UPD78F1144AGB-GAH-AX Renesas Electronics America, UPD78F1144AGB-GAH-AX Datasheet - Page 651

• Manufacturer Part Number: UPD78F1144AGB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1144AGB-GAH-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

20.5 Cautions for Low-Voltage Detector
(1) Measures method when supply voltage (V
voltage (V
In a system where the supply voltage (V
voltage (V
Operation example 1: When used as reset
Remark If bit 2 (LVISEL) of the low voltage detection register (LVIM) is set to “1”, the meanings of the above
<Action>
software counter that uses a timer, and then initialize the ports (see Figure 20-11).
After releasing the reset signal, wait for the supply voltage fluctuation period of each system by means of a
The system may be repeatedly reset and released from the reset status.
The time from reset release through microcontroller operation start can be set arbitrarily by the following
action.
LVI
words change as follows.
• Supply voltage (V
• Detection voltage (V
LVI
), the operation is as follows depending on how the low-voltage detector is used.
)
DD
)
LVI
CHAPTER 20 LOW-VOLTAGE DETECTOR
) → Detection voltage (V
→ Input voltage from external input pin (EXLVI)
User’s Manual U17854EJ9V0UD
DD
) fluctuates for a certain period in the vicinity of the LVI detection
DD
) frequently fluctuates in the vicinity of the LVI detection
EXLVI
= 1.21 V)
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