HD6417034B RENESAS [Renesas Technology Corp], HD6417034B Datasheet - Page 453

• Manufacturer Part Number: HD6417034B
• Description: 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

14.7
When using the A/D converter, note the points listed in section 14.7.1 below.
14.7.1
14.7.2
To prevent damage from voltage surges at the analog input pins (AN0–AN7), connect an input
protection circuit like the one shown in figure 14.8. The circuit shown also includes an RC filter to
prevent errors due to noise. This circuit is shown as an example: The circuit constants should be
selected according to actual application conditions. Table 14.5 list the analog input pin
specifications and figure 14.9 shows an equivalent circuit diagram of the analog input ports.
Analog Input Voltage Range: During A/D conversion, the voltages input to the analog input
pins ANn should be in the range AV
Relationships of AV
related as follows: AV
AV
AV
AV
When the converter is neither in use nor in standby mode, connect AV
power voltage (V
CC
ref
ref
A/D Converter Usage Notes
Setting Analog Input Voltage
Input Range: The analog reference voltage input at the AV
≤ AV
Handling of Analog Input Pins
= V
Note: *
CC
CC
and AV
. If the converter is not used, set AV
Figure 14.8 Example of Analog Input Protection Circuit
*
CC
10 F
).
CC
*
SS
CC
and AV
= V
= V
SS
CC
0.01 F
.
SS
0.1 F
100
± 10% and AV
to V
SS
CC
≤ ANn ≤ AV
and V
AV
AV
AN0–AN7
AV
SS
SS
CC
ref
SS
: AV
= V
ref
ref
= V
Rev. 7.00 Jan 31, 2006 page 427 of 658
.
SS
CC
SuperH microcomputer
. If the A/D converter is not used, set
CC
, AV
.
SS
, V
ref
pin should be in the range
CC
Section 14 A/D Converter
CC
and V
and AV
REJ09B0272-0700
SS
should be
ref
to the