AN2722 Datasheet, PDF (13/16 Pages) STMicroelectronics – Demonstration board user guidelines for the

AN2722
TS4601B demonstration software
3.3
Common error messages
No acknowledge for address
You pressed an output mode button and the software displays an information pop-up
window that indicates “Error: No acknowledge for address!” (see example in Figure 9).
This error message can have several causes.
● You set the device in master standby mode. Either Cn8 between 2 and 3 or the SDZ pin
were left floating.
● The power supply is down or disconnected from Cn1.
● One or several jumpers are missing on Cn6 or Cn7.
● The serial cable is disconnected from J2.
● The jumper on Cn3 is missing and there is no amperemeter in series.
Figure 9. TS4601B acknowledge pop-up message
Results displayed in Internal Registers window are different from main window
You pressed the read internal registers button in the TS4601B internal registers window,
and results displayed are different from what the main window indicates (see Figure 10).
The main window is not automatically refreshed, therefore, this case can appear if, while the
software is running, you switch the TS4601B power supply OFF and ON or set the TS4601B
to master standby (by setting the pin SDZ to "0") and set it back again to I²C standby (SDZ
to level "1"). When you do this, the TS4601B is reset and all internal registers are set to their
initial value. This is why, when you press the Read Internal Registers button, the result
displayed is quite different from the display in the main window.
Pressing again one of the output mode buttons or just changing the volume is enough to re-
start the TS4601B without closing and re-starting the software.
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