UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 622

• Manufacturer Part Number: UPD78F0550MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0550MA-FAA-AX

• Package / Case: *
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 10MHz
• Number Of I /o: 12
• Core Processor: 78K/0
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Peripherals: LVD, POR, PWM, WDT
• Connectivity: I²C, LIN, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

22.1 Functions of Low-Voltage Detector
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).
reset occurs. For details of RESF, refer to CHAPTER 20 RESET FUNCTION.
622
Generates an internal reset
signal when V
releases the reset signal when
V
DD
Selects reset (LVIMD = 1).
The low-voltage detector (LVI) is mounted onto all 78K0/Kx2-L microcontroller products.
The low-voltage detector has the following functions.
The reset and interrupt signals are generated as follows depending on selection by software.
Remark LVISEL: Bit 2 of low-voltage detection register (LVIM)
While the low-voltage detector is operating, whether the supply voltage or the input voltage from an external input
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 LVI circuit compares the supply voltage (V
an external input pin (EXLVI) with the LVI detection voltage (V
internal reset or internal interrupt signal.
The low-voltage detector (LVI) can be set to ON by an option byte by default. If it is set to ON to raise the power
supply from the POC detection voltage (V
when the supply voltage (V
signal is generated when the supply voltage (V
The supply voltage (V
by software.
A reset or an interrupt can be selected to be generated after detection by software.
Detection levels (V
Operable in STOP mode.
Note
Remark Level detection of input voltage from external input pin (EXLVI) is available only in 78K0/KB2-L and
V
Selection of Level Detection of Supply Voltage (V
LVI
.
DD
This is a preliminary value and subject to change.
LVIMD: Bit 1 of LVIM
< V
78K0/KC2-L.
LVI
and
(LVISEL = 0)
LVI
,16 levels) of supply voltage can be changed by software.
DD
) or the input voltage from the external input pin (EXLVI) can be selected to be detected
Generates an internal interrupt
signal when V
than V
V
(V
Selects interrupt (LVIMD = 0).
DD
DD
CHAPTER 22 LOW-VOLTAGE DETECTOR
DD
becomes V
) < the LVI detection voltage (V
LVI
V
LVI
(V
).
DD
Preliminary User’s Manual U19111EJ2V1UD
DD
< V
LVI
drops lower
LVI
or higher
) or when
POR
DD
)
DD
= 1.61 V (TYP.)) or lower, the internal reset signal is generated
DD
) < the LVI detection voltage (V
) with the LVI detection voltage (V
Generates an internal reset
signal when EXLVI < V
and releases the reset signal
when EXLVI
Selects reset (LVIMD = 1).
LVI
Selection Level Detection of Input Voltage from
= 1.91 V 0.1 V
External Input Pin (EXLVI) (LVISEL = 1)
EXLVI
V
EXLVI
= 1.21 V 0.1 V
.
EXLVI
Note
LVI
). After that, the internal reset
= 1.91 V 0.1 V
Generates an internal interrupt
signal when EXLVI drops
lower than V
V
becomes V
(EXLVI
LVI
Selects interrupt (LVIMD = 0).
EXLVI
) or the input voltage from
) or when EXLVI
Note
), and generates an
V
EXLVI
EXLVI
EXLVI
).
or higher
Note
(EXLVI <
).