DOC1925 datasheet(32/61 Pages) ETC1

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Hardware Description

3-22

AVR STK500 User Guide

1925C–AVR–3/03

Figure 3-30. XTAL1 and OSCSEL Connections

3.8.5

BSEL2 Jumper

The BSEL2 jumper connects the Byte Select 2 signal for High-voltage Programming of

ATmega8, ATmega16, ATmega161, ATmega163, ATmega128, and ATmega323. The

BSEL2 jumper should only be mounted when High-voltage Programming ATmega16,

ATmega161, ATmega163, ATmega128, or ATmega323. When using ATmega8, con-

nect the right BSEL2 pin to PC2 in the target area. See Figure 3-31. For descriptions of

the Byte Select 2 signal, see the programming section of the corresponding parts

datasheet.

Figure 3-31. BSEL2 Connection for ATmega8

3.8.6

PJUMP Jumpers

The PJUMP jumpers route the programming pin of AT90S2333, AT90S4433, and

ATmega8 to the programming lines when using High-voltage Programming. The

PJUMP jumpers should only be mounted when using High-voltage Programming on

AT90S2333, AT90S4433, or ATmega8. During debugging, High-voltage Programming

of other parts and ISP programming, these jumpers should not be mounted.

Figure 3-32. PJUMP Jumpers Placement

PE1

RST

GND

XT2

VTG

PE0

PE2

REF

XT1

GND

1 2

XTAL1 NET

XTAL1

Voltage

converter

VTG

AVR

Studio

MASTER

MCU

PORTE

Jumper

Oscillator

OSCSEL

BSEL2

PJUMP

Cable to PC2

Correct

Jumper

Placement

Not

Correct

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