AT90PWM2/3 Programming User Guide

-1

7654A–AVR–06/06

Section 1

AT90PWM2/3 Programming Guide

1.1

Introduction

This document is intended for AT90PWM2/3 users, it focuses on fuse bit programming

and configuration. It also provides information and synthesis about fuse bit configuration

versus different Atmel hardware development kits using AT90PWM2/3.

For each hardware element referenced in this document please refer to the correspond-

ing hardware user guide available on the Atmel web site.

1.2

General Remarks

Concerning Fuse

Bits

When DWEN fuse bit is enable there is no more ISP. The only way to disable this fuse is

parallel programming or Debug wire using JTAGICE mkII (open project, start debugging

session, then in JTAGICE mkII options there is a “Disable DebugWire” button).

When SPIEN fuse bit is disable there is no more ISP, the only wayto enable it is parallel

programming .

On AT90PWM2/3, When PSCxRB or PSCRV fuse are used, the parallel programming

fails, ISP must be used to desativate these fuse bits or to program the part.

Warning: If SPIEN fuse is disable and PSCxRB used, the chip’s firmware can be pro-

grammed using DebugWire only. The fuse bits cannot be changed any more.

Table 1-1. Fuse bit configuration vs effect on ATAVRMC100, ATAVRMC200, ATAVRFBKIT, STK500+STK520 used with

AT90PWM2/3 Rev A

PSCxRB

RSTDISBLE

DWEN

SPIEN

ATAVRMC100, ATAVRMCMC200,

ATAVRFBKIT

STK500 and STK520

AT90PWM2/3 is no more programmable, it

must be unsoldered

AT90PWM2/3 can be programmed using

parallel programming only

⌧

AT90PWM2/3 code can be programmed using

ISP only.

AT90PWM2/3 code can be programmed using

ISP and parallel programming.

⌧

AT90PWM2/3 code can be programmed using

Debugwire only. Fuse bits are no more

accessible.

AT90PWM2/3 code can be programmed using

Debugwire and parallel programming only.

⌧

⌧

AT90PWM2/3 code can be programmed using

Debugwire Fuse bits are accessible in ISP

mode only.

AT90PWM2/3 code can be programmed using

Debugwire and parallel programming.