m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 262

• Manufacturer Part Number: m30833fjgp
• Description: Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
• Manufacturer: Renesas Electronics Corporation.

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Figure 17.9 Analog Input Pin and External Sensor Equivalent Circuit
0
2
17.2.8 Power Consumption Reducing Function
17.2.9 Analog Input Pin and External Sensor Equivalent Circuit
1
9
C
3 .
B
When the A/D converter is not used, the VCUT bit in the ADiCON1 register (i=0, 1) isolates the resistor
ladder of the A/D converter from the reference voltage input pin (V
shutting off any current flow into the resistor ladder from the V
When using the A/D converter, set the VCUT bit to "1" (V
the ADiCON0 register to "1" (A/D conversion started). Do not set the ADST bit and VCUT bit to "1"
simultaneously, nor set the VCUT bit to "0" (no V
bit does not affect the V
Figure 17.9 shows an example of the analog input pin and external sensor equivalent circuit.
8 /
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1
0
3
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4
a
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3 .
1
Sensor equivalent
u
circuit
, 1
3
V
p
1
IN
2
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0
3
6
2
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Page 239
8 /
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, 3
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REF
3
2
C
f o
performance of the D/A converter.
Microcomputer
8 /
4
R (7.8k )
3
8
C (2.0pF)
8
) T
V
C
REF
connection) during the A/D conversion. The VCUT
Sample and hold function is disabled :
Sampling time
(the time needed until the capacitor is fully
charged after closing switch)
Sample and hold function is enabled :
REF
connection) before setting the ADST bit in
REF
REF
pin.
). Power consumption is reduced by
17. A/D Converter
3
AD
2
AD