HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 549

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

15.5 Interrupts
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 Usage Notes
When using the A/D converter, note the following points:
1. Analog Input Voltage Range: During A/D conversion, the voltages input to the analog input
2.
3.
4. Analog voltage
5.
pins should be in the range AV
Relationships of AV
related as follows: AV
converter is not used.
V
range V
When using an A/D converter, make the following voltage settings.
(1) V
(2) AV
(N = 0 to 7)
Note: Restriction for the ZTAT
Failure to observe points 1, 2, 3, and 4 above may degrade chip reliability.
Note on Board Design: In board layout, separate the digital circuits from the analog circuits
as much as possible. Particularly avoid layouts in which the signal lines of digital circuits
cross or closely approach the signal lines of analog circuits. Induction and other effects may
cause the analog circuits to operate incorrectly, or may adversely affect the accuracy of A/D
conversion.
The analog input signals (AN
voltage (AV
analog ground (AV
the board.
REF
CC
Programming Range: The reference voltage input at the V
CC
REF
Memory version and Mask ROM version can be used regularly without restriction.
≥ AV
≥ V
CC
≤ AV
CC
REF
) must be separated from digital circuits by the analog ground (AV
- 0.3V
CC
≥ ANn ≥ AV
SS
CC
.
) should be connected to a stable digital ground (V
SS
and AV
= V
SS
0
SS
SS
SS
. AV
to AN
TM
≤ AN
to V
= V
CC
version only; The S Mask version of ZTAT
7
SS
CC
), analog reference voltage (V
and AV
n
≤ V
and V
539
REF
SS
SS
.
must not be left open, even if the A/D
: AV
CC
, AV
SS
, V
REF
CC
REF
pin should be in the
, and V
), and analog supply
SS
) at one point on
SS
TM
should be
SS
, the Flash
). The