参数资料
型号: PIC16F716-I/ML
厂商: Microchip Technology
文件页数: 99/136页
文件大小: 0K
描述: IC PIC MCU FLASH 2KX14 28QFN
标准包装: 61
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 13
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
数据转换器: A/D 4x8b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 28-VQFN 裸露焊盘
包装: 管件
2007 Microchip Technology Inc.
DS41206B-page 63
PIC16F716
9.2
Oscillator Configurations
9.2.1
OSCILLATOR TYPES
The PIC16F716 can be operated in four different
oscillator modes. The user can program two Configura-
tion bits (FOSC1 and FOSC0) to select one of these
four modes:
LP – Low-power Crystal
XT – Crystal/Resonator
HS – High-speed Crystal/Resonator
RC – Resistor/Capacitor
9.2.2
CRYSTAL OSCILLATOR/CERAMIC
RESONATORS
In XT, LP or HS modes, a crystal or ceramic resonator
is connected to the OSC1/CLKIN and OSC2/CLKOUT
pins
to
establish
oscillation
The
PIC16F716 oscillator design requires the use of a
parallel cut crystal. Use of a series cut crystal may give
a frequency out of the crystal manufacturers
specifications. When in XT, LP or HS modes, the
device can have an external clock source to drive the
OSC1/CLKIN pin (Figure 9-2).
FIGURE 9-1:
CRYSTAL/CERAMIC
RESONATOR OPERATION
(HS, XT OR LP
OSC CONFIGURATION)
FIGURE 9-2:
EXTERNAL CLOCK INPUT
OPERATION (HS, XT OR
LP OSC
CONFIGURATION)
TABLE 9-1:
CERAMIC RESONATORS
TABLE 9-2:
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
Note 1:
recommended values of C1 and C2.
2:
A series resistor (RS) may be required.
3:
RF varies with the crystal chosen.
C1(1)
C2(1)
XTAL
OSC2
OSC1
RF(3)
Sleep
To
logic
PIC16F716
RS(2)
internal
OSC1
OSC2
Open
Clock from
ext. system
PIC16F716
Ranges Tested:
Mode
Freq
OSC1 (C1)
OSC2 (C2)
XT
455 kHz
2.0 MHz
68-100 pF
15-68 pF
68-100 pF
15-68 pF
HS
4.0 MHz
8.0 MHz
16.0 MHz
10-68 pF
15-68 pF
10-22 pF
10-68 pF
15-68 pF
10-22 pF
Note 1: These values are for design guidance
only. See notes at bottom of page.
Osc Type
Crystal
Freq
Cap. Range
C1
Cap. Range
C2
LP
32 kHz
15-33 pF
200 kHz
5-10 pF
XT
200 kHz
47-68 pF
1 MHz
15-33 pF
4 MHz
15-33 pF
HS
4 MHz
15-33 pF
8 MHz
15-33 pF
20 MHz
15-33 pF
Note 1:
These values are for design guidance only.
See notes at bottom of page.
Note 1: Higher capacitance increases the stability
of the oscillator, but also increases the
start-up time.
2: Since each resonator/crystal has its own
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate
values
of
external
components.
3: RS may be required to avoid overdriving
crystals with low drive level specification.
4: When using an external clock for the
OSC1 input, loading of the OSC2 pin
must be kept to a minimum by leaving the
OSC2 pin unconnected.
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