hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 569

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

Table 16.30 Power Supply Voltage Detection Circuit Characteristics (4)
Using external reference voltage and ladder resistor (VREFSEL = 1, VINTDSEL = VINTUSEL =
0)
Item
Notes:
Power supply drop
detection voltage
Vref input voltage
(Vint(D))
Power supply rise
detection voltage
Vref input voltage
(Vint(U))
Reset detection
voltage 1
Vref input voltage
(Vreset1)
Reset detection
voltage 2
Vref input voltage
(Vreset2)
1. The values of Vint(D), Vint(U), Vreset1, and Vreset2 change relative to each other.
2. The Vref input voltage is calculated using the following formula.
Example:
2.7 V (= V
1.5 V (= RAM retention voltage)
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
Symbol
Vint(D) *
Vref1 *
Vint(U) *
Vref2 *
Vreset1 *
Vref3 *
Vreset2 *
Vref4 *
CC
If Vint(D) is the minimum value, Vint(U), Vreset1, and Vreset2 are also the
minimum values.
min)
2
2
2
2
1
1
1
1
Min
3.08 * (Vref1
0.98
3.33 * (Vref2
0.91
1.91 * (Vref3
0.89
2.76 * (Vref4
1.08
–
–
–
–
0.1)
0.1)
0.1)
0.1)
< Vint(D), Vint(U), Vreset2
< Vreset1
Typ
Rated Values
3.08 * Vref1
—
3.33 * Vref2
—
1.91 * Vref3
—
2.76 * Vref4
—
Rev. 7.00 Mar 10, 2005 page 527 of 652
Max
3.08 * (Vref1 + 0.1)
1.68
3.33 * (Vref2 + 0.1)
1.55
1.91 * (Vref3 + 0.1)
2.77
2.76 * (Vref4 + 0.1)
1.89
Section 16 Electrical Characteristics
< 5.5 V (= V
< 5.5 V (= V
REJ09B0042-0700
Unit
V
V
V
V
V
V
V
V
CC
CC
max)
max)
Test
Condition
LVDSEL = 0
Vint(D)
LVDSEL = 0
Vint(U)
LVDSEL = 0
Vreset1
LVDSEL = 1
Vreset2