UPD78F0555MA-FAA-AX Renesas Electronics America, UPD78F0555MA-FAA-AX Datasheet - Page 685

• Manufacturer Part Number: UPD78F0555MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0555MA-FAA-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 9
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0/Kx2-L
22.1 Functions of Low-Voltage Detector
more than or less than the detection level can be checked by reading the low-voltage detection flag (LVIF: bit 0 of LVIM).
occurs. For details of RESF, refer to CHAPTER 20 RESET FUNCTION.
R01UH0028EJ0400 Rev.4.00
Sep 27, 2010
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 LVI circuit compares the supply voltage (V
• 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
• The supply voltage (V
• A reset or an interrupt can be selected to be generated after detection by software.
• Detection levels (V
• Operable in STOP mode.
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 pin is
When the low-voltage detector is used to reset, bit 0 (LVIRF) of the reset control flag register (RESF) is set to 1 if reset
≥ V
external input pin (EXLVI) with the LVI detection voltage (V
internal interrupt signal.
supply from the POC detection voltage (V
the supply voltage (V
generated when the supply voltage (V
software.
Remark Level detection of input voltage from external input pin (EXLVI) is available only in 78K0/KB2-L and
Selection of Level Detection of Supply Voltage (V
LVI
.
DD
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
DD
) < the LVI detection voltage (V
) or the input voltage from the external input pin (EXLVI) can be selected to be detected by
Generates an internal interrupt
signal when V
than V
V
(V
Selects interrupt (LVIMD = 0).
DD
DD
becomes V
≥ V
CHAPTER 22 LOW-VOLTAGE DETECTOR
LVI
LVI
(V
).
DD
DD
< V
DD
LVI
drops lower
LVI
) < the LVI detection voltage (V
or higher
) or when
POR
DD
)
= 1.61 V (TYP.)) or lower, the internal reset signal is generated when
DD
) with the LVI detection voltage (V
Generates an internal reset
signal when EXLVI < V
and releases the reset signal
when EXLVI ≥ V
Selects reset (LVIMD = 1).
LVI
EXLVI
= 1.91 V ±0.1 V). After that, the internal reset signal is
Selection Level Detection of Input Voltage from
= 1.21 V ±0.1 V), and generates an internal reset or
External Input Pin (EXLVI) (LVISEL = 1)
CHAPTER 22 LOW-VOLTAGE DETECTOR
EXLVI
LVI
.
= 1.91 V ±0.1 V).
EXLVI
Generates an internal interrupt
signal when EXLVI drops
lower than V
V
becomes V
(EXLVI ≥ V
Selects interrupt (LVIMD = 0).
LVI
EXLVI
) or the input voltage from an
) or when EXLVI
EXLVI
EXLVI
EXLVI
).
or higher
(EXLVI <
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