參數(shù)資料
型號： pic12ce674
廠商： Microchip Technology Inc.
英文描述： 8-Pin, 8-Bit CMOS Microcontroller with A/D Converter(具A/D轉(zhuǎn)換器和EEPROM數(shù)據(jù)存儲器的8位微控制器)
中文描述： 8引腳，8位CMOS微控制器與A / D轉(zhuǎn)換器（具的A / D轉(zhuǎn)換器和EEPROM的數(shù)據(jù)存儲器的8位微控制器）
文件頁數(shù)： 46/112頁
文件大小： 1205K
代理商： PIC12CE674
PIC12CE67X
DS40181A-page 46
Preliminary
1998 Microchip Technology Inc.
9.2
Oscillator Configurations
9.2.1
OSCILLATOR TYPES
The PIC12CE67X can be operated in seven different
oscillator modes. The user can program three
configuration bits (FOSC2:FOSC0) to select one of
these seven modes:
LP:
Low Power Crystal
HS:
High Speed Crystal Resonator
XT:
Crystal/Resonator
INTRC*:
Internal 4 MHz Oscillator
EXTRC*: External Resistor/Capacitor
*Can be configured to support CLKOUT
9.2.2
CRYSTAL OSCILLATOR / CERAMIC
RESONATORS
In XT, HS or LP modes, a crystal or ceramic resonator
is connected to the GP5/OSC1/CLKIN and GP4/OSC2
pins
to
establish
oscillation
PIC12CE67X oscillator design requires the use of a
parallel cut crystal. Use of a series cut crystal may
give a frequency out of the crystal manufacturers
specifications. When in XT, HS or LP modes, the
device can have an external clock source drive the
GP5/OSC1/CLKIN pin (Figure 9-3).
(Figure 9-2). The
FIGURE 9-2:
CRYSTAL OPERATION
(OR CERAMIC RESONATOR)
(XT, HS OR LP OSC
CONFIGURATION)
FIGURE 9-3:
EXTERNAL CLOCK INPUT
OPERATION (XT, HS OR LP
OSC CONFIGURATION)
Note 1: See Capacitor Selection tables for
recommended values of C1 and C2.
2: A series resistor (RS) may be required for
AT strip cut crystals.
3: RF varies with the crystal chosen
(approx. value = 10 M
).
C1
(1)
C2
(1)
XTAL
OSC2
OSC1
RF
(3)
SLEEP
To logic
RS
(2)
PIC12CE67X
Clock from
ext. system
OSC1
OSC2
PIC12CE67X
Open
TABLE 9-1:
CAPACITOR SELECTION
FOR CERAMIC RESONATORS
- PIC12CE67X
Resonator
Freq
C1
455 kHz
2.0 MHz
4.0 MHz
15-68 pF
4.0 MHz
8.0 MHz
10.0 MHz
10-22 pF
These values are for design guidance only. Since
each resonator has its own characteristics, the user
should consult the resonator manufacturer for
appropriate values of external components.
TABLE 9-2:
CAPACITOR SELECTION
FOR CRYSTAL OSCILLATOR
- PIC12CE67X
Resonator
Freq
C1
32 kHz
(1)
100 kHz
200 kHz
15-30 pF
100 kHz
200 kHz
455 kHz
1 MHz
2 MHz
4 MHz
15-47 pF
4 MHz
8 MHz
10 MHz
15-30 pF
Note 1: For V
DD
> 4.5V, C1 = C2
≈
30 pF is
recommended.
These values are for design guidance only. Rs may
be required in HS mode as well as XT mode to avoid
overdriving crystals with low drive level specification.
Since each crystal has its own characteristics, the
user should consult the crystal manufacturer for
appropriate values of external components.
Osc
Type
XT
Cap. Range
Cap. Range
C2
22-100 pF
15-68 pF
15-68 pF
15-68 pF
10-68 pF
10-22 pF
22-100 pF
15-68 pF
HS
15-68 pF
10-68 pF
Osc
Type
LP
Cap.Range
Cap. Range
C2
15 pF
30-47 pF
15-82 pF
200-300 pF
100-200 pF
15-100 pF
15-30 pF
15-30 pF
15-47 pF
15-30 pF
15-30 pF
15-30 pF
15 pF
15-30 pF
XT
15-30 pF
15-30 pF
15-30 pF
15-30 pF
15-30 pF
HS
15-30 pF
15-30 pF
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC12CE674/JW 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 6 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC12CE674-04/JM 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontroller with A/D Converter
PIC12CE674-04/JW 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontroller with A/D Converter and EEPROM Data Memory
PIC12CE674-04/P 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 6 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC12CE674-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 12CE674 DIP8
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