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參數(shù)資料
| 型號： | KS57C2504 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 元件分類： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機(jī)的小型通用紅外遙控器 |
| 文件頁數(shù)： | 45/94頁 |
| 文件大?。?/td> | 763K |
| 代理商： | KS57C2504 |
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S3C7254
PRODUCT SPECIFICATION
4–45
8-BIT TIMER/COUNTER 0 (TC0)
OVERVIEW
Timer/counter 0 (TC0) is used to count system
'events' by identifying the transition (high-to-low or
low-to-high) of incoming square wave signals. To
indicate that an event has occurred, or that a
specified time interval has elapsed, TC0 generates
an interrupt request. By counting signal transitions
and comparing the current counter value with the
reference register value, TC0 can be used to
measure specific time intervals.
TC0 has a reloadable counter that consists of two
parts: an 8-bit reference register (TREF0) into which
you write the counter reference value, and an 8-bit
counter register (TCNT0) whose value is
automatically incremented by counter logic.
An 8-bit mode register, TMOD0, is used to activate
the timer/counter and to select the basic clock
frequency to be used for timer/counter operations.
To dynamically modify the basic frequency, new
values can be loaded into the TMOD0 register
during program execution.
Timer/counter 0 can supply a clock signal to the
clock selector circuit of the serial I/O interface for
data shifter and clock counter operations. (These
internal SIO operations are controlled in turn by the
SIO mode register, SMOD). This clock generation
function enables you to adjust data transmission
rates across the serial interface.
TCL0
TCLO0
SERIAL
I/O
CLEAR
INVERTED
CLEAR
SET
CLEAR
CLOCKS
(fxx/210, fxx/26, fxx/24, fxx)
8
8
8
TMOD0.0
TMOD0.1
TMOD0.2
TMOD0.3
TMOD0.4
TMOD0.5
TMOD0.6
TMOD0.7
TCNT0
8-BIT
COMPARATOR
TOL0
P4.2 LATCH
TOE0
IRQT0
PM4.2
CLOCK
SELECTOR
TREF0
Figure 31. TC0 Circuit Diagram
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