HD6432646 Hitachi, HD6432646 Datasheet - Page 638
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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16.5
The A/D converter generates an A/D conversion end interrupt (ADI) at the end of A/D conversion.
ADI interrupt requests can be enabled or disabled by means of the ADIE bit in ADCSR.
The DTC can be activated by an ADI interrupt. Having the converted data read by the DTC in
response to an ADI interrupt enables continuous conversion to be achieved without imposing a
load on software.
The A/D converter interrupt source is shown in table 16-6.
Table 16-6 A/D Converter Interrupt Source
Interrupt Source
ADI
16.6
The following points should be noted when using the A/D converter.
Setting Range of Analog Power Supply and Other Pins:
(1) Analog input voltage range
(2) Relation between AV
(3) V
If conditions (1), (2), and (3) above are not met, the reliability of the device may be adversely
affected.
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.
604
The voltage applied to analog input pin ANn during A/D conversion should be in the range
AV
As the relationship between AV
set AV
The analog reference voltage input at the V
ref
SS
input range
Interrupts
Usage Notes
ANn V
CC
= V
CC
ref
, and do not leave the AV
.
Description
Interrupt due to end of conversion
CC
, AV
SS
and V
SS
and V
CC
, V
SS
CC
SS
, set AV
ref
and AV
pin set in the range V
SS
SS
= V
pins open or no account.
SS
. If the A/D converter is not used,
DTC Activation
Possible
ref
AV
CC
.
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