Datasheet

RL78/L12 CHAPTER 25 OPTION BYTE
R01UH0330EJ0200 Rev.2.00 801
Dec 13, 2013
Figure 25-2. Format of User Option Byte (000C1H) (2/2)
Address: 000C1H
7 6 5 4 3 2 1 0
VPOC2 VPOC1 VPOC0 1 LVIS1 LVIS0 LVIMDS1 LVIMDS0
• LVD setting (interrupt mode)
Detection voltage Option byte setting value
VLVD VPOC2 VPOC1 VPOC0 LVIS1 LVIS0 Mode setting
Rising edge Falling edge LVIMDS1 LVIMDS0
1.67 V 1.63 V 0 0 0 1 1 0 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 1 0 0
3.75 V 3.67 V 1 0 0 0
4.06 V 3.98 V 1 1 0 0
Other than above Setting prohibited
• LVD off (by controlling the externally input reset signal on the RESET pin)
Detection voltage Option byte setting value
VLVD VPOC2 VPOC1 VPOC0 LVIS1 LVIS0 Mode setting
Rising edge Falling edge LVIMDS1 LVIMDS0
− −
1
× × × ×
0/1 1
Other than above Setting prohibited
Cautions 1. Be sure to 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 30.4 or 31.4 AC Characteristics. This is done by utilizing the voltage
detection circuit 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 detection circuit or controlling the externally input reset signal, before the voltage falls
below the operating range.
The range of operating voltage varies with the setting of the user option byte (000C2H).
Remarks 1. ×: don’t care
2. For details on the LVD circuit, see CHAPTER 22 VOLTAGE DETECTOR.
3. The detection voltage is a typical value. For details, see 30.6.4 or 31.6.4 LVD circuit characteristics.
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