ISP_AVR
2
ATMEL AVR ISP Dongle Monday, September 11, 2000 http://www.beyondlogic.org Atmel AVR In System Programming Dongle Atmel offers a software package called the Atmel AVR ISP which allows the programming of AVR Microcontrollers in circuit with a simple dongle which is attached to the Parallel Port. This dongle is detailed below. It can be built cheaply, making it an ideal starting point for developing with ATMEL AVR micros. The current release of the software is Version 2.65 which can be downloaded at ftp://www .atmel.com/pub/atmel/avr_isp .zip (875 KB) If you are seeking a Serial/RS232 Version, have a look at Atmel’s Application Note AVR910 which details a serial programmer using at AT90S1200. 2 3 4 5 18 6 19 7 20 8 21 9 22 10 23 11 24 12 25 J1 Parallel Port 1A1 2 1A2 4 1A3 6 1A4 8 2A1 11 2A2 13 2A3 15 2A4 17 1Y1 18 1Y2 16 1Y3 14 1Y4 12 2Y1 9 2Y2 7 2Y3 5 2Y4 3 1G 1 2G 19 V C C 2 0 G N D 1 0 U1 74HC244 1 2 3 4 5 6 7 8 9 10 J2 ISP VC C C1 0.1uF VCC MOSI VDD GND GND GND GND L ED RST SC K MISO VC C DATA3 DATA2 DATA4 DATA5 DATA6 DATA7 R1 100K VC C Figure 1 : Schematic for the ATMEL ISP Value Adde d Dongle Using a 74HC244 Tri-State buffer as the main component, operation is extremely simple. The two loopback connections, pin 2 to 12 and 3 and 11 is used to identify the dongle. With both links in place the dongle is identified as a Value Added Pack Dongle. With only pins 2 and 12 links, it is reported as a STK300 or AVR ISP Dongle. With only 3 and 11 the dongle is reported as an STK200 or old Kanda ISP Dongle. DATA2 and DATA3 of the Parallel Port Drive the TriState Outputs. A low will allow the passing of the serial clock and data during programming. MOSI, LED, SCK and Reset being outputs are buffered from the Parallel Port’s DATA5, DATA6, DATA4 and DATA7 Res pectively. The only input, MISO i s fed into nACK, a status input of the Parallel Port. There are two standard ISP Connectors for Atmel AVR Microcontroller ISP Programming. One standard is the 10 pin version using a DIL 5x5 header of 0.1” Pitch, shown in the above schematic. This is used on the ATMEL STK Kits. The other is a more compact 6 pin version, once again using a DIL 3x3 header of 0.1” pitch. This 6 pin version is the standard connector for ATMEL ISP Programmers. The main advantage of the 10 pin header is the clean and easy use of 10 pin IDC crimp headers. Name Function Description MOSI Master Out - Slave In Data being transmitted to the part being programmed is sent on this pin LED Program LED Optional Programming LED RST Target MCU Reset Connects t o Target AVR. Target AVR is programmed while in Reset State. SCK Shift Clock Serial Clock Generated by the Programmer MISO Master In – Slave Out Data received from the part being programmed is sent on this pin VCC ISP Power Power Supply for the ISP. ISP Header must supply power to the dongle. GND Ground Common Ground 6 Pin Header 10 Pin Header 1 2 3 4 5 6 VDD GND MOSI RS SCK MI SO 1 2 3 4 5 6 7 8 9 10 VDD GN D GND GN D GND MOSI LED RST SCK MISO http://Electronica.ir www.Redownload.ir
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Transcript of ISP_AVR
8/3/2019 ISP_AVR
http://slidepdf.com/reader/full/ispavr 1/1
ATMEL AVR ISP Dongle Monday, September 11, 2000
http://www.beyondlogic.org
Atmel AVR In System Programming Dongle
Atmel offers a software package called the AtmelAVR ISP which allows the programming of AVRMicrocontrollers in circuit with a simple dongle whichis attached to the Parallel Port. This dongle isdetailed below. It can be built cheaply, making it anideal starting point for developing with ATMEL AVRmicros.
The current release of the software is Version 2.65which can be downloaded atftp://www.atmel.com/pub/atmel/avr_isp.zip (875KB)
If you are seeking a Serial/RS232 Version, have alook at Atmel’s Application Note AVR910 whichdetails a serial programmer using at AT90S1200.
2
3
4
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
J1
Parallel Port
1A12
1A24
1A36
1A48
2A111
2A213
2A315
2A417
1Y118
1Y216
1Y314
1Y412
2Y19
2Y27
2Y35
2Y43
1G1
2G19
V C C
2 0
G N D
1 0
U1 74HC244
1 2
3 4
5 6
7 8
9 10
J2
ISP
VCC
C1
0.1uF
VCC
MOSI VDD
GND
GND
GND
GND
LED
RST
SCK
MISO
VCC
DATA3
DATA2
DATA4
DATA5
DATA6
DATA7
R1
100K
VCC
Figure 1 : Schematic for the ATMEL ISP Value Added Dongle
Using a 74HC244 Tri-State buffer as the maincomponent, operation is extremely simple. The twoloopback connections, pin 2 to 12 and 3 and 11 isused to identify the dongle. With both links in placethe dongle is identified as a Value Added PackDongle. With only pins 2 and 12 links, it is reportedas a STK300 or AVR ISP Dongle. With only 3 and 11the dongle is reported as an STK200 or old KandaISP Dongle.
DATA2 and DATA3 of the Parallel Port Drive theTriState Outputs. A low will allow the passing of theserial clock and data during programming. MOSI,
LED, SCK and Reset being outputs are buffered fromthe Parallel Port’s DATA5, DATA6, DATA4 andDATA7 Respectively. The only input, MISO is fed intonACK, a status input of the Parallel Port.
There are two standard ISP Connectors for AtmelAVR Microcontroller ISP Programming. One standardis the 10 pin version using a DIL 5x5 header of 0.1”Pitch, shown in the above schematic. This is used onthe ATMEL STK Kits. The other is a more compact 6pin version, once again using a DIL 3x3 header of0.1” pitch. This 6 pin version is the standardconnector for ATMEL ISP Programmers.
The main advantage of the 10 pin header is the cleanand easy use of 10 pin IDC crimp headers.
Name Function DescriptionMOSI Master Out - Slave
InData being transmitted to thepart being programmed is senton this pin
LED Program LED Optional Programming LED
RST Target MCU Reset Connects to Target AVR.Target AVR is programmedwhile in Reset State.
SCK Shift Clock Serial Clock Generated by theProgrammer
MISO Master In – SlaveOut
Data received from the partbeing programmed is sent onthis pin
VCC ISP Power Power Supply for the ISP. ISPHeader must supply power to
the dongle.GND Ground Common Ground
6 Pin Header 10 Pin Header
1 2
3 4
5 6
VDD
GND
MOSI
RS
SCK MISO
1 2
3 4
5 6
7 8
9 10
VDD
GND
GND
GND
GND
MOSI
LED
RST
SCK
MISO
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