Specifications

I-58 EPSON S1C62N82 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Stopwatch Timer)
Stopwatch Timer
The S1C62N82 Series incorporate a 1/100 sec and 1/10 sec
stopwatch timer. The stopwatch timer is configured as a
two-stage, four-bit BCD timer serving as the clock source for
an approximately 100 Hz signal (obtained by approximately
dividing the 256 Hz signal output from the prescaler). Data
can be read out four bits at a time by the software.
Figure 4.8.1 is the block diagram of the stopwatch timer.
Configuration of
stopwatch timer
4.8
The stopwatch timer can be used separately from the clock
timer. In particular, digital stopwatch functions can be
easily realized by software.
Fig. 4.8.1
Block diagram of stop-
watch timer
SWL timer
Data bus
10 Hz, 1 Hz
256 Hz
Stopwatch timer reset signal
Stopwatch timer RUN/STOP signal
OSC
(oscillation
circuit)
Interrupt
request
Interrupt
control
10 Hz
SWH timer