HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 382

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

15.5
The A/D converter generates an interrupt (ADI) at the end of A/D conversion. The ADI interrupt
request can be enabled or disabled by the ADIE bit in ADCSR.
15.6
When using the A/D converter, note the following points.
Setting Ranges of Analog Power Supply and Other Pins:
1. Analog Input Voltage Range
2. AV
3. AV
Notes on Board Design: In board design, digital circuitry and analog circuitry should be as
mutually isolated as possible, and layout in which digital circuit signal lines and analog circuit
signal lines cross or are in close proximity should be avoided as far as possible. Failure to do so
may result in incorrect operation of the analog circuitry due to inductance, adversely affecting A/D
conversion values.
Also, digital circuitry must be isolated from the analog input signals (AN
reference voltage (AV
analog ground (AV
board.
Notes on Noise Countermeasures: A protection circuit connected to prevent damage due to an
abnormal voltage such as an excessive surge at the analog input pins (AN
reference power supply pin (AV
figure 15.7.
Also, the bypass capacitors connected to AV
AN
If a filter capacitor is connected as shown in figure 15.7, the input currents at the analog input pins
(AN
frequently, as in scan mode, if the current charged and discharged by the capacitance of the
sample-and-hold circuit in the A/D converter exceeds the current input via the input impedance
350
During A/D conversion, the voltages input to the analog input pins AN
AV
AV
and AV
The analog reference voltage input at the AV
A/D converter is not used, the value should be AV
7
0
must be connected to AV
to AN
SS
CC
SS
ref
should be equal to V
Input Range
and AV
Interrupts
Application Notes
SS
AN
7
) are averaged, and so an error may arise. Also, when A/D conversion is performed
= V
n
SS
SS
AV
SS
Input Voltages
) should be connected to a stable digital ground (V
ref
ref
. (n = 0 to 7)
), and analog power supply (AV
SS
SS
. If the A/D converter is not used, the values should be AV
.
ref
) should be connected between AV
CC
, AV
ref
pin should be in the range AV
ref
and the filter capacitor connected to AN
ref
CC
= V
) by the analog ground (AV
CC
.
CC
and AV
SS
0
) at one point on the
0
n
to AN
to AN
should be in the range
SS
7
7
ref
), analog
as shown in
) or analog
AV
SS
). The
CC
CC
. If the
= V
0
to
CC