AT89STK-11 Atmel, AT89STK-11 Datasheet - Page 7

• Manufacturer Part Number: AT89STK-11
• Description: KIT STARTER FOR AT89C51RX2
• Manufacturer: Atmel
• Type: MCUr

Specifications of AT89STK-11

• Contents: Evaluation Board, Software and Documentation
• Processor To Be Evaluated: AT89C51Rx
• Interface Type: RS-232, SPI, TWI
• For Use With/related Products: AT89C51Rx2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.3.1.2
2.4
2.4.1
2.4.2
AT89STK-11 Hardware User Guide
External EXT
connector
Reset
Power-on RESET
RESET Push Button
Figure 2-3. Male JACK Outlet and Wires
Note:
Note:
The battery power connector implemented on board is a male two point SIP connector.
It requires an external power cable with a female 2 points connector.
When powered though this interface, polarization is mandatory as no protection is given
on board.
The EXT power supply circuitry support input supply from 2.7V up to 5.5V DC.
Figure 2-4. EXT PWR Female Connector / Cable
Note:
Note:
To be compatible with Atmel microcontrollers which have (or not) its on-chip RESET cir-
cuitry (c.f.microcontroller datasheet), the board provides a RESET signal witch can
come from 2 different sources:
The on-board RC network acts as power-on RESET.
By pressing the RESET push button on the board, a warm RESET of the microcontroller
is performed.
Do not mount more than one power supply source on AT89STK-11 Board.
There is a diode voltage level between the negative output of the power supply
and the “GND”. This could introduce some voltage gap during measurement
and instrumentation.
Do not mount more than one power supply source on board.
Keep SP1 closed when using the EXT input
Hardware Description
7676B–8051–08/07
2-6