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參數(shù)資料
| 型號： | P83CL410HFT |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Low voltage 8-bit microcontrollers with I2C-bus |
| 中文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PDSO40 |
| 封裝： | PLASTIC, VSOP-40 |
| 文件頁數(shù)： | 30/60頁 |
| 文件大?。?/td> | 266K |
| 代理商： | P83CL410HFT |
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1997 Apr 10
30
Philips Semiconductors
Product specification
Low voltage 8-bit microcontrollers with
I
2
C-bus
P80CL410; P83CL410
15 OSCILLATOR CIRCUITRY
The on-chip oscillator circuitry of the P8xCL410 is a
single-stage inverting amplifier biased by an internal
feedback resistor. The oscillator circuit is shown in Fig.15.
For operation as a standard quartz oscillator, no external
components are needed, except for the 32 kHz option.
When using external capacitors, ceramic resonators, coils
and RC networks to drive the oscillator, five different
configurations are supported (see Table 33 and Fig.14).
In the Power-down mode the oscillator is stopped and
XTAL1 is pulled HIGH. The oscillator inverter is switched
off to ensure no current will flow regardless of the voltage
at XTAL1, for configurations (a), (b), (c), (d), (e) and (g) of
Fig.14.
To drive the device with an external clock source, apply the
external clock signal to XTAL1, and leave XTAL2 to float,
as shown in Fig.14(f). There are no requirements on the
duty cycle of the external clock, since the input to the
internal clocking circuitry is buffered by a flip-flop.
Various oscillator options are provided for optimum
on-chip oscillator performance; these are specified in
Table 33 and shown in Fig.14. The required option should
be stated when ordering.
Table 33
Oscillator options
OPTION
APPLICATION
Oscillator 1
for 32 kHz clock applications with external trimmer for frequency adjustment; a 4.7 M
bias resistor
is needed for use in parallel with the crystal; see Fig.14(c)
low-power, low-frequency operations using LC components; see Fig.14(e)
medium frequency range applications
high frequency range applications
RC oscillator configuration; see Figs 14(g) and 16
Oscillator 2
Oscillator 3
Oscillator 4
RC oscillator
handbook, full pagewidth
MLA577
VDD
XTAL1
XTAL2
(d)
XTAL1
XTAL2
(e)
XTAL1
XTAL2
(f)
XTAL1
XTAL2
(g)
n.c.
n.c.
XTAL1
XTAL2
(b)
XTAL1
XTAL2
(c)
XTAL1
XTAL2
(a)
STANDARD
QUARTZ
OSCILLATOR
QUARTZ OSCILLATOR
WITH EXTERNAL
CAPACITORS
32 kHz
OSCILLATOR
CERAMIC
RESONATOR
LC - OSCILLATOR
EXTERNAL CLOCK
RC - OSCILLATOR
Fig.14 Oscillator configurations.
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相關(guān)代理商/技術(shù)參數(shù) |
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| P83CL411HFT | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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| P83CL580HFD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| P83CL781 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low voltage 8-bit microcontrollers with UART and I2C-bus |
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