參數(shù)資料
型號： DM164134
廠商： Microchip Technology
文件頁數(shù)： 21/116頁
文件大?。?/td> 0K
描述： KIT DEV PIC18F4XK22
標(biāo)準(zhǔn)包裝： 1
系列： PIC® 18F
類型： MCU
適用于相關(guān)產(chǎn)品： PIC18F4XK22，PIC18F2XK22
所含物品： 板，文檔
PIC18FXX8
DS41159E-page 18
2006 Microchip Technology Inc.
TABLE 2-2:
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
2.3
RC Oscillator
For timing insensitive applications, the “RC” and “RCIO”
device options offer additional cost savings. The RC
oscillator frequency is a function of the supply voltage,
the resistor (REXT) and capacitor (CEXT) values and the
operating temperature. In addition to this, the oscillator
frequency will vary from unit to unit due to normal
process parameter variation. Furthermore, the differ-
ence in lead frame capacitance between package types
will also affect the oscillation frequency, especially for
low CEXT values. The user also needs to take into
account variation due to tolerance of external R and C
components used. Figure 2-2 shows how the RC
combination is connected.
In the RC Oscillator mode, the oscillator frequency
divided by 4 is available on the OSC2 pin. This signal
may be used for test purposes or to synchronize other
logic.
FIGURE 2-2:
RC OSCILLATOR MODE
The RCIO Oscillator mode functions like the RC mode,
except that the OSC2 pin becomes an additional
general purpose I/O pin. The I/O pin becomes bit 6 of
PORTA (RA6).
Osc Type
Crystal
Freq
Cap. Range
C1
Cap. Range
C2
LP
32.0 kHz
33 pF
200 kHz
15 pF
XT
200 kHz
47-68 pF
1.0 MHz
15 pF
4.0 MHz
15 pF
HS
4.0 MHz
15 pF
8.0 MHz
15-33 pF
20.0 MHz
15-33 pF
25.0 MHz
15-33 pF
These values are for design guidance only.
See notes on this page.
Crystals Used
32.0 kHz
Epson C-001R32.768K-A
±20 PPM
200 kHz
STD XTL 200.000KHz
±20 PPM
1.0 MHz
ECS ECS-10-13-1
±50 PPM
4.0 MHz
ECS ECS-40-20-1
±50 PPM
8.0 MHz
EPSON CA-301 8.000M-C
±30 PPM
20.0 MHz
EPSON CA-301 20.000M-C
±30 PPM
Note 1: Recommended values of C1 and C2 are
identical to the ranges tested (Table 2-1).
2: Higher capacitance increases the stability
of the oscillator but also increases the
start-up time.
3: Since each resonator/crystal has its own
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate
values
of
external
components.
4: Rs may be required in HS mode, as well
as XT mode, to avoid overdriving crystals
with low drive level specification.
Note:
If the oscillator frequency divided by 4
signal is not required in the application, it
is recommended to use RCIO mode to
save current.
OSC2/CLKO
CEXT
REXT
PIC18FXX8
OSC1
FOSC/4
Internal
Clock
VDD
VSS
Recommended values:
3 k
Ω ≤ REXT ≤ 100 kΩ
CEXT > 20 pF
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參數(shù)描述
DM164135 制造商:Microchip Technology Inc 功能描述:KIT, ONEPIC DEMO BOARD, PLUS PICKIT 3 制造商:Microchip Technology Inc 功能描述:KIT, ONEPIC DEMO BOARD, PLUS PICKIT 3; SVHC:No SVHC (19-Dec-2012) ;RoHS Compliant: Yes 制造商:Microchip Technology Inc 功能描述:One PIC MCU Platform Board with PICkit 3
DM164135 制造商:Microchip Technology Inc 功能描述:PICKIT 3 IN-CIRCUIT DEBUGGER
DM173001 功能描述:開發(fā)板和工具包 - PIC / DSPIC PICDEM 17 PIC17CXX RoHS:否 制造商:Microchip Technology 產(chǎn)品:Starter Kits 工具用于評估:chipKIT 核心:Uno32 接口類型: 工作電源電壓:
DM180021 功能描述:開發(fā)板和工具包 - PIC / DSPIC PIC18 Starter Kit RoHS:否 制造商:Microchip Technology 產(chǎn)品:Starter Kits 工具用于評估:chipKIT 核心:Uno32 接口類型: 工作電源電壓:
DM1800-434MB 功能描述:射頻模塊 DM1800 Base Station 433.92 MHz RoHS:否 制造商:Linx Technologies 產(chǎn)品:Transceiver Modules 頻帶:902 MHz to 928 MHz 輸出功率:- 15.5 dBm to + 12.5 dBm 接口類型:UART 工作電源電壓:- 0.3 VDC to + 5.5 VDC 傳輸供電電流:38.1 mA 接收供電電流:22.7 mA 天線連接器類型:U.FL 最大工作溫度:+ 85 C 尺寸:1.15 mm x 0.63 mm x 0.131 mm
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