參數(shù)資料
型號: μPD789197
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 95/146頁
文件大?。?/td> 630K
代理商: ΜPD789197
Preliminary Product Information
95
μ
PD789186, 789187, 789196, 789197
6.10 Low-Voltage Indicator (LVI)
6.10.1 Low-voltage indicator function
The low-voltage indicator detects power supply voltage increases and decreases.
A power supply voltage decrease is detected when T
A
= -40
°
C to +85
°
C and V
DD
= 3.55 to 4.45 V. However, an
abrupt power supply voltage change cannot be detected.
The result of a comparison made between a power supply voltage and detected voltage can be read using an
instruction.
Based on the result of a comparison made between a power supply voltage and detected voltage, an interrupt
request signal can be generated.
6.10.2 Low-voltage indicator configuration
Figure 6-45. Block Diagram of Low-Voltage Indicator
V
DD
P-ch
INTLVI0
+
Power supply
subject to
detection
Low-voltage indicator
register 0 (LVI0)
Internal bus
LVION0
LVIOUT0
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