Equinox Systems ISP juno, Руководство пользователя

Страница: 30 / 60

ISPJUNO - Portable ISP Programmer - User Guide V0.84 – 17/04/20 29
4.2.2 Instructions for target independent powering
The default setting when creating a new ‘programming project’ for the programmer using EQTools
is that the ‘Target System is independently powered’ ……
This means that an
‘external power supply’ is being used to provide power to the ‘Target System’ .
1. If not already selected, select the ‘Target System is independently powered’ radio button.
2. Set the ‘Voltage’ under the ‘Target Voltage Settings’ section to match the I/O voltage of the
target IC / device which is being programmed.
Example:
If the target IC / device is being powered at 3.3V, then set the ‘Voltage’ to be ‘3.3V’ .
The programmer IO signals will then swing between 0V and 3.3V.
3. Tick the ‘Check Target voltage’ box
- Enabling this option forces the programmer to physically measure the actual voltage being fed from
the ‘Target System’ into the TVCC pin on the programmer.
- If the programmer measures the ‘Target voltage’ and it is OFF (0V) or not within the voltage
tolerance specified, the programmer will display a ‘Voltage error’ .