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Watchdog Timer
12-9
Watchdog operation
If the WDCNE flag is set to "1" and the watchdog operation is enabled, a non-maskable interrupt is generated if a
watchdog timer overflow occurs.
When an overflow occurs, the watchdog timer overflow output is output to the WDOVF flag. Pulse output or level
output can be selected through the WDOVT flag. When level output is selected, the watchdog timer overflow
output (WDOVF flag) is cleared by writing a "1" to the WDRST flag or by reset (RST) pin "L" level input.
Fig. 12-5-3 Operation Diagram 3: Watchdog Operation
Before setting the WDCNE flag to "1", write a "1" to the WDRST flag to reset the counter.
When switching to HALT or SLEEP mode, set the WDCNE flag to "0" to turn off the watchdog timer.
Self-reset operation
The chip resets internally when a "1" is written to the CHIPRST bit in the RSTCTR register. The oscillation
stabilization wait operation is not performed.
The reset generated by writing the CHIPRST flag is an internal reset signal within the chip and does not manifest
itself on the external reset pin (RST pin).
Watchdog timer
count value
Overflow
4.369 ms to 1118.481 ms
(when CKSEL = “H” and the oscillating input
frequency is 15 MHz)
Counter reset by writing
“1” to the WDRST flag
Non-maskable interrupt
WDOVF flag output
(when pulse output is
selected)
WDOVF flag output
(when level output is
selected)
SYSCLK 255-cycle width
Reset by writing a “1”
to the WDRST flag, or
by reset pin input
Содержание MN103001G/F01K
Страница 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Страница 2: ......
Страница 4: ......
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Страница 7: ...14 A D Converter 15 I O Ports 16 Internal Flash Memory 17 Ordering Mask ROM Appendix 14 15 16 17 ...
Страница 8: ......
Страница 9: ...Table of Contents List of Figures and Tables 0 ...
Страница 26: ...xviii ...
Страница 27: ...1 0 1 General Specifications ...
Страница 35: ...2 CPU 2 ...
Страница 57: ...3 Extension Instruction Specifications 3 ...
Страница 96: ...Extension Instruction Specifications 3 40 ...
Страница 97: ...4 Memory Modes 3 4 ...
Страница 102: ...Memory Modes 4 6 ...
Страница 103: ...5 Operating Mode 5 ...
Страница 107: ...6 Clock Generator 6 13 ...
Страница 111: ...7 Internal Memory 7 ...
Страница 114: ...Internal Memory 7 4 ...
Страница 115: ...8 Bus Controller BC 8 ...
Страница 189: ...9 Interrupt Controller 9 ...
Страница 220: ...Interrupt Controller 9 32 ...
Страница 221: ...10 8 bit Timers 9 10 ...
Страница 254: ...8 bit Timers 10 34 ...
Страница 255: ...11 16 bit Timers 11 ...
Страница 292: ...16 bit Timers 11 38 ...
Страница 293: ...12 Watchdog Timer 11 12 ...
Страница 302: ...Watchdog Timer 12 10 ...
Страница 303: ...13 Serial Interface 13 ...
Страница 354: ...Serial Interface 13 52 ...
Страница 355: ...14 A D Converter 14 ...
Страница 367: ...15 I O Ports 15 ...
Страница 431: ...16 Internal Flash Memory 16 ...
Страница 439: ...17 17 Ordering Mask ROM ...
Страница 442: ...Ordering Mask ROM 17 4 ...
Страница 443: ...Appendix ...