STK521 User Guide

2-7

8194B–AVR–01/12

To program the AVR using high-voltage (parallel) programming, connect the PROG_CTRL of the Atmel

STK500 to PRG_CTRL of the Atmel STK521 and PROG_DATA of STK500 to PRG_DATA of STK521

as shown in Figure 2-4. Make sure that the CLOCK switch is placed in the STK500 position.

The STK500 and STK521 jumpers & switches must must be configured as follows :

Table 2-2. High-Voltage programming jumper settings for the Atmel AT90PWM81.

Table 2-3. High-voltage programming switches settings for AT90PWM81.

The device can now be programmed using the high-voltage programming mode in the Atmel AVR Studio

STK500 software.

Note:

See the Atmel STK500 User Guide for information on how to use the STK500 front-end software

in high-voltage programming mode.

For the high-voltage programming mode to function correctly, the target voltage must be higher

than 4.5V.

2.4

Atmel AVR JTAGICE mkII Connector

See the following document :

“JTAGICE mkII Quick Start Guide” which purpose is “Connecting to a target board with the AVR

JTAGICE mkII”.

This note explains which signals are required for ISP and which signals are required for debugWIRE.

Figure 2-5 shows how to connect the Atmel AVR JTAGICE mkII probe on the STK521 board.

STK500

VTARGET

Mounted

AREF

Open

RESET

Mounted

XTAL1

Mounted

OSCSEL

Mounted, pin 1 and 2

BSEL2

Mounted

PJUMP

Open

STK521

POWER

VTG

CLOCK

STK500

RESET

RST/