參數(shù)資料
型號： PIC18F4331-E/ML
廠商： Microchip Technology
文件頁數(shù)： 45/119頁
文件大?。?/td> 0K
描述： IC MCU FLASH 4KX16 44QFN
標準包裝： 45
系列： PIC® 18F
核心處理器： PIC
芯體尺寸： 8-位
速度： 40MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復(fù)位，LVD，電源控制 PWM，QEI，POR，PWM，WDT
輸入/輸出數(shù)： 36
程序存儲器容量： 8KB（4K x 16）
程序存儲器類型： 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量： 768 x 8
電壓 - 電源 (Vcc/Vdd)： 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 9x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 125°C
封裝/外殼： 44-VQFN 裸露焊盤
包裝： 管件
配用： I3-DB18F4431-ND - BOARD DAUGHTER ICEPIC3
2010 Microchip Technology Inc.
DS39616D-page 31
PIC18F2331/2431/4331/4431
3.4
External Clock Input
The EC and ECIO Oscillator modes require an external
clock source to be connected to the OSC1 pin. There is
no oscillator start-up time required after a Power-on
Reset or after an exit from Sleep mode.
In the EC 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 3-4 shows the pin connections for the EC
Oscillator mode.
FIGURE 3-4:
EXTERNAL CLOCK INPUT
OPERATION
(EC CONFIGURATION)
The ECIO Oscillator mode functions like the EC mode,
except that the OSC2 pin becomes an additional
general purpose I/O pin. The I/O pin becomes bit 6 of
PORTA (RA6). Figure 3-5 shows the pin connections
for the ECIO Oscillator mode.
FIGURE 3-5:
EXTERNAL CLOCK INPUT
OPERATION
(ECIO CONFIGURATION)
3.5
RC Oscillator
For timing-insensitive applications, the “RC” and “RCIO”
device options offer additional cost savings. The actual
oscillator frequency is a function of several factors:
Supply voltage
Values of the external resistor (REXT) and capacitor
(CEXT)
Operating temperature
Given the same device, operating voltage and tempera-
ture, and component values, there will also be unit-to-unit
frequency variations. These are due to factors, such as:
Normal manufacturing variation
Difference in lead frame capacitance between
package types (especially for low CEXT values)
Variations within the tolerance of limits of REXT
and CEXT
In the RC Oscillator mode (Figure 3-6), 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 3-6:
RC OSCILLATOR MODE
The RCIO Oscillator mode (Figure 3-7) 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).
FIGURE 3-7:
RCIO OSCILLATOR MODE
OSC1/CLKI
OSC2/CLKO
FOSC/4
Clock from
Ext. System
PIC18FXXXX
OSC1/CLKI
I/O (OSC2)
RA6
Clock from
Ext. System
PIC18FXXXX
OSC2/CLKO
CEXT
REXT
PIC18FXXXX
OSC1
FOSC/4
Internal
Clock
VDD
VSS
Recommended values: 3 k
REXT 100 k
CEXT > 20 pF
CEXT
REXT
PIC18FXXXX
OSC1
Internal
Clock
VDD
VSS
Recommended values: 3 k
REXT 100 k
CEXT > 20 pF
I/O (OSC2)
RA6
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PIC18F4331-I/ML 功能描述:8位微控制器 -MCU 8KB 768 RAM 34 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
PIC18F4331-I/P 功能描述:8位微控制器 -MCU 8KB 768 RAM 34 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
PIC18F4331-I/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU 18F4331 DIP40
PIC18F4331-I/PT 功能描述:8位微控制器 -MCU 8KB 768 RAM 34 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
PIC18F4331-I/PT 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU 18F4331 TQFP44
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