收藏本站
参数资料
型号： PIC18F45J50T-I/ML
厂商： Microchip Technology
文件页数： 88/164页
文件大小： 0K
描述： IC PIC MCU FLASH 32KB 44-QFN
产品培训模块： PIC18 J Series MCU Overview
标准包装： 1,600
系列： PIC® XLP™ 18F
核心处理器： PIC
芯体尺寸： 8-位
速度： 48MHz
连通性： I²C，SPI，UART/USART，USB
外围设备： 欠压检测/复位，DMA，POR，PWM，WDT
输入/输出数： 34
程序存储器容量： 32KB（16K x 16）
程序存储器类型： 闪存
RAM 容量： 3.8K x 8
电压 - 电源 (Vcc/Vdd)： 2.15 V ~ 3.6 V
数据转换器： A/D 13x10b
振荡器型： 内部
工作温度： -40°C ~ 85°C
封装/外壳： 44-VQFN 裸露焊盘
包装： 带卷 (TR)
2011 Microchip Technology Inc.
DS39931D-page 35
PIC18F46J50 FAMILY
3.0
OSCILLATOR
CONFIGURATIONS
3.1
Overview
Devices in the PIC18F46J50 family incorporate a
different oscillator and microcontroller clock system
than general purpose PIC18F devices. Besides the
USB module, with its unique requirements for a stable
clock source, make it necessary to provide a separate
clock source that is compliant with both USB low-speed
and full-speed specifications.
The PIC18F46J50 family has additional prescalers and
postscalers, which have been added to accommodate
a wide range of oscillator frequencies. Figure 3-1
provides an overview of the oscillator structure.
Other oscillator features used in PIC18 enhanced
microcontrollers, such as the internal oscillator block
and clock switching, remain the same. They are
discussed later in this chapter.
3.1.1
OSCILLATOR CONTROL
The operation of the oscillator in PIC18F46J50 family
devices is controlled through three Configuration regis-
ters and two control registers. Configuration registers,
CONFIG1L, CONFIG1H and CONFIG2L, select the
oscillator mode, PLL prescaler and CPU divider
options. As Configuration bits, these are set when the
device is programmed and left in that configuration until
the device is reprogrammed.
The OSCCON register (Register 3-2) selects the Active
Clock mode; it is primarily used in controlling clock
switching in power-managed modes. Its use is
discussed in Section 3.5.1 “Oscillator Control
Register”
.
The OSCTUNE register (Register 3-1) is used to trim the
INTOSC
frequency
source,
and
select
the
low-frequency clock source that drives several special
features. The OSCTUNE register is also used to activate
or disable the Phase Locked Loop (PLL). Its use is
described in Section 3.2.5.1 “OSCTUNE Register”.
3.2
Oscillator Types
PIC18F46J50 family devices can be operated in eight
distinct oscillator modes. Users can program the
FOSC<2:0> Configuration bits to select one of the
modes listed in Table 3-1. For oscillator modes which
produce a clock output (CLKO) on pin RA6, the output
frequency will be one fourth of the peripheral clock
frequency. The clock output stops when in Sleep mode,
but will continue during Idle mode (see Figure 3-1).
TABLE 3-1:
OSCILLATOR MODES
Mode
Description
ECPLL
External Clock Input mode, the PLL can
be enabled or disabled in software,
CLKO on RA6, apply external clock
signal to RA7.
EC
External Clock Input mode, the PLL is
always disabled, CLKO on RA6, apply
external clock signal to RA7.
HSPLL
High-Speed Crystal/Resonator mode,
PLL can be enabled or disabled in
software, crystal/resonator connected
between RA6 and RA7.
HS
High-Speed Crystal/Resonator mode,
PLL always disabled, crystal/resonator
connected between RA6 and RA7.
INTOSCPLLO Internal Oscillator mode, PLL can be
enabled or disabled in software, CLKO
on RA6, port function on RA7, the
internal oscillator block is used to derive
both the primary clock source and the
postscaled internal clock.
INTOSCPLL
Internal Oscillator mode, PLL can be
enabled or disabled in software, port
function on RA6 and RA7, the internal
oscillator block is used to derive both the
primary clock source and the postscaled
internal clock.
INTOSCO
Internal Oscillator mode, PLL is always
disabled, CLKO on RA6, port function on
RA7, the output of the INTOSC
postscaler serves as both the postscaled
internal clock and the primary clock
source.
INTOSC
Internal Oscillator mode, PLL is always
disabled, port function on RA6 and RA7,
the output of the INTOSC postscaler
serves as both the postscaled internal
clock and the primary clock source.
相关PDF资料
PDF描述
PIC18LF45J50T-I/ML IC PIC MCU FLASH 32KB 44-QFN
PIC24F32KA304T-I/PT MCU 32KB FLASH 2KB RAM 44TQFP
PIC16LF1939-I/PT IC MCU 8BIT FLASH 44TQFP
PIC24FV32KA304T-I/PT MCU 32KB FLASH 2KB RAM 44TQFP
PIC18F45K80-E/ML MCU PIC 32KB FLASH ECAN 44QFN
相关代理商/技术参数
参数描述
PIC18F45K20-E/ML 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 25 I/O 8B RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F45K20-E/MV 功能描述:8位微控制器 -MCU 32KB FL 1536b RAM 8b Familynanowatt XLP RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F45K20-E/P 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 25 I/O 8B RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F45K20-E/PT 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 25 I/O 8B RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC18F45K20-I/ML 功能描述:8位微控制器 -MCU 32KB Flash 1536B RAM 25 I/O 8B RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*