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| 型號： | S1C60L09D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 0.08 MHz, MICROCONTROLLER, UUC70 |
| 封裝： | DIE-70 |
| 文件頁數(shù)： | 35/62頁 |
| 文件大?。?/td> | 476K |
| 代理商： | S1C60L09D |
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CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Stopwatch Timer)
34
EPSON
S1C60N09 TECHNICAL MANUAL
4.8 Stopwatch Timer
4.8.1 Configuration of stopwatch timer
The S1C60N09 Series has a built-in 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 divider). Data can be read
out four bits at a time by the software.
Figure 4.8.1.1 is the block diagram of the stopwatch timer.
SWL timer
Data bus
10 Hz,1 Hz
256 Hz
Stopwatch timer reset signal
Stopwatch timer RUN/STOP signal
Oscillation
circuit
Interrupt
request
Interrupt
control
10 Hz
SWH timer
Fig. 4.8.1.1 Block diagram of stopwatch timer
The stopwatch timer can be used separately from the clock timer. In particular, digital stopwatch func-
tions can be easily realized by software.
4.8.2 Count-up pattern
The stopwatch timer is configured as two four-bit BCD timers, SWL and SWH. The SWL timer, at the
stage preceding the stopwatch timer, has an approximate l00 Hz signal as its input clock. It counts up
every 1/100 sec and generates an approximate 10 Hz signal. The SWH timer has an approximate 10 Hz
signal generated by the SWL timer for its input clock. It counts up every 1/10 sec and generates a 1 Hz
signal.
Figure 4.8.2.1 shows the count-up pattern of the stopwatch timer.
26
256
26
256
26
256
26
256
26
256
26
256
25
256
25
256
25
256
25
256
3
256
2
256
3
256
2
256
2
256
2
256
3
256
3
256
3
256
2
256
3
256
2
256
3
256
3
256
3
256
3
256
3
256
2
256
2
256
2
256
26
256
25
256
26
256
25
256
x 6 +
x 4 = 1 (S)
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
1 Hz
signal
generation
Approximate
10 Hz
signal
generation
Approximate
10 Hz
signal
generation
SWH count value
Counting time (S)
(S)
SWL count value
Counting time (S)
SWL count value
Counting time (S)
SWH count-up pattern
SWL count-up pattern 1
SWL count-up pattern 2
Fig. 4.8.2.1 Count-up pattern of stopwatch timer
SWL generates an approximate 10 Hz signal from the 256 Hz based signal. The count-up intervals are 2/
256 sec and 3/256 sec, so that two final patterns are generated: a 25/256 sec interval and a 26/256 sec
interval. Consequently, the count-up intervals are 2/256 sec and 3/256 sec, which do not amount to an
accurate 1/100 sec. SWH counts the approximate 10 Hz signals generated by the 25/256 sec and 26/256
sec intervals in the ratio of 4:6 to generate a l Hz signal. The count-up intervals are 25/256 sec and 26/256
sec, which do not amount to an accurate 1/10 sec.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| S1C63358F | 4-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP100 |
| S1D13503F00A | 1024 X 768 PIXELS CRT OR FLAT PNL GRPH DSPL CTLR, PQFP100 |
| S1DGPC | SLIDE SWITCH, SPDT, LATCHED, 0.05A, 48VDC, THROUGH HOLE-STRAIGHT |
| S1F | 1.2 A, 50 V, SCR, TO-92 |
| S2A | 1.5 A, 100 V, SCR, TO-92 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| S1C60L16 | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer |
| S1C60N05 | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer |
| S1C60N08 | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer |
| S1C60N16 | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer |
| S1C60R08 | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer |
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