Renesas H8/38024 Series, Hardware Manual

Page: 466 / 661

Rev. 6.00, 08/04, page 436 of 628
Resistance Value Calculation Table
Ex. No Vref (V) R (k
Ω Ω Ω Ω
) Vreset1 Vint(D) Vint(U) R1 (k
Ω Ω Ω Ω
) R2 (k
Ω Ω Ω Ω
) R3 (k
Ω Ω Ω 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
(k
Ω Ω Ω Ω
)
R2
(k
Ω Ω Ω Ω
)
R3
(k
Ω Ω Ω 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