upd78f0124m6gba1-8et Renesas Electronics Corporation., upd78f0124m6gba1-8et Datasheet - Page 378

• Manufacturer Part Number: upd78f0124m6gba1-8et
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

22.1 Functions of Low-Voltage Detector
reset occurs. For details of RESF, refer to CHAPTER 19 RESET FUNCTION.
22.2 Configuration of Low-Voltage Detector
378
The low-voltage detector (LVI) has the following functions.
• Compares supply voltage (V
• Detection levels
• Interrupt or reset function can be selected by software.
• Operable in STOP mode.
Note Detection levels of supply voltage differ as follows.
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.
internal reset signal when V
Expanded-specification products of standard products and (A) grade products: 8 levels
Conventional products of standard products and (A) grade products:
(A1) grade products and (A2) grade products:
V
DD
Note
of supply voltage can be changed by software.
Low-voltage detection level
selection register (LVIS)
Figure 22-1. Block Diagram of Low-Voltage Detector
DD
DD
< V
) and detection voltage (V
voltage source
LVI
Detection
.
CHAPTER 22 LOW-VOLTAGE DETECTOR
N-ch
Internal bus
User’s Manual U16315EJ3V1UD
+
−
V
DD
LVI
), and generates an internal interrupt signal or
Low-voltage detection register
(LVIM)
7 levels
5 levels
Internal reset signal
INTLVI