Renesas rl78 User Manual
RL78/G1A
CHAPTER 21 VOLTAGE DETECTOR
Table 21-1. Format of User Option Byte (000C1H/010C1H) (2/2)
Address: 000C1H/010C1H
Note
7 6 5 4 3 2 1 0
VPOC2
VPOC1
VPOC0 1 LVIS1
LVIS0
LVIMDS1
LVIMDS0
<R>
• LVD setting (interrupt mode)
Detection voltage
Option byte setting value
V
LVD
Mode setting
Rising edge Falling edge
VPOC2 VPOC1 VPOC0 LVIS1 LVIS0
LVIMDS1 LVIMDS0
1.67 V
1.63 V
0
0
1
1
1.77 V
1.73 V
0
0
1
0
1.88 V
1.84 V
0
1
1
1
1.98 V
1.94 V
0
1
1
0
2.09 V
2.04 V
0
1
0
1
2.50 V
2.45 V
1
0
1
1
2.61 V
2.55 V
1
0
1
0
2.71 V
2.65 V
1
0
0
1
2.81 V
2.75 V
1
1
1
1
2.92 V
2.86 V
1
1
1
0
3.02 V
2.96 V
1
1
0
1
3.13 V
3.06 V
0
0 1 0 0
0 1
−
Value other than above is setting prohibited.
<R>
• LVD off (use of external reset input via RESET pin)
Detection voltage
Option byte setting value
V
LVD
Mode setting
Rising edge Falling edge
VPOC2 VPOC1 VPOC0 LVIS1 LVIS0
LVIMDS1 LVIMDS0
−
−
1
×
×
×
×
×
1
−
Value other than above is setting prohibited.
Note Set the same value as 000C1H to 010C1H when the boot swap operation is used because 000C1H is replaced
by 010C1H.
Cautions 1. Set bit 4 to 1.
2. After power is supplied, the reset state must be retained until the operating voltage becomes in
the range defined in 29.4 or 30.4 AC Characteristics. This is done by utilizing the voltage
detector or controlling the externally input reset signal. After the power supply is turned off, this
LSI should be placed in the STOP mode, or placed in the reset state by utilizing the voltage
detector or controlling the externally input reset signal, before the voltage falls below the
operating range.
<R>
The range of operating voltage varies with the setting of the user option byte (000C2H or 010C2H).
Remarks 1.
×: don’t care
2. For details on the LVD circuit, see CHAPTER 21 VOLTAGE DETECTOR.
3. The detection voltage is a TYP. value. For details, see 29.6.4 or 30.6.4 LVD circuit characteristics.
R01UH0305EJ0200 Rev.2.00
759
Jul 04, 2013