HD6473847RHV Datasheet, PDF (388/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 14 Power-On Reset and Low-Voltage Detection Circuits (H8/38104 Group Only)
Resistance Value Calculation Table
Ex. No
1
2
3
4
Vref (V)
1.30
1.41
1.57
2.09
R (kΩ)
1000
1000
1000
1000
Vreset1
2.5
2.7
3
4
Vint(D)
2.7
2.9
3.2
4.5
Vint(U)
2.9
3
3.5
4.7
R1 (kΩ)
517
514
511
536
R2 (kΩ)
33
16
42
20
R3 (kΩ)
450
470
447
444
4. Using an error calculation table like the one shown below, plug in values for R1, R2, R3, and
Vref to calculate the deviation of Vreset1, Vint(D), and Vint(U). Make sure to double check
the maximum and minimum values for each value.
Error Calculation Table
R1
Vref (V) (kΩ)
1.3
517
R2
(kΩ)
33
R3
(kΩ)
450
Resistance Value
Error (%)
5
Comparator Vreset1
Error (V)
(V)
Vint(D)
(V)
R1+Err, R2/R3-Err 0.1
2.59
2.94
0
2.49
2.84
-0.1
2.39
2.74
R1-Err, R2/R3+Err 0.1
2.59
2.66
0
2.49
2.56
-0.1
2.39
2.46
R1/R2/R3 No Err 0.1
2.59
2.79
0
2.49
2.69
-0.1
2.39
2.59
R1/R2+Err, R3-Err 0.1
2.59
2.93
0
2.49
2.83
-0.1
2.39
2.73
R1/R2-Err, R3+Err 0.1
2.59
2.67
0
2.49
2.57
-0.1
2.39
2.47
Vint(U)
(V)
3.15
3.05
2.95
2.85
2.75
2.65
2.99
2.89
2.79
3.16
3.06
2.96
2.84
2.74
2.64
Rev. 7.00 Mar. 08, 2010 Page 356 of 510
REJ09B0024-0700