參數(shù)資料
型號： PIC16C505
廠商： Microchip Technology Inc.
英文描述： 14-Pin, 8-Bit CMOS Microcontroller(每個I/O口有25mA驅動/吸收電流,12個I/O口，帶WDT的微控制器)
中文描述： 14引腳，8位CMOS微控制器（每個的I / O口有25毫安驅動/吸收電流，12個的I / O口，帶看門狗的微控制器）
文件頁數(shù)： 28/80頁
文件大?。?/td> 617K
代理商： PIC16C505
PIC16C505
DS40192A-page 28
Preliminary
1998 Microchip Technology Inc.
7.2
Oscillator Configurations
7.2.1
OSCILLATOR TYPES
The PIC16C505 can be operated in four different
oscillator modes. The user can program three
configuration bits (FOSC2:FOSC0) to select one of
these four modes:
LP:
Low Power Crystal
XT:
Crystal/Resonator
HS:
High Speed Crystal/Resonator
INTRC: Internal 4 MHz Oscillator
EXTRC: External Resistor/Capacitor
7.2.2
CRYSTAL OSCILLATOR / CERAMIC
RESONATORS
In HS, XT or LP modes, a crystal or ceramic resonator
is connected to the RB5/OSC1/CLKIN and RB4/
OSC2/CLKOUT pins to establish oscillation (Figure 7-
2). The PIC16C505 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 HS, XT or LP modes, the
device can have an external clock source drive the
RB5/OSC1/CLKIN pin (Figure 7-3).
FIGURE 7-2:
CRYSTAL OPERATION (OR
CERAMIC RESONATOR) (HS,
XT OR LP OSC
CONFIGURATION)
FIGURE 7-3:
EXTERNAL CLOCK INPUT
OPERATION (HS, XT 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)
PIC16C505
Clock from
ext. system
OSC1
OSC2
PIC16C505
Open
TABLE 7-1:
CAPACITOR SELECTION
FOR CERAMIC RESONATORS
- PIC16C505
Resonator
Freq
C1
4.0 MHz
30 pF
16 MHz
10-47 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 7-2:
CAPACITOR SELECTION
FOR CRYSTAL OSCILLATOR
- PIC16C505
Resonator
Freq
C1
32 kHz
(1)
15 pF
200 kHz
1 MHz
4 MHz
15 pF
20 MHz
15-47 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 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
HS
Cap. Range
Cap. Range
C2
30 pF
10-47 pF
Osc
Type
LP
XT
Cap.Range
Cap. Range
C2
15 pF
47-68 pF
15 pF
15 pF
15-47 pF
47-68 pF
15 pF
HS
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相關代理商/技術參數(shù)
參數(shù)描述
PIC16C505/JW 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 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 安裝風格:SMD/SMT
PIC16C505-04/P 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz PDIP14 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 安裝風格:SMD/SMT
PIC16C505-04/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU (TUBE 30) 16C505 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C505 DIP14
PIC16C505-04/SL 功能描述:8位微控制器 -MCU 1.5KB 72 RAM 12 I/O 4MHz SOIC14 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 安裝風格:SMD/SMT
PIC16C505-04/SL 制造商:Microchip Technology Inc 功能描述:8BIT CMOS MCU SMD 16C505 SOIC14
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