15 CLOCK TIMER (TC)
S1C17001 TECHNICAL MANUAL
EPSON
177
15 Clock Timer (CT)
15.1 Clock Timer Overview
The S1C17001 incorporates a single-channel clock timer that uses the OSC1 clock as its oscillation source.
The clock timer consists of an 8-bit binary counter that uses the 256 Hz signal divided from the OSC1 clock as the
input clock and allows data for each bit (128 Hz to 1 Hz) to be read out by software.
The clock timer can also generate interrupts using the 32 Hz, 8 Hz, 2 Hz, and 1 Hz signals.
This clock timer is normally used for various timing functions, such as clocks.
Figure 15.1.1 illustrates the clock timer configuration.
256Hz
Inter
nal data bus
Clock timer interrupt request
To ITC
128
Hz
64
Hz
32
Hz
16
Hz
8
Hz
4
Hz
2
Hz
1
Hz
Count
control
circuit
Interrupt
control
circuit
RUN/STOP
control
Interrupt enable
CTRUN
CTIE32
CTIE8
CTIE2
CTIE1
Timer reset
CTRST
CT_CNT
D0
D1
D2
D3
D4
D5
D6
D7
Clock timer
OSC
OSC1 oscillator/
division circuit
Figure 15.1.1: Clock timer configuration
Summary of Contents for S1C17001
Page 1: ...Technical Manual S1C17001 CMOS 16 BIT SINGLE CHIP MICROCONTROLLER ...
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