M-V850E-IA4 Renesas Electronics America, M-V850E-IA4 Datasheet - Page 540

• Manufacturer Part Number: M-V850E-IA4
• Description: KIT EVAL V850E IA4 UPD70F3186
• Manufacturer: Renesas Electronics America

Specifications of M-V850E-IA4

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12.8 Internal Equivalent Circuit
538
The following figure shows the equivalent circuit of the analog input block.
Remarks 1. The maximum values are shown (reference values).
Caution A/D converters 0 and 1 perform the first sampling when A/D conversion starts after A/D
ADAnFR1 Bit
Sampling voltage
initialization. Sampling power is almost fully charged during this period. Therefore, the
sampling error can be calculated under this condition. After that, the converters perform the
second sampling to correct the error.
The sampling period of A/D converters 0 and 1 is from the start of conversion to the end of the
second sampling period. Avoid noise during this period.
2. n = 0, 1
Trigger input
ADAnM1 Register
0
1
1
m = 0 to 3
Only the ANI00 and ANI01 pins can be used when A/D converter 0 of the V850E/IA3 is used.
acknowledgment
Number of
trigger
clocks
ADAnFR0 Bit
initialization
Number of
1
0
1
clocks
Figure 12-23. ANInm Pin Internal Equivalent Circuit
A/D
CHAPTER 12 A/D CONVERTERS 0 AND 1
4.0 kΩ
ANInm
first sampling
R
Number of
Initialization Clocks
clocks
Total number of A/D conversion clocks
Number of A/D
User’s Manual U16543EJ4V0UD
4
6
8
Number of conversion clocks
15 pF
C
C
1
1
R
second sampling
Number of
Sampling Clocks
clocks
Number of First
C
2
36
54
72
5.7 pF
C
2
INTADn interrupt request
signal generation
Time
Number of Second
Sampling Clocks
36
54
72