[51] Atmel isp schematic connections connections

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sinaku08

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sir actually ,

Iam trying to burn AT89S52 CONTROLLER. Iam following the attached schematic. in that

in the second connector I got doubt(ie in between 74HCT541 and the microcontroller) in the 6 pin connector.

CONNECTOR pin1 ( SLK ) ==== >CONTROLLER PIN P1.7 ( SCK )
CONNECTOR pin2 ( MISO ) ==== >CONTROLLER PIN P1.6 ( MISO )
CONNECTOR pin3 ( MOSI ) ==== >CONTROLLER PIN P1.5 ( MOSI )
CONNECTOR pin4 ( RESET ) ==== >CONTROLLER PIN P ( RST )
CONNECTOR pin5 ( CAP CONNECTED BETWEEN PIN-4 & 5) ==== > CONTROLLER'S WHICH PIN TO CONNECT?
CONNECTOR pin6 ( VCC ) ==== >CONTROLLER'S WHICH PIN TO CONNECT?



PLEASE GIVE ME SOME CLUE , I WILL BE VERY THANK FULL TO YOU.
 

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  • isp1_sch.gif
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this pin is a supply voltage and gnd so no need if external power is apply to board of isp or give voltage to micro controller voltage pin like vcc.
 

thank you sir........... so no need of 6pins (4 are enough if external supply is given )if no connector is used in between controller and the isp circuit, miso mosi sck reset pins can be connected directly right?

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THANK YOU ................so no need of 6pins (4 are enough if external supply is given )if no connector is used in between controller and the isp circuit, miso mosi sck reset pins can be connected directly right?
 

You need to have a common ground so unless the power supply is the same you need to connect the ground as well
 

yes alexen_e is right gnd must be common of both your isp and your board.
 

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