UPD78F1211GB-GAF-AX Renesas Electronics America, UPD78F1211GB-GAF-AX Datasheet - Page 929

• Manufacturer Part Number: UPD78F1211GB-GAF-AX
• Description: MCU 16BIT 78K0R/LX3 44-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Ix3r

Specifications of UPD78F1211GB-GAF-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 40MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

21.1 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, see CHAPTER 19 RESET FUNCTION.
Selects reset (LVIMD = 1).
Generates an internal reset
signal when V
releases the reset signal when
V
DD
The low-voltage detector (LVI) has the following functions.
• The LVI circuit compares the supply voltage (V
• 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
When the low-voltage detector is used to reset, bit 0 (LVIRF) of the reset control flag register (RESF) is set to 1 if
≥ V
external input pin (EXLVI) with the detection voltage (V
internal interrupt signal.
by software.
Selection of Level Detection of Supply Voltage (V
LVI
.
DD
LVIMD: Bit 1 of LVIM
< V
LVI
and
(LVISEL = 0)
LVI
,10 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
Selects interrupt (LVIMD = 0).
Generates an internal interrupt
signal when V
than V
V
(V
DD
DD
CHAPTER 21 LOW-VOLTAGE DETECTOR
becomes V
≥ V
LVI
LVI
(V
).
DD
DD
< V
LVI
drops lower
User’s Manual U19678EJ1V1UD
LVI
or higher
) or when
DD
)
DD
) with the detection voltage (V
Selects reset (LVIMD = 1).
Generates an internal reset
signal when EXLVI < V
and releases the reset signal
when EXLVI ≥ V
EXLVI
= 1.21 V ±0.1 V), and generates an internal reset or
Selection Level Detection of Input Voltage from
External Input Pin (EXLVI) (LVISEL = 1)
EXLVI
.
EXLVI
LVI
) or the input voltage from an
Selects interrupt (LVIMD = 0).
Generates an internal interrupt
signal when EXLVI drops
lower than V
V
becomes V
(EXLVI ≥ V
EXLVI
) or when EXLVI
EXLVI
EXLVI
EXLVI
).
or higher
(EXLVI <
927