IBM nec pd78082 User Manual

The A/D converter operates on the main system clock.  Therefore, its operation stops in STOP mode.  As a

current still flows in the AV

REF

 pin at this time, this current must be cut in order to minimize the overall system

power dissipation.  In Figure 10-9, the power dissipation can be reduced by outputting a low-level signal to

the output port in standby mode.  However, there is no precision to the actual AV

REF

 voltage, and therefore

the conversion values themselves lack precision and can only be used for relative comparison.

The input voltages of ANI0 to ANI7 should be within the specification range.  In particular, if a voltage above

AV

REF

 or below AV

SS

 is input (even if within the absolute maximum rating range), the conversion value for that

channel will be indeterminate.  The conversion values of the other channels may also be affected.

Series Resistor String

V

DD

AV

REF

AV

REF

 = V

DD

AV

SS

Output Port

.

 .

µ