The exact amount of current available from the 5V output pin of the A-Star Mini LV will depend on the input voltage you are using. For lower input voltages the regulator will not be able to supply close to 1.6A for any amount of time. However, with any input voltage you would probably be able to use the 5V regulator to power that motor. Please note that since the 5V line on the A-Star also powers the AVR directly, you should make sure to use proper protections to limit voltage spikes caused by the motor (e.g. capacitors, flyback diode, etc).
In case you did not already realize it, running a motor from a constant voltage like that will mean that it will only spin in one direction at a constant speed. If you want to control the speed and direction, you would want to use a motor driver.
For running a small motor at 1A and VIN you are better off using a Baby-Orangutan. In the pololu archive of Orangutan LV168 under resources there is an example Demo3 where you can control the motor outputs with a potmeter. OrangutanLV168Project3.zip (28 KB)
Some time ago I dismantled an old HP printer and took out a small 12V stepper motor, I used this in a project and controlled the speed with a Baby-O. You can control the stepper motor with the M1 and M2 outputs.
Here is the code I used:
[code]// F_CPU tells util/delay.h our clock frequency
//#define F_CPU 8000000UL // Orangutan frequency (8MHz) #define F_CPU 20000000UL // Baby Orangutan frequency (20MHz) #include <avr/io.h> #include <util/delay.h>