Filter
Top Products
S3C84E5/C84E9/P84E9 WATCH TIMER
14-1
14 WATCH TIMER
OVERVIEW
Watch timer functions include real-time and watch-time measurement and interval timing for the system clock. To
start watch timer operation, set bit1 and bit 6 of the watch timer mode register, WTCON.1and 6, to “1”. After the
watch timer starts and elapses a time, the watch timer interrupt is automatically set to “1”, and interrupt requests
commence in 1.955 ms or 0.125, 0.25 and 0.5-second intervals.
The watch timer can generate a steady 0.5 kHz, 1 kHz, 2 kHz, or 4 kHz signal to the BUZZER output (BZOUT pin).
By setting WTCON.3 and WTCON.2 to “11b”, the watch timer will function in high-speed mode, generating an
interrupt every 1.955 ms. High-speed mode is useful for timing events for program debugging sequences.
— Real-time and Watch-time measurement
— Using a main system or subsystem clock source
— Buzzer output frequency generator
— Timing tests in high-speed mode