upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 368

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

21.1 Functions of Low-Voltage Detector
reset occurs. For details of RESF, refer to CHAPTER 18 RESET FUNCTION.
21.2 Configuration of Low-Voltage Detector
368
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
V
DD
Expanded-specification product of standard products and (A) grade products: 8 levels
Conventional product of standard products and (A) grade products:
(A1) grade products and (A2) grade products:
Note
of supply voltage can be changed by software.
Low-voltage detection level
selection register (LVIS)
Figure 21-1. Block Diagram of Low-Voltage Detector
CHAPTER 21 LOW-VOLTAGE DETECTOR
DD
DD
< V
voltage source
) and detection voltage (V
Detection
LVI
.
N-ch
Internal bus
User’s Manual U16227EJ3V0UD
V
DD
LVI
), and generates an internal interrupt signal or
Low-voltage detection register
(LVIM)
7 levels
5 levels
Internal reset signal
INTLVI