Atmel STK502 User manual

STK502
..............................................................................................
User Guide

STK502 User Guide i
2528A–AVR–11/02
Table of Contents
Section 1
Introduction...........................................................................................1-1
Section 2
Using the STK502 Top Module.............................................................2-1
2.1 Connecting the STK502 to the STK500 Starter Kit...................................2-1
2.1.1 Placing an ATmega169 on STK502...................................................2-1
2.2 PORT Connectors.....................................................................................2-2
2.2.1 PORT E/PORT F................................................................................2-2
2.2.2 PORT G/RST......................................................................................2-2
2.3 Programming the ATmega169..................................................................2-4
2.3.1 In-System Programming.....................................................................2-4
2.3.2 High-voltage Programming.................................................................2-5
2.4 JTAG Connector .......................................................................................2-6
2.5 LCD Display..............................................................................................2-7
2.5.1 Connecting the STK502 LCD to the ATmega169...............................2-7
2.5.2 Default Segment Configuration ..........................................................2-7
2.5.3 Using Both Colons on the Display......................................................2-8
2.6 TOSC Switch...........................................................................................2-10
2.7 Sensor.....................................................................................................2-11
2.7.1 Sensor Switches...............................................................................2-11
Section 3
Troubleshooting Guide .........................................................................3-1
Section 4
Technical Specifications .......................................................................4-1
4.1 STK502 LCD Bit Mappings.......................................................................4-3
4.1.1 Alphanumeric Digit Number Two........................................................4-3
4.1.2 Alphanumeric Digit Number Three .....................................................4-3
4.1.3 Alphanumeric Digit Number Four .......................................................4-3
4.1.4 Alphanumeric Digit Number Five........................................................4-3
4.1.5 Alphanumeric Digit Number Six..........................................................4-4
4.1.6 Alphanumeric Digit Number Seven ....................................................4-4

Table of Contents
ii STK502 User Guide
2528A–AVR–11/02
Section 5
Technical Support.................................................................................5-1
Section 6
Complete Schematics...........................................................................6-1

STK502 User Guide 1-1
Rev. 2528A–AVR–11/02
Section 1
Introduction
The STK502 board is a top module designed to add ATmega169 support to the STK500
development board from Atmel Corporation.
STK502 includes connectors and hardware allowing full utilization of the new features of
the ATmega169. The Zero Insertion Force (ZIF) socket makes it easy to use of TQFP
packages for prototyping.
This user guide is a general getting started guide as well as a complete technical refer-
ence for advanced users.
The STK502 board also includes a demonstration application, and comes with two
application notes, “AVR064: STK502 – A Temperature Monitoring System with LCD
Output” and “AVR065: LCD Driver for the STK502”. These application notes explain
how to use the different modules in the device. Included in the kit is a pre-programmed
ATmega169. Insert the device in the ZIF socket and the demonstration application will
start immediately.
Figure 1-1. STK502 Top Module for STK500

Introduction
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1.1 Features Supports the ATmega169 with Built-in LCD Controller.
LCD-on-glass Display for Demonstrating the ATmega169 LCD Controller.
Supported by AVR Studio®4.
Zero Insertion Force Socket for TQFP Packages.
High Voltage Parallel Programming.
Serial Programming.
TQFP Footprint for Emulator Adapters.
Port Extension Connectors for Port E, F, and G.
LCD Display Header for Using an External LCD Display.
LCD and Other Peripherals Can be Disconnected from the Device.
JTAG Connector for On-chip Debugging Using JTAG ICE.
On-board 32 kHz Crystal for Easy Real Time Clock Implementations.
Temperature Sensor for the Demo Application.
Quick Reference to all Switches and Jumpers in the Silk-Screen of the PCB.
Pre-programmed ATmega169 with Demonstration Application. Includes C-code
Examples for all Major Peripherals on the ATmega169 Device.
– The Way to Get Going with your ATmega169

STK502 User Guide 2-1
Rev. 2528A–AVR–11/02
Section 2
Using the STK502 Top Module
This section describes in detail how the STK502 is used with the STK500.
2.1 Connecting the
STK502 to the
STK500 Starter
Kit
Connect STK502 to the STK500 expansion header 0 and 1. It is important that the top
module is connected in the correct orientation as shown in Figure 2-1. EXPAND0 written
on the STK502 top module should match EXPAND0 written beside the expansion
header on the STK500 board.
Figure 2-1. Connecting STK502 to the STK500 Board
Note: Connecting STK502 with wrong orientation may damage the board.
2.1.1 Placing an
ATmega169 on
STK502
STK502 contains both a ZIF socket, and a footprint for a TQFP package which allows an
easy way of soldering an emulator adapter directly into the STK502. Care should be
taken so that the device (or adapter) is mounted with the correct orientation. Figure 2-2
shows the location of pin1 for the ZIF socket and the TQFP footprint.

Using the STK502 Top Module
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Figure 2-2. Pin1 on ZIF Socket and TQFP Footprint
Caution: Do not mount an ATmega169 on the STK502 at the same time as an AVR is
mounted on the STK500 board. Neither of the devices will work as intended.
2.2 PORT
Connectors ATmega169 have additional ports to those available on the STK500. The ports are
located on the STK502 board. They have the same pin out and functionality as the ports
on the STK500 board. Port A to Port D are already present on the STK500 board. They
are not duplicated on the STK502.
2.2.1 PORT E/PORT F Figure 2-3 shows the pin out for the I/O port headers Port E and Port F.
Figure 2-3. General I/O Ports
Note: Port E is also present on the STK500, but only PE0 to PE2 (three least signifi-
cant bits) are accessible there. To access all Port E bits the connector on the
STK502 must be used.
2.2.2 PORT G/RST In addition to the normal Port G pins, this connector has the RESET-signal. Se Figure 2-
4.
PE0
PE2
PE4
PE6
GND
PE1
PE3
PE5
PE7
VTG
PORTE
PF0
PF2
PF4
PF6
GND
PF1
PF3
PF5
PF7
VTG
PORTF
1 2 1 2

Using the STK502 Top Module
STK502 User Guide 2-3
2528A–AVR–11/02
Figure 2-4. PORTG/RST
2.2.2.1 PG0 - PG5 These are general I/O ports connected to ZIF socket and the TQFP footprint.
2.2.2.2 RST On the ATmega169 the RESET-signal and PG5 share the same pin. The “RST” is the
RESET-signal that comes from the STK500 board. Please note that it is not directly con-
nected to the ZIF socket or the TQFP footprint on the STK502. This because the
RESET-signal on the STK500 has an pull-up resistor to VCCT which will interfere with
PG5 when used as an ordinary I/O-pin.
If RESET/PG5-pin on ATmega169 shall be used as a Reset pin, the RST and PG5 on
the PORTG /RST must be connected with a jumper. See Figure 2-5.
If the pin shall be used as an I/O-pin the jumper must be removed.
Figure 2-5. The RESET Signal on PORTG/RST
PG0
PG2
PG4
NC
GND
PG1
PG3
PG5
RST
VTG
PORTG/RST
1 2

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2.3 Programmingthe
ATmega169 The ATmega169 can be programmed using both SPI and High-voltage Parallel Pro-
gramming. This section will explain how to connect the programming cables to
successfully use one of these two modes. The AVR Studio STK500 software is used in
the same way as for other AVR parts as described in the STK500 User Guide.
Note: The ATmega169 also support Self Programming, See AVR109 application note
for more information on this topic.
Note: The jumper for the Reset-signal on PORTG/RST must be mounted before any
programming can take place. See Section 2.2.2.2
2.3.1 In-System
Programming Figure 2-6. In-System Programming
To program the ATmega169 using ISP Programming mode, connect the 6-wire cable
between the ISP6PIN connector on the STK500 board and the ISP connector on the
STK502 board as shown in Figure 2-6. The device can be programmed using the Serial
Programming mode in the AVR Studio4 STK500 software.
Note: See STK500 User Guide for information on how to use the STK500 front-end
software for ISP Programming.

Using the STK502 Top Module
STK502 User Guide 2-5
2528A–AVR–11/02
2.3.2 High-voltage
Programming Figure 2-7. High-voltage (Parallel) Programming
To program the ATmega169 using High-voltage (Parallel) Programming, connect the
PROGCTRL to PORTD and PROGDATA to PORTB on the STK500 as shown in Figure
2-7. Make sure that the TOSC-switch is placed in the XTAL position. See Section 2.6,
“TOSC Switch”.
As described in the STK500 User Guide (jumper settings), mount the BSEL2 jumper in
order to High-voltage Program the ATmega devices. This setting also applies to High-
voltage Programming of the ATmega169.
The device can now be programmed using the High-voltage Programming mode in AVR
Studio STK500 software.
Note: See the STK500 User Guide for information on how to use the STK500 front-
end software in High-voltage Programming mode.
Note: For the High-voltage Programming mode to function correctly, the target voltage
must be higher than 4.5V.
Caution: Make sure to disconnect LCD-display from the segment pins header. Other-
wise the lifetime of the LCD display may be severely reduced. See Figure 2-10.

Using the STK502 Top Module
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2.4 JTAG Connector Figure 2-8 shows how to connect the JTAG ICE probe on the STK502 board.
Figure 2-8. Connecting JTAG ICE to the STK502
The JTAG connector is used for the ATmega169 built-in JTAG interface. The pin out of
the connector is shown in Figure 2-9 and is compliant with the pin out of the JTAG ICE
available from Atmel. Connecting a JTAG ICE to this connector allows On-chip Debug-
ging of the ATmega169.
More information about the JTAG ICE and On-chip Debugging can be found in the AVR
JTAG ICE User Guide, which is available at the Atmel web site, www.atmel.com.
Figure 2-9. JTAG Connector
TCK
TDO
TMS
VTG
TDI
GN
D
VTG
RST
NC
GN
D
JTAG
1 2

Using the STK502 Top Module
STK502 User Guide 2-7
2528A–AVR–11/02
2.5 LCD Display STK502 includes a LCD display. It features six 14-segments digits, and some additional
segments. All in all the display supports 120 segments. The display is designed for 3V
operating voltage. See the Technical Specifications for more details on the display.
2.5.1 Connecting the
STK502 LCD to the
ATmega169
The segment-pins from the ATmega169 are located at PORTA, PORTC, PORTD, and
PORTG. For simplicity in use they are all joined together on the header labeled “Seg-
ment pins from ATmega169”. The header next to it, labelled “STK502 LCD pins” holds
all the segments-pins for the LCD-display on the STK502.
By using the 34-lead cable that comes with the STK502-kit, the two pin-headers can be
connected, allowing the ATmega169 to control the LCD-display. See Figure 2-10.
Figure 2-10. Connecting the ATmega169 to the STK502 LCD
Caution: High-voltage Programming uses PORTB and PORTD. Be sure to disconnect
any LCD-display connected to the ATmega169 during the High-voltage Programming.
Otherwise the lifetime of the display may be reduced.
Caution: When using PORTA, PORTC, PORTD, or PORTG as regular I/O ports, the
corresponding LCD-segment pins must be disconnected from the ATmega169.
2.5.2 Default Segment
Configuration ATmega169 supports 100 segments. Thus not all of the 120 segments on the LCD-dis- play can be shown simultaneously. Five of the 30 segment-pins on the LCD display has
to be left unconnected. The LCD-pins that are not connected are pin #: 3, 24, 30, 31,
and 32. See Technical Specifications for an overview of the excluded segments.
In order to use some of the segments on the LCD display that by default are not
included or in order to use some of the segment pins as ordinary I/O-pins, use a custom
strap between the two 34-pin headers. These to headers are lined up so they will fit in to
a 2.54 mm pitch grid for easy connecting, e.g., a experiment board on top of them.
The pin out for these two headers (Figure 2-11) can be found on the bottom-side of the
STK502-PCB or in Section 6 “Complete Schematics”.

Using the STK502 Top Module
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Figure 2-11. Pin out for LCD Headers
This hardware configuration will give a certain bit-mapping between the bits in the
ATmega169 LCDDRx Register and the segments on the STK502 LCD. See Section 4.1
“STK502 LCD Bit Mappings”
2.5.3 Using Both Colons
on the Display With the header J300 labelled “19 24” one can connect LCD-pin 24 (which is default unconnected) to LCD-pin 19 by the use of a jumper. See Figure 2-12. The reason for
doing so is that the LCD-pin 24 has the segment “COL1” and LCD-pin 19 has “COL2”. In
applications where a clock, date etc. shall be displayed, it can be useful to control both
colons on the LCD-display. But connecting these LCD-pins will also lead to a connection
between segment (see Technical Specifications) “S5” and “3”, “S8” and “S7”, “8” and
“7”, which will in practice make them useless. See Figure 2-13 showing which seg-
ments are available on the LCD-display with the default segment configuration.
SEG01
SEG03
SEG05
SEG07
SEG09
SEG11
SEG13
SEG15
SEG17
SEG19
SEG21
SEG23
SEG25
NC
NC
COM00
COM02
SEG02
SEG04
SEG06
SEG08
SEG10
SEG12
SEG14
SEG16
SEG18
SEG20
SEG22
SEG24
NC
NC
NC
COM01
COM03
Seg. M169
1 2
LCD27
LCD29
LCD06
LCD26
LCD08
LCD23
LCD10
LCD21
LCD14
LCD11
LCD18
LCD15
LCD19
LCD24
LCD31
BP1
BP4
LCD2
8
LCD0
4
LCD2
5
LCD0
5
LCD2
2
LCD0
7
LCD2
0
LCD0
9
LCD1
2
LCD1
3
LCD1
6
LCD1
7
LCD0
3
LCD3
0
LCD3
2
BP2
BP3
LCD Pins
1 2

Using the STK502 Top Module
STK502 User Guide 2-9
2528A–AVR–11/02
Figure 2-12. Jumper to connect COL1 to COL2
Figure 2-13. Default LCD-segment configuration, with and without the jumper shown in
Figure 2-12
Other LCD-displays can be connected to the ATmega169, either through the header
“Segment pins from ATmega169” where all the segment pins are gathered or through
the ordinary Port-connectors PORTA, PORTC, PORTD, and PORTG.
Note: Make sure the display is compatible with the electrical characteristics on the
ATmega169.
For more information on how to write software for the LCD-display see application note
“AVR064: STK502 – A Temperature Monitoring System with LCD Output” and applica-
tion note “AVR065: LCD Driver for the STK502 LCD”.
Note: The LCD-display on the STK502 can be ordered separately from ACTE Norway
(www.acte.no).
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Price: NOK 99,-
Ordering number: H4042-DL DE5156/L.

Using the STK502 Top Module
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2.6 TOSC Switch Figure 2-14. TOSC Switch
On the ATmega169 the TOSC1 and TOSC2 lines are shared with XTAL1 and XTAL2.
The TOSC switch selects whether the 32 kHz crystal on the STK502, or the XT1/XT2
signals from STK500 should be connected to these pins on the device.
Figure 2-15 shows a simplified block schematic on how this is implemented.
Figure 2-15. TOSC Block Schematic
XTAL1/TOSC1
AVR
XTAL2/TOSC2
XT1
XT2
TOSC
Switch
32 kHz
To
STK500

Using the STK502 Top Module
STK502 User Guide 2-11
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2.7 Sensor Figure 2-16. NTC-thermistor
STK502 includes a two screw-terminal block where a sensor can be connected. The
STK502 kit is shipped with a NTC-thermistor attached to this screw-terminal. A NTC-
thermistor is characterised by the fact that when the temperature goes down the resis-
tance goes up. Using a voltage divider and reading the voltage over the thermistor
through the ADC-channels on ATmega169, the temperature can be calculated. Applica-
tion note “AVR064: STK502 – A Temperature Monitoring System with LCD Output”
describes the details of the application.
2.7.1 Sensor Switches Two switches on the STK502 are used to connect the sensor to the ADC-channels on
the ATmega169 as shown in Figure 2-17.
Figure 2-17. Temperature sensor switches

Using the STK502 Top Module
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2.7.1.1 AREF Switch The switch named AREF selects the input to the AREF-pin on the ATmega169.
Figure 2-18. AREF Switch
Positions:
AREF: In this position the AREF from the STK500 is connected to the AREF pin on
the ATmega169. This is the default position.
VREF: In this position the VREF from the 1.263V voltage reference on the STK502 is
connected to the AREF pin on the ATmega169. Select this position in order to run the
code in Application Note “AVR064: STK502 – A Temperature Monitoring System with
LCD Output”
2.7.1.2 PF[1:0] Switch The PF[1:0] switch selects the input to the PF1 and PF0 pins (ADC channel 1/0) on the
ATmega169.
Figure 2-19. PF[1:0] Switch
Positions:
PIN: In this position the PF0 and PF1 are from the PORTF on the STK502 are
connected to the PF0 and PF1 on the ATmega169. Default position.
Sensor: In this position the pin 1 from the screw-terminal on the STK502 are
connected to PF0 on the ATmega169, and the pin 2 from the screw-terminal are
connected to PF1 on the ATmega169. Select this position in order to run the code in
Application Note “AVR064: STK502 – A Temperature Monitoring System with LCD
output”
In the sensor position both PF0 and PF1 are connected to the senor pins, regardless of
using single ended or differential ADC-measurements in the application. This means
that it's not possible to use PF1 as an ordinary I/O-port even though only PF0 (single
ended) is used with the ADC.
AREF
AVR
From
STK500
STK502
STK502
AREF
Switch
Voltage refernce
for the sensor
VREF
AREF
PF0 (ADC0)
AVR
PF1 (ADC1)
PORTF0
Sensor
pin 1
PORTF1
Sensor
pin 2
PF[1:0]
Switch

STK502 User Guide 3-1
Rev. 2528A–AVR–11/02
Section 3
Troubleshooting Guide
Table 3-1. Troubleshooting Guide
Problem Reason Solution
Nothing is displayed on
the LCD.
The LCD is not connected. Attach the 34-pins cable between
the to 34-pins headers on the
STK502.
The LCD is not enabled in
the AVR device. Check the LCD initialisation(1).
The update frequency is
not correct. Verify that the clock prescaling correspond with the clock source(1).
Some segments on the
LCD seems to be stuck
at high/low.
The PORTA/C/D and/or G
are connected to
something else than the
LCD display.
Check that nothing is connected to
these PORTS on the STK500 and
STK502.
Can’t control
PORTF[1:0] PF[1:0] is not connected to the ATmega169. Set the PF[1:0] switch in the PIN- position.
Serial Programming
does not work
ISP cable not connected. Connect the ISP cable according to
Figure 2-6.
STK500 target voltage
error. Please refer to the ATmega169 datasheet for the Serial
Programming Voltage limits. Adjust
the target voltage on the STK500
board accordingly.
The RSTDISBL Fuse is
programmed. Use Parallel Programming to unprogram the RSTDISBL Fuse.

Troubleshooting Guide
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2528A–AVR–11/02
Note: 1. See the application note “AVR065: LCD Driver for the STK502 LCD” on how to con-
trol the LCD-display or the the application note “AVR064: STK502 – A Temperature
Monitoring System with LCD Output”.
Parallel Programming
does not work.
Cables not connected
properly. Please refer to Figure 2-7 for correct Parallel Programming setup.
STK500 target voltage
error. PleaserefertotheATmega169 data sheet for the Parallel Programming
Voltage limits. Adjust the target
voltage on the STK500 board
accordingly.
The TOSC switch is not
correctly set. Set the TOSC switch in the XTAL- position.
No programming works. The RESET-signal is not
connected to the
ATmega169.
Connect PG5 and RST with a
jumper. See Section 2.2.2.2 RST.
Table 3-1. Troubleshooting Guide
Problem Reason Solution