参数资料
型号: PIC18F66J90-I/PT
厂商: Microchip Technology
文件页数: 29/59页
文件大小: 0K
描述: IC PIC MCU FLASH 64KB 64-TQFP
产品培训模块: PIC18 J Series MCU Overview
8-bit PIC® Microcontroller Portfolio
标准包装: 160
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 48MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,LCD,LVD,POR,PWM,WDT
输入/输出数: 51
程序存储器容量: 64KB(32K 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 V ~ 3.6 V
数据转换器: A/D 12x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-TQFP
包装: 托盘
产品目录页面: 644 (CN2011-ZH PDF)
配用: AC162079-ND - HEADER MPLAB ICD2 18F85J90 64/80
AC164328-ND - MODULE SKT FOR 80TQFP
2010 Microchip Technology Inc.
DS39933D-page 35
PIC18F87J90 FAMILY
3.0
OSCILLATOR
CONFIGURATIONS
3.1
Oscillator Types
The PIC18F87J90 family of devices can be operated in
eight different oscillator modes:
1.
ECPLL
OSC1/OSC2 as primary; ECPLL
oscillator with PLL enabled, CLKO on
RA6
2.
EC
OSC1/OSC2 as primary; external
clock with FOSC/4 output
3.
HSPLL
OSC1/OSC2 as primary; high-speed
crystal/resonator with software PLL
control
4.
HS
OSC1/OSC2 as primary; high-speed
crystal/resonator
5.
INTPLL1 Internal oscillator block with software
PLL control, FOSC/4 output on RA6
and I/O on RA7
6.
INTIO1
Internal oscillator block with FOSC/4
output on RA6 and I/O on RA7
7.
INTPLL2 Internal oscillator block with software
PLL control and I/O on RA6 and RA7
8.
INTIO2
Internal oscillator block with I/O on
RA6 and RA7
All of these modes are selected by the user by
programming the FOSC<2:0> Configuration bits.
In addition, PIC18F87J90 family devices can switch
between different clock sources, either under software
control or automatically under certain conditions. This
allows for additional power savings by managing
device clock speed in real time without resetting the
application.
The clock sources for the PIC18F87J90 family of
devices are shown in Figure 3-1.
FIGURE 3-1:
PIC18F87J90 FAMILY CLOCK DIAGRAM
4 x PLL
FOSC<2:0>
Secondary Oscillator
T1OSCEN
Enable
Oscillator
T1OSO
T1OSI
Clock Source Option
for Other Modules
OSC1
OSC2
Sleep
HSPLL, ECPLL, INTPLL
HS, EC
T1OSC
CPU
Peripherals
IDLEN
P
o
st
sc
aler
MU
X
MU
X
8 MHz
4 MHz
2 MHz
1 MHz
500 kHz
125 kHz
250 kHz
OSCCON<6:4>
111
110
101
100
011
010
001
000
31 kHz
INTRC
Source
Internal
Oscillator
Block
WDT, PWRT, FSCM
8 MHz
Internal Oscillator
(INTOSC)
OSCCON<6:4>
Clock
Control
OSCCON<1:0>
Source
8 MHz
31 kHz (INTRC)
0
1
OSCTUNE<7>
and Two-Speed Start-up
Primary Oscillator
OSCTUNE<6>
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