Supplying the programmer
Programmer unit can be powered on two ways:
•
By the ISP connector from target circuit. In this case the power voltage VTG system should
be since 4.5 to 5.5 V, Power
jumper must be close.
•
Bye external power supply connected to POWER of programmer. In this case power voltage
VTG system should be since 1.8 to 6V,
after closing power jumper, power to the target circuit
can be supplied, the maximum current is 50 mA.
However power supply programmer unit
should be done across connector about diameter of pin 2.5 mm. The Voltage should be
since 9 to 15V for DC and since 7 to 13 for AC.
The implementation of arrangement of the power supply inside the programmer unit ISPcable II was
showed on following drawing.
Arrangement of the power supply of programmer unit
8
1
2
3
4
5
6
A
B
C
D
6
5
4
3
2
1
D
C
B
A
Title
Number
Revision
Size
B
Date:
7-Jul-2002
Sheet of
File:
C:\Moje dokumenty\user\Evb_at90.ddbDrawn By:
1
2
3
POWER
JUMPER
POWER
ISP HEADER
VCC
VTG
7805
Level conventer
