UPD78F0500AMC-CAB-AX Renesas Electronics America, UPD78F0500AMC-CAB-AX Datasheet - Page 692

• Manufacturer Part Number: UPD78F0500AMC-CAB-AX
• Description: MCU 8BIT 30SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2r

Specifications of UPD78F0500AMC-CAB-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 23
• 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
24.1 Functions of Power-on-Clear Circuit
R01UH0008EJ0401 Rev.4.01
Jul 15, 2010
The power-on-clear circuit (POC) is mounted onto all 78K0/Kx2 microcontroller products.
The power-on-clear circuit has the following functions.
• Generates internal reset signal at power on.
• Compares supply voltage (V
In the 1.59 V POC mode (option byte: POCMODE = 0), the reset signal is released when the supply voltage (V
exceeds 1.59 V ±0.15 V.
In the 2.7 V/1.59 V POC mode (option byte: POCMODE = 1), the reset signal is released when the supply voltage
(V
Caution If an internal reset signal is generated in the POC circuit, the reset control flag register (RESF) is
Remark 78K0/Kx2 microcontrollers incorporate multiple hardware functions that generate an internal reset signal.
V
DD
DD
< V
) exceeds 2.7 V ±0.2 V.
POC
cleared to 00H.
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) or 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, see CHAPTER 23 RESET FUNCTION.
.
CHAPTER 24 POWER-ON-CLEAR CIRCUIT
DD
) and detection voltage (V
POC
= 1.59 V ±0.15 V), generates internal reset signal when
CHAPTER 24 POWER-ON-CLEAR CIRCUIT
692
DD
)