UPD78F0386GK-8EU-A Renesas Electronics America, UPD78F0386GK-8EU-A Datasheet - Page 243

• Manufacturer Part Number: UPD78F0386GK-8EU-A
• Description: MCU 96KB FLASH 5KB RAM
• Manufacturer: Renesas Electronics America
• Series: 78K0/Lx2r

Specifications of UPD78F0386GK-8EU-A

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LCD, LVD, POR, PWM, WDT
• Number Of I /o: 26
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

10.1 Functions of Watchdog Timer
signal is generated.
For details of RESF, see CHAPTER 22 RESET FUNCTION.
The watchdog timer operates on the internal low-speed oscillation clock.
The watchdog timer is used to detect an inadvertent program loop. If a program loop is detected, an internal reset
Program loop is detected in the following cases.
When a reset occurs due to the watchdog timer, bit 4 (WDTRF) of the reset control flag register (RESF) is set to 1.
If the watchdog timer counter overflows
If a 1-bit manipulation instruction is executed on the watchdog timer enable register (WDTE)
If data other than “ACH” is written to WDTE
If data is written to WDTE during a window close period
If the instruction is fetched from an area not set by the IMS and IXS registers (detection of an invalid check while
the CPU hangs up)
If the CPU accesses an area that is not set by the IMS and IXS registers (excluding FB00H to FFFFH) by
executing a read/write instruction (detection of an abnormal access during a CPU program loop)
CHAPTER 10 WATCHDOG TIMER
User’s Manual U17504EJ2V0UD
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