參數(shù)資料
型號： PIC17LC766T-08I/L
廠商： Microchip Technology
文件頁數(shù)： 40/159頁
文件大?。?/td> 0K
描述： IC MCU OTP 16KX16 A/D PWM 84PLCC
標(biāo)準(zhǔn)包裝： 300
系列： PIC® 17C
核心處理器： PIC
芯體尺寸： 8-位
速度： 8MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 66
程序存儲器容量： 32KB（16K x 16）
程序存儲器類型： OTP
RAM 容量： 902 x 8
電壓 - 電源 (Vcc/Vdd)： 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 16x10b
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 84-LCC（J 形引線）
包裝： 帶卷 (TR)
PIC17C7XX
DS30289B-page 18
2000 Microchip Technology Inc.
FIGURE 4-2:
CRYSTAL OR CERAMIC
RESONATOR OPERATION
(XT OR LF OSC
CONFIGURATION)
TABLE 4-1:
CAPACITOR SELECTION FOR
CERAMIC RESONATORS
FIGURE 4-3:
CRYSTAL OPERATION,
OVERTONE CRYSTALS
(XT OSC
CONFIGURATION)
TABLE 4-2:
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
Oscillator
Type
Resonator
Frequency
Capacitor Range
C1 = C2(1)
LF
455 kHz
2.0 MHz
15 - 68 pF
10 - 33 pF
XT
4.0 MHz
8.0 MHz
16.0 MHz
22 - 68 pF
33 - 100 pF
Higher capacitance increases the stability of the oscillator,
but also increases the start-up time. These values are for
design guidance only. Since each resonator has its own
characteristics, the user should consult the resonator manu-
facturer for appropriate values of external components.
Note
1:
These values include all board capacitances on
this pin. Actual capacitor value depends on
board capacitance.
Resonators Used:
455 kHz
Panasonic EFO-A455K04B
± 0.3%
2.0 MHz
Murata Erie CSA2.00MG
± 0.5%
4.0 MHz
Murata Erie CSA4.00MG
± 0.5%
8.0 MHz
Murata Erie CSA8.00MT
± 0.5%
16.0 MHz
Murata Erie CSA16.00MX
± 0.5%
Resonators used did not have built-in capacitors.
See Table 4-1 and Table 4-2 for recommended values of C1
and C2.
Note 1:
A series resistor (Rs) may be required for AT strip
cut crystals.
C1
C2
XTAL
OSC2
(Note 1)
OSC1
RF
SLEEP
PIC17CXXX
To internal
logic
Osc
Type
Freq
C1(2)
C2(2)
LF
32 kHz
1 MHz
2 MHz
100-150 pF
10-68 pF
100-150 pF
10-68 pF
XT
2 MHz
4 MHz
8 MHz
16 MHz
24 MHz(1)
32 MHz(1)
47-100 pF
15-68 pF
15-47 pF
10-47 pF
47-100 pF
15-68 pF
15-47 pF
10-47 pF
Higher capacitance increases the stability of the oscillator,
but also increases the start-up time and the oscillator cur-
rent. These values are for design guidance only. RS may be
required in XT mode to avoid overdriving the crystals with
low drive level specification. Since each crystal has its own
characteristics, the user should consult the crystal manufac-
turer for appropriate values for external components.
Note
1:
Overtone crystals are used at 24 MHz and
higher. The circuit in Figure 4-3 should be used
to select the desired harmonic frequency.
2: These values include all board capacitances on
this pin. Actual capacitor value depends on
board capacitance.
Crystals Used:
32.768 kHz
Epson C-001R32.768K-A
± 20 PPM
1.0 MHz
ECS-10-13-1
± 50 PPM
2.0 MHz
ECS-20-20-1
± 50 PPM
4.0 MHz
ECS-40-20-1
± 50 PPM
8.0 MHz
ECS ECS-80-S-4
ECS-80-18-1
± 50 PPM
16.0 MHz
ECS-160-20-1
± 50 PPM
25 MHz
CTS CTS25M
± 50 PPM
32 MHz
CRYSTEK HF-2
± 50 PPM
C1
C2
0.1
F
SLEEP
OSC2
OSC1
PIC17CXXX
To filter the fundamental frequency:
1
L1*C2
= (2
πf)2
Where f = tank circuit resonant frequency. This should be
midway between the fundamental and the 3rd overtone
frequencies of the crystal.
C3
C3 blocks DC current to ground.
L1
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