Specifications

S1C62N82 TECHNICAL HARDWARE EPSON I-53
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Clock Timer)
Clock Timer
The S1C62N82 Series have a built-in clock timer driven by
the source oscillator. The clock timer is configured as a
seven-bit binary counter that serves as a frequency divider
taking a 256 Hz source clock from a prescaler. The four
high-order bits (16 Hz–2 Hz) can be read by the software.
Figure 4.7.1 is the block diagram of the clock timer.
Normally, this clock timer is used for all kinds of timing
purpose, such as clocks.
4.7
Configuration of
clock timer
Fig. 4.7.1
Block diagram of
clock timer
128 Hz–32 Hz
Data bus
32 Hz, 8 Hz, 2 Hz
256 Hz
Clock timer reset signal
OSC
(oscillation
circuit)
Interrupt
request
Interrupt
control
16 Hz–2 Hz