HD6473847RHV Datasheet, PDF (468/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 17 Electrical Characteristics
Table 17.25 Power Supply Voltage Detection Circuit Characteristics (4)
Using external reference voltage and ladder resistor (VREFSEL = 1, VINTDSEL = VINTUSEL =
0)
Item
Test
Symbol Condition Min
Rated Values
Typ
Max
Unit
Power supply drop Vint(D) ^*1 LVDSEL = 0 3.08 * (Vref1 – 0.1) 3.08 * Vref1 3.08 * (Vref1 + 0.1) V
detection voltage
Vref input voltage Vref1^*2 Vint(D)
0.98
—
1.68
V
(Vint(D))
Power supply rise Vint(U) ^*1 LVDSEL = 0 3.33 * (Vref2 – 0.1) 3.33 * Vref2 3.33 * (Vref2 + 0.1) V
detection voltage
Vref input voltage Vref2^*2 Vint(U)
0.91
—
1.55
V
(Vint(U))
Reset detection
voltage 1
Vreset1^*1 LVDSEL = 0 1.91 * (Vref3 – 0.1) 1.91 * Vref3 1.91 * (Vref3 + 0.1) V
Vref input voltage Vref3^*2 Vreset1
0.89
—
2.77
V
(Vreset1)
Reset detection
voltage 2
Vreset2^*1 LVDSEL = 1 2.76 * (Vref4 – 0.1) 2.76 * Vref4 2.76 * (Vref4 + 0.1) V
Vref input voltage Vref4^*2 Vreset2
1.08
—
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 (= V_CC min)
1.5 V (= RAM retention voltage)
< Vint(D), Vint(U), Vreset2
< Vreset1
< 5.5 V (= V_CC max)
< 5.5 V (= V_CC 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. 7.00 Mar. 08, 2010 Page 436 of 510
REJ09B0024-0700