Renesas rl78 User Manual
RL78/G1A
CHAPTER 11 A/D CONVERTER
R01UH0305EJ0200 Rev.2.00
399
Jul 04, 2013
(10) Internal equivalent circuit
The equivalent circuit of the analog input block is shown below.
Figure 11-46. Internal Equivalent Circuit of ANIn Pin
ANIn
C1
C2
R1
Table 11-4. Resistance and Capacitance Values of Equivalent Circuit (Reference Values)
AV
DD
ANIn
pin
R1[k
Ω] C1[pF] C2[pF]
ANI0 to ANI12
7.4
8
6.3
2.4 V
≤ AV
DD
≤ 3.6 V
ANI16 to ANI30
12.3
8
7.4
ANI0 to ANI12
11
8
6.3
1.8 V
≤ AV
DD
≤ 3.6 V
ANI16 to ANI30
41
8
7.4
ANI0 to ANI12
510
8
6.3
1.6 V
≤ AV
DD
≤ 3.6 V
ANI16 to ANI30
650
8
7.4
Remark The resistance and capacitance values shown in Table 11-4 are not guaranteed values.
(11) Starting the A/D converter
Start the A/D converter after the AV
REFP
and AV
DD
voltages stabilize.