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參數(shù)資料
| 型號(hào)： | S1C60N08F0A0100 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER, PQFP100 |
| 封裝： | PLASTIC, QFP-100 |
| 文件頁(yè)數(shù)： | 105/145頁(yè) |
| 文件大小： | 1118K |
| 代理商： | S1C60N08F0A0100 |
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I-50
EPSON
S1C60N08 TECHNICAL HARDWARE
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Clock Timer)
4.9 Clock Timer
4.9.1 Configuration of clock timer
The S1C60N08 Series has a built-in clock timer as the source oscillator for prescaler. The clock timer is
configured of a seven-bit binary counter that serves as the input clock, a 256 Hz signal output by the
prescaler. Data of the four high-order bits (16 Hz–2 Hz) can be read out by the software.
Figure 4.9.1.1 is the block diagram for the clock timer.
32 Hz, 8 Hz, 2 Hz
256 Hz
Clock timer reset signal
Interrupt request
OSC1
oscillation
circuit
Watchdog
timer
Selector
Data bus
128 Hz–32 Hz
Prescaler 1
Prescaler 2
16 Hz–2 Hz
Prescaler selection signal
Interrupt
control
Clock Timer
Fig. 4.9.1.1 Clock timer block diagram
Ordinarily, this clock timer is used for all types of timing functions such as clocks.
The input clock of the clock timer is output through the prescaler, so the prescaler mode must be set
correctly to suit the crystal oscillator to be used (32.768 kHz or 38.4 kHz). For how to set the prescaler, see
Section 4.3, "Oscillation Circuit and Prescaler".
4.9.2 Interrupt function
The clock timer can cause interrupts at the falling edge of 32 Hz, 8 Hz and 2 Hz signals. Software can set
whether to mask any of these frequencies.
Figure 4.9.2.1 is the timing chart of the clock timer.
Clock timer timing chart
Frequency
Register
Address
2E0H
D0
16 Hz
D1
D2
D3
8 Hz
4 Hz
2 Hz
32 Hz interrupt request
8 Hz interrupt request
2 Hz interrupt request
Fig. 4.9.2.1 Clock timer timing chart
As shown in Figure 4.9.2.1, interrupt is generated at the falling edge of the frequencies (32 Hz, 8 Hz , 2
Hz). At this time, the corresponding interrupt factor flag (TI32, TI8, TI2) is set to "1". Selection of whether
to mask the separate interrupts can be made with the interrupt mask registers (ETI32, ETI8, ETI2).
However, regardless of the interrupt mask register setting, the interrupt factor flag is set to "1" at the
falling edge of the corresponding signal.
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相關(guān)代理商/技術(shù)參數(shù) |
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| S1C60N16 | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer |
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| S1C63016 | 制造商:EPSON 制造商全稱:EPSON 功能描述:CMOS 4-bit Single Chip Microcontroller |
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