UPD78F0551MA-FAA-AX Renesas Electronics America, UPD78F0551MA-FAA-AX Datasheet - Page 679

• Manufacturer Part Number: UPD78F0551MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0551MA-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: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 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
21.1 Functions of Power-on-Clear Circuit
R01UH0028EJ0400 Rev.4.00
Sep 27, 2010
The power-on-clear circuit (POC) is mounted onto all 78K0/Kx2-L microcontroller products.
The power-on-clear circuit has the following functions.
• Generates internal reset signal at power on.
• The reset signal is released when the supply voltage (V
• Compares supply voltage (V
Caution If an internal reset signal is generated in the POC circuit, the reset control flag register (RESF) is
Remark The 78K0/Kx2-L microcontrollers incorporate multiple hardware functions that generate an internal reset
Caution If the LVI default function enabled is set by using an option byte, the reset signal is not released
when V
DD
until the supply voltage (V
< V
cleared to 00H.
signal. A flag that indicates the reset source is located in the reset control flag register (RESF) for when
an internal reset signal is generated by the watchdog timer (WDT) and low-voltage-detector (LVI). RESF
is not cleared to 00H and the flag is set to 1 when an internal reset signal is generated by WDT or LVI.
For details of RESF, refer to CHAPTER 20 RESET FUNCTION.
PDR
.
CHAPTER 21 POWER-ON-CLEAR CIRCUIT
DD
) and POC detection voltage (V
DD
) exceeds 1.91 V ±0.1 V.
DD
) exceeds POC detection voltage (V
PDR
CHAPTER 21 POWER-ON-CLEAR CIRCUIT
= 1.59 V ±0.09 V), generates internal reset signal
POR
= 1.61 V ±0.09 V).
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