HD6412350 Hitachi, HD6412350 Datasheet - Page 657

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

15.5
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 or DMAC can be activated by an ADI interrupt. Having the converted data read by the
DTC or DMAC 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 15-5.
Table 15-5 A/D Converter Interrupt Source
Interrupt Source
ADI
15.6
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.
The voltage applied to analog input pins AN0 to AN7 during A/D conversion should be in the
range AV
As the relationship between AV
not used, the AV
The analog reference voltage input at the V
ref
input range
Interrupts
Usage Notes
SS
ANn
CC
and AV
Description
Interrupt due to end of conversion
CC
V
, AV
ref
.
SS
SS
pins must on no account be left open.
and V
CC
, AV
CC
SS
, V
and V
SS
ref
pin set in the range V
CC
, V
SS
, set AV
SS
= V
DTC or DMAC Activation
Possible
ref
SS
. If the A/D converter is
AV
CC
.
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