upd78f0124hgba1-8et-a Renesas Electronics Corporation., upd78f0124hgba1-8et-a Datasheet - Page 372

• Manufacturer Part Number: upd78f0124hgba1-8et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

22.1 Functions of Low-Voltage Detector
reset occurs. For details of RESF, see CHAPTER 19 RESET FUNCTION.
22.2 Configuration of Low-Voltage Detector
372
The low-voltage detector (LVI) has following functions.
• Compares supply voltage (V
• Detection levels (nine levels) of supply voltage can be changed by software.
• Interrupt or reset function can be selected by software.
• Operable in STOP mode.
When the low-voltage detector is used to reset, bit 0 (LVIRF) of the reset control flag register (RESF) is set to 1 if
The block diagram of the low-voltage detector is shown below.
V
internal reset signal when V
DD
Low-voltage detection level
selection register (LVIS)
Figure 22-1. Block Diagram of Low-Voltage Detector
CHAPTER 22 LOW-VOLTAGE DETECTOR
DD
DD
< V
Reference
) and detection voltage (V
voltage
source
LVI
.
N-ch
Internal bus
+
−
User’s Manual U16962EJ3V0UD
V
DD
LVI
Low-voltage detection register
(LVIM)
), and generates an internal interrupt signal or
INTLVI
Internal reset signal