Renesas H8 Series Hardware Manual

Section 14 Power-On Reset and Low-Voltage Detection Circuits (H8/38124 Group Only)
Rev. 7.00 Mar 10, 2005 page 449 of 652
REJ09B0042-0700
Resistance Value Calculation Table
Ex. No Vref (V) R (kΩ
ΩΩ
Ω) Vreset1 Vint(D) Vint(U) R1 (kΩ
ΩΩ
Ω)R2 (kΩ
ΩΩ
Ω)R3 (kΩ
ΩΩ
Ω)
1 1.30 1000 2.5 2.7 2.9 517 33 450
2 1.41 1000 2.7 2.9 3 514 16 470
3 1.57 1000 3 3.2 3.5 511 42 447
4 2.09 1000 4 4.5 4.7 536 20 444
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
Resistance Value
Error (%)
Vref (V)
R1
(kΩ
ΩΩ
Ω)
R2
(kΩ
ΩΩ
Ω)
R3
(kΩ
ΩΩ
Ω)
5
Comparator
Error (V)
Vreset1
(V)
Vint(D)
(V)
Vint(U)
(V)
1.3 517 33 450 R1+Err, R2/R3-Err 0.1 2.59 2.94 3.15
0 2.49 2.84 3.05
-0.1 2.39 2.74 2.95
R1-Err, R2/R3+Err 0.1 2.59 2.66 2.85
0 2.49 2.56 2.75
-0.1 2.39 2.46 2.65
R1/R2/R3 No Err 0.1 2.59 2.79 2.99
0 2.49 2.69 2.89
-0.1 2.39 2.59 2.79
R1/R2+Err, R3-Err 0.1 2.59 2.93 3.16
0 2.49 2.83 3.06
-0.1 2.39 2.73 2.96
R1/R2-Err, R3+Err 0.1 2.59 2.67 2.84
0 2.49 2.57 2.74
-0.1 2.39 2.47 2.64

Renesas H8 Series Specifications

General

Brand	Renesas
Model	H8 Series
Category	Computer Hardware
Language	English