UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 280
UPD78F0413GA-GAM-AX
Manufacturer Part Number
UPD78F0413GA-GAM-AX
Description
8BIT UC, 32K FLASH, 1KB RAM, LCD
Manufacturer
NEC
Datasheet
1.UPD78F0413GA-GAM-AX.pdf
(562 pages)
Specifications of UPD78F0413GA-GAM-AX
Controller Family/series
UPD78F
No. Of I/o's
30
Ram Memory Size
1024Byte
Cpu Speed
10MHz
No. Of Timers
8
No. Of Pwm
RoHS Compliant
Core Size
8bit
Program Memory Size
32KB
Oscillator Type
External, Internal
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10.1 Functions of Watchdog Timer
signal is generated.
For details of RESF, see CHAPTER 20 RESET FUNCTION.
280
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 register (detection of an invalid check while the CPU
hangs up)
If the CPU accesses an area that is not set by the IMS register (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 U18698EJ1V0UD
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