UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 252

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

16.1 Functions of Low-Voltage Detector
reset occurs. For details of RESF, refer to CHAPTER 14 RESET FUNCTION.
16.2 Configuration of Low-Voltage Detector
252
The low-voltage detector (LVI) has following functions.
• Compares supply voltage (V
• Detection levels (ten 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 in Figure 16-1.
V
DD
internal reset signal when V
Low-voltage detection
level select register (LVIS)
Figure 16-1. Block Diagram of Low-Voltage Detector
CHAPTER 16 LOW-VOLTAGE DETECTOR
DD
voltage source
DD
< V
Reference
) and detection voltage (V
LVI
.
N-ch
+
−
V
User’s Manual U16898EJ5V0UD
DD
LVI
Low-voltage detect
register (LVIM)
), and generates an internal interrupt signal or
INTLVI
Internal reset signal