Device and Jumper Information
STK100 Starter Kit User Guide
4-5
Pin 4:
PA3 (AD2 input on 8-pin part)
Pin 5:
PA4 (AD3 input on 8-pin part)
Pin 6:
PA5 (AD0 input on 8-pin part)
Pin 7:
PA6
Pin 8:
A/D reference input
Pin 9:
Analog ground
Pin 10:
Analog supply rail
Note that additional analog inputs are available on the port B connector as shown in
parentheses on the port B connection table.
Finally, there are two expansion connectors that can be used to drive external circuits.
4.5.6
J13
ISP Connector: This will be used to enable the user to program external devices in cir-
cuit using the system. It conforms to the standard Atmel ISP pinout.
4.5.7
J12
Expansion Connector: For future use.
4.6
Notes on Usage
1.
It is advisable to disconnect all user circuitry when attempting to program as it
may override the programming control signals and prevent a successful pro-
gramming session.
2.
Attempting to draw more than 150 mA of current from V
CC
will invoke the current-
limiting circuit.
3.
Users are advised not to input signals larger than the V
CC
setting to any device
pin as it may damage the device and/or the starter kit hardware.
4.
In order to supply the maximum flexibility, the LEDs and switches have been
connected together. The design is such that if the port DDRx register is set to
input (0), then the LED will be turned off and the input will be a 1. If the switch is
pressed, then the LED will light for as long as the switch is pressed and will extin-
guish when released. When the switch is pressed, the input on the port will be a
0. If the DDRx register bit is set to output (1), then sending a 0 out on the port will
turn the LED on and a 1 will turn it off. Note that the circuit is arranged so the
LED is brighter when the switch is pressed than when it is pulled low by the
device. It is possible to both read the switch and write to the LED by careful
manipulation of the DDRx register (set it to output for most of the time and briefly
switch to input when a switch read is required).
5.
The infrared transmitter is modulated by the device and is driven directly. The
receiver has a built-in demodulator and provides a direct digital signal to the
device.
6.
The keypad interface was designed for a 10-key matrixed keypad and uses the
multiplexed keypad interface on the 28-pin device.
7.
Ensure the jumper next to the socket being used is set to Program or Run, as
required.
8.
Programming low-voltage parts: Some 3.3-volt parts may need 5V programming
voltages, even though they run at lower voltages. We recommended that all
peripheral jumpers (J10) are removed to isolate user circuits before program-
ming the device.
Summary of Contents for AVR STK100
Page 1: ...R STK100 Starter Kit User Guide December 1999...
Page 5: ...Introduction 1 2 STK100 Starter Kit User Guide...
Page 15: ...Device and Jumper Information 4 6 STK100 Starter Kit User Guide...
Page 17: ...Installing the Software 5 2 STK100 Starter Kit User Guide...
Page 21: ...How to Use the Software 6 4 STK100 Starter Kit User Guide...
Page 25: ...Menu and Option Descriptions 7 4 STK100 Starter Kit User Guide...
Page 32: ...Appendix A STK100 Schematics STK100 Starter Kit User Guide 9 5...
Page 33: ...Appendix A STK100 Schematics 9 6 STK100 Starter Kit User Guide...
