EASY PROGRAMMER ISP 89SXXX
Introduction
This ISP Programmer can be used either for in-system programming or as a stand-alone spi programmer for Atmel ISP programmable devices.
This ISP Programmer can be used either for in-system programming or as a stand-alone spi programmer for Atmel ISP programmable devices.
Hardware
Figure T.4 shows the circuit diagram of the in-system programmer interface, the power to the interface is provided by the target system. The 74LS244 ic isolate and buffer the parallel port signals.
Figure T.4 shows the circuit diagram of the in-system programmer interface, the power to the interface is provided by the target system. The 74LS244 ic isolate and buffer the parallel port signals.
No
|
Component
|
Discription
|
1
|
Connector DB 25
| |
2
|
6 Parallel Cable
|
about 0.5 meter
|
3
|
Connector Header 6 pin
| |
4
|
House Connector DB 25
| |
5
|
74LS244
| |
6
|
PCB
|
about 5 x 5 cm
|
Figure T.4 Schematic Diagram Programmer with LPT Connection
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