AT89STK-05 Atmel, AT89STK-05 Datasheet - Page 7

• Manufacturer Part Number: AT89STK-05
• Description: KIT STARTER FOR AT89C5131
• Manufacturer: Atmel

Specifications of AT89STK-05

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: AT89C5131
• Primary Attributes: *
• Secondary Attributes: *
• Processor To Be Evaluated: AT89C5131A
• Interface Type: RS-232, USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.3
2.3.1
2.3.2
2.3.3
2.3.4
AT89C5131A Starter Kit Hardware User Guide
C51 Standard
Settings
Reset
Clock
EA
INT0
The external Reset push-button (SW3) is provided to easily generate a warm reset. This
button is used for ISP process. The Reset applied is active low.
A crystal can be easily installed on the Y1 socket. The clock can also be provided using
the J8 connector instead of the crystal.
Note:
Place a jumper on the EA connector (J10) to force the EA pin to ground and execute
external code. Otherwise internal code will be executed.
Figure 2-3. EA Circuitry
In order to use the on-board INT0 circuitry, connect the J7 Jumper to the AT89C5131A.
When you press the INT0 button (SW5), the P3.2 pin will go low which induces an inter-
rupt event.
Note:
Figure 2-4. INT0 Circuitry
Remove the clock generators before the using the programmer.
Remove the J7 jumper before using the programmer. Otherwise the program-
mer will not function.
Hardware Description
4245A–USB–11/04
2-5