UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 547

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

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24.2 Configuration of Low-Voltage Detector
24.3 Registers Controlling Low-Voltage Detector
(1) Low-voltage detection register (LVIM)
V
DD
The block diagram of the low-voltage detector is shown in Figure 24-1.
The low-voltage detector is controlled by the following registers.
• Low-voltage detection register (LVIM)
• Low-voltage detection level selection register (LVIS)
• Port mode register 12 (PM12)
This register sets low-voltage detection and the operation mode.
This register can be set by a 1-bit or 8-bit memory manipulation instruction.
The generation of a reset signal other than an LVI reset clears this register to 00H.
Low-voltage detection level
selection register (LVIS)
EXLVI/P120/
INTP0
Figure 24-1. Block Diagram of Low-Voltage Detector
CHAPTER 24 LOW-VOLTAGE DETECTOR
User’s Manual U17260EJ6V0UD
Reference
voltage
source
Internal bus
N-ch
+
−
V
DD
Low-voltage detection register
(LVIM)
Internal reset signal
INTLVI
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