參數(shù)資料
型號: PIC18LF46K22-I/ML
廠商: Microchip Technology
文件頁數(shù): 29/71頁
文件大小: 0K
描述: IC PIC MCU 64KB FLASH 44QFN
產品培訓模塊: 8-bit PIC® Microcontroller Portfolio
標準包裝: 45
系列: PIC® XLP™ 18F
核心處理器: PIC
芯體尺寸: 8-位
速度: 64MHz
連通性: I²C,SPI,UART/USART
外圍設備: 欠壓檢測/復位,HLVD,POR,PWM,WDT
輸入/輸出數(shù): 35
程序存儲器容量: 64KB(32K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量: 3.8K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 3.6 V
數(shù)據(jù)轉換器: A/D 30x10b
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-VQFN 裸露焊盤
包裝: 管件
2010-2012 Microchip Technology Inc.
DS41412E-page 35
PIC18(L)F2X/4XK22
2.5.3
LP, XT, HS MODES
The LP, XT and HS modes support the use of quartz
crystal resonators or ceramic resonators connected to
OSC1 and OSC2 (Figure 2-6). The mode selects a low,
medium or high gain setting of the internal inverter-
amplifier to support various resonator types and speed.
LP Oscillator mode selects the lowest gain setting of the
internal inverter-amplifier. LP mode current consumption
is the least of the three modes. This mode is best suited
to drive resonators with a low drive level specification, for
example, tuning fork type crystals.
XT Oscillator mode selects the intermediate gain
setting of the internal inverter-amplifier. XT mode
current consumption is the medium of the three modes.
This mode is best suited to drive resonators with a
medium drive level specification.
HS Oscillator mode offers a Medium Power (MP) and a
High Power (HP) option selectable by the FOSC<3:0>
bits. The MP selections are best suited for oscillator
frequencies between 4 MHz and 16 MHz. The HP
selection has the highest gain setting of the internal
inverter-amplifier and is best suited for frequencies
above 16 MHz. HS mode is best suited for resonators
that require a high drive setting.
FIGURE 2-6:
QUARTZ CRYSTAL
OPERATION (LP, XT OR
HS MODE)
FIGURE 2-7:
CERAMIC RESONATOR
OPERATION
(XT OR HS MODE)
Note 1:
A series resistor (RS) may be required for
quartz crystals with low drive level.
2:
The value of RF varies with the Oscillator mode
selected (typically between 2 M
to 10 M.
C1
C2
Quartz
RS(1)
OSC1/CLKIN
RF(2)
Sleep
To Internal
Logic
PIC MCU
Crystal
OSC2/CLKOUT
Note 1: Quartz
crystal
characteristics
vary
according
to
type,
package
and
manufacturer. The user should consult the
manufacturer data sheets for specifications
and recommended application.
2: Always verify oscillator performance over
the VDD and temperature range that is
expected for the application.
3: For oscillator design assistance, refer to the
following Microchip Application Notes:
AN826, “Crystal Oscillator Basics and
Crystal Selection for rfPIC and PIC
Devices” (DS00826)
AN849, “Basic PIC Oscillator Design”
(DS00849)
AN943, “Practical PIC Oscillator
Analysis and Design” (DS00943)
AN949, “Making Your Oscillator Work”
(DS00949)
Note
1: A series resistor (RS) may be required for
ceramic resonators with low drive level.
2: The value of RF varies with the Oscillator mode
selected (typically between 2 M
to 10 M.
3: An additional parallel feedback resistor (RP)
may be required for proper ceramic resonator
operation.
C1
C2 Ceramic
RS(1)
OSC1/CLKIN
RF(2)
Sleep
To Internal
Logic
PIC MCU
RP(3)
Resonator
OSC2/CLKOUT
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