HD64F38024HV Datasheet, PDF (545/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 16 Electrical Characteristics
Table 16.31 Power Supply Voltage Detection Circuit Characteristics (4)
Using external reference voltage and ladder resistor (VREFSEL = 1, VINTDSEL = VINTUSEL =
0)
Item
Symbol Min
Rated Values
Typ
Max
Test
Unit Condition
Power supply drop Vint(D)^*1 3.08 * (Vref1 – 0.1) 3.08 * Vref1 3.08 * (Vref1 + 0.1) V
detection voltage
LVDSEL = 0
Vref input voltage Vref1^*2 0.98
(Vint(D))
—
1.68
V Vint(D)
Power supply rise Vint(U)^*1 3.33 * (Vref2 – 0.1) 3.33 * Vref2 3.33 * (Vref2 + 0.1) V
detection voltage
LVDSEL = 0
Vref input voltage Vref2^*2 0.91
(Vint(U))
—
1.55
V Vint(U)
Reset detection
voltage 1
Vreset1^*1 1.91 * (Vref3 – 0.1) 1.91 * Vref3 1.91 * (Vref3 + 0.1) V LVDSEL = 0
Vref input voltage
(Vreset1)
Reset detection
voltage 2
Vref3^*2 0.89
—
2.77
V
Vreset2^*1 2.76 * (Vref4 – 0.1) 2.76 * Vref4 2.76 * (Vref4 + 0.1) V
Vreset1
LVDSEL = 1
Vref input voltage Vref4^*2 1.08
(Vreset2)
—
1.89
V Vreset2
Notes: 1. The values of Vint(D), Vint(U), Vreset1, and Vreset2 change relative to each other.
Example: If Vint(D) is the minimum value, Vint(U), Vreset1, and Vreset2 are also the
minimum values.
2. The Vref input voltage is calculated using the following formula.
2.7 V (= VCC min)
1.5 V (= RAM retention voltage)
< Vint(D), Vint(U), Vreset2
< Vreset1
< 5.5 V (= VCC max)
< 5.5 V (= VCC max)
Vref1: 2.7 < 3.08 * (Vref1 – 0.1), 3.08 * (Vref1 + 0.1) < 5.5 → 0.98 < Vref1 < 1.68
Vref2: 2.7 < 3.33 * (Vref2 – 0.1), 3.33 * (Vref2 + 0.1) < 5.5 → 0.91 < Vref2 < 1.55
Vref3: 1.5 < 1.91 * (Vref3 – 0.1), 1.91 * (Vref3 + 0.1) < 5.5 → 0.89 < Vref3 < 2.77
Vref4: 2.7 < 2.76 * (Vref4 – 0.1), 2.76 * (Vref4 + 0.1) < 5.5 → 1.08 < Vref4 < 1.89
Rev. 8.00 Mar. 09, 2010 Page 523 of 658
REJ09B0042-0800