AT89STK-03 Atmel, AT89STK-03 Datasheet - Page 6

• Manufacturer Part Number: AT89STK-03
• Description: KIT STARTER FOR MCU AT8XC5122/23
• Manufacturer: Atmel

Specifications of AT89STK-03

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: AT89C5122
• Primary Attributes: *
• Secondary Attributes: *
• Processor To Be Evaluated: AT8xC512x
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

4.1
AT89STK03 Starter Kit Software User User Guide
Architecture
Overview
The SCIB-USB HID keyboard demonstration firmware is based on a scheduler in free
running mode.
The main program only enables the interrupts and launches the scheduler.
The first process of the scheduler is the initialization of all the peripherals and of the
associated variables.
Once the initialization process is complete, the scheduler launches each task one after
the other. The first task is the USB task. This task manages the Default Control Endpoint
for the enumeration process and the HID keyboard control.
The second task called by the scheduler is the USB KBD task that transmits the keys
pressed to the USB controller.
The third and last task called by the scheduler is the SCIB task. This task shows a sim-
ple demonstration to get the ATR from a GemclubMemo smart card.
Software Architecture
Section 4
7612B–SCR–01/07
4-5