

file containing saved fuses needs to be used.

5) Ticking the Open file with data memory

automatically option in the File menu loads data

for the data memory simultaneously with the code/

main memory data.

6) Use the EESAVE fuse if preservation of data memory

is required. If the EESAVE is active, choose Program

all except data memory for programming,

otherwise a warning appears at this place (blank

check of data memory).

7) HPR3V3 is an optional accessory for programming

AVR microcontrollers which reguire 3.3V voltage with

PRESTO internal 5V power supply.

8) HPRAVR is an optional accessory for programming

AVR microcontrollers in applications with the

ISP10PIN standard connector on the device's side.

9) Some AVR devices have their ISP interface provided

at different pins than the SPI interface. Further

information can be found in the device data sheet (in

the Serial Downloading section).

AVR with TPI Interface (e.g.

ATtiny10)

Fig.8: AVR microcontroller, TPI interface

1) These microcontrollers require voltage 12V on the

RESET pin during programming in the HVP mode

while the programmer can only set 13V voltage level

on VPP. Therefore it is necessary to limit voltage on

the RESET pin by an external circuit. There is no need

of any external circuit for the LVP mode which is

preferred.

Atmel 8051

Fig.9: Atmel 8051 microcontroller