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參數(shù)資料
| 型號： | S1C63653F |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, FLASH, 4 MHz, MICROCONTROLLER, CQFP100 |
| 封裝： | CERAMIC, QFP15-100 |
| 文件頁數(shù)： | 55/121頁 |
| 文件大?。?/td> | 1127K |
| 代理商： | S1C63653F |
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S1C63653 TECHNICAL MANUAL
EPSON
31
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Oscillation Circuit)
4.4.3 OSC3 oscillation circuit
The S1C63653 has built-in the OSC3 oscillation circuit that generates the CPU's sub-clock (Max. 4 MHz)
for high speed operation and the source clock for peripheral circuits needing a high speed clock (pro-
grammable timer, FOUT output). The mask option enables selection of the oscillator type from CR
(external R type), CR (built-in R type) and ceramic oscillation circuit. When CR oscillation (external R
type) is selected, only a resistance is required as an external element. When ceramic oscillation is selected,
a ceramic oscillator and two capacitors (gate and drain capacitance) are required. When CR oscillation
(built-in R type) is selected, no external element is required.
Figure 4.4.3.1 is the block diagram of the OSC3 oscillation circuit.
To CPU
(and some peripheral circuits)
Oscillation circuit control signal
(b) CR oscillation circuit (built-in R type)
(c) Ceramic oscillation circuit
C CR
R
CR
VSS
CGC
CDC
Ceramic
OSC4
OSC3
R
RDC
To CPU
(and some peripheral circuits)
Oscillation circuit control signal
FC
To CPU
(and some peripheral circuits)
Oscillation circuit control signal
(a) CR oscillation circuit (external R type)
C CR
OSC3
OSC4
R
CR
Fig. 4.4.3.1 OSC3 oscillation circuit
As shown in Figure 4.4.3.1, the CR oscillation circuit (external R type) can be configured simply by
connecting the resistor RCR between the OSC3 and OSC4 terminals when CR oscillation is selected. See
Chapter 7, "Electrical Characteristics" for resistance value of RCR.
When ceramic oscillation is selected, the ceramic oscillation circuit can be configured by connecting the
ceramic oscillator (Max. 4 MHz) between the OSC3 and OSC4 terminals, capacitor CGC between the OSC3
and OSC4 terminals, and capacitor CDC between the OSC4 and VSS terminals. For both CGC and CDC,
connect capacitors that are about 30 pF. To reduce current consumption of the OSC3 oscillation circuit,
oscillation can be stopped by the software (OSCC register).
Table 4.4.3.1 OSC3 oscillation frequency
Oscillation circuit
Ceramic oscillation
CR oscillation (built-in R type)
CR oscillation (external R type)
Oscillation frequency
Max. 4 MHz (2 MHz Note)
Typ. 1.1 MHz
±30%
200 kHz to 2 MHz
Note: When selecting OSC3 for the time base counter clock of the R/f converter, the maximum frequency
of the OSC3 clock is limited to 2 MHz.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
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| S1C63666 | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer |
| S1C63709 | 制造商:EPSON 制造商全稱:EPSON 功能描述:4-bit Single Chip Microcomputer |
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