UPD78F1144AGB-GAH-AX Renesas Electronics America, UPD78F1144AGB-GAH-AX Datasheet - Page 638

• 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: -

20.4 Operation of Low-Voltage Detector
(1) Used as reset (LVIMD = 1)
(2) Used as interrupt (LVIMD = 0)
pin is more than or less than the detection level can be checked by reading the low-voltage detection flag (LVIF: bit 0
of LVIM).
636
The low-voltage detector can be used in the following two modes.
While the low-voltage detector is operating, whether the supply voltage or the input voltage from an external input
• If LVISEL = 0, compares the supply voltage (V
• If LVISEL = 1, compares the input voltage from external input pin (EXLVI) and detection voltage (V
• If LVISEL = 0, compares the supply voltage (V
• If LVISEL = 1, compares the input voltage from external input pin (EXLVI) and detection voltage (V
Remark LVIMD: Bit 1 of low-voltage detection register (LVIM)
signal when V
generates an internal reset signal when EXLVI < V
Remark The low-voltage detector (LVI) can be set to ON by an option byte by default. If it is set to ON to
V
V ±0.1 V). When EXLVI drops lower than V
(EXLVI ≥ V
LVI
(V
DD
LVISEL: Bit 2 of LVIM
< V
raise the power supply from the POC detection voltage or lower, the internal reset signal is
generated when the supply voltage (V
internal reset signal is generated when the supply voltage (V
±0.1 V).
EXLVI
LVI
DD
) or when V
), generates an interrupt signal (INTLVI).
< V
LVI
, and releases internal reset when V
DD
becomes V
CHAPTER 20 LOW-VOLTAGE DETECTOR
User’s Manual U17854EJ9V0UD
LVI
or higher (V
EXLVI
DD
DD
DD
) and detection voltage (V
EXLVI
(EXLVI < V
) and detection voltage (V
) < detection voltage (V
, and releases internal reset when EXLVI ≥ V
DD
≥ V
DD
≥ V
LVI
EXLVI
), generates an interrupt signal (INTLVI).
LVI
) or when EXLVI becomes V
.
DD
LVI
) < detection voltage (V
LVI
= 2.07 V ±0.2 V). After that, the
LVI
). When V
), generates an internal reset
DD
drops lower than
EXLVI
LVI
EXLVI
EXLVI
or higher
= 2.07 V
.
= 1.21
EXLVI
),