14 8-BIT OSC1 TIMER (T8OSC1)
S1C17001 TECHNICAL MANUAL
EPSON
161
14 8-bit OSC1 Timer (T8OSC1)
14.1 8-bit OSC1 Timer Overview
The S1C17001 incorporates a single-channel 8-bit OSC1 timer that uses the OSC1 clock as its oscillation source.
Figure 14.1.1 illustrates the 8-bit OSC1 timer configuration.
Compare data register
T8OSC1_CMP
OSC1-1/1 to 1/32
Inter
nal data bus
Compare match interrupt request
To ITC
Compare
match
signal
Up counter
T8OSC1_CNT
Count
control
circuit
Interrupt
control circuit
Comparator
RUN/STOP control
T8ORUN
Timer reset
T8ORST
Count mode
selection
T8ORMD
Interrupt enable
T8OIE
8-bit OSC1 timer
OSC
OSC1 oscillator/
division circuit
Gate
Division ratio selection
Figure 14.1.1: 8-bit OSC1 timer configuration
The 8-bit OSC1 timer includes an 8-bit up-counter (T8OSC1_CNT register) and 8-bit compare data register
(T8OSC1_CMP register).
The 8-bit counter can be reset to 0 by software and counts up using the OSC1 division clock (OSC1-1/1 to
OSC1-1/32). The count value can be read by software.
The compare data register contains the data for comparisons against the up counter contents. The comparator out-
puts a signal to control interrupts if the counter value matches the contents of the compare data register. This means
the compare data register can be used to program the interrupt occurrence cycle.
Содержание S1C17001
Страница 1: ...Technical Manual S1C17001 CMOS 16 BIT SINGLE CHIP MICROCONTROLLER ...
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