參數(shù)資料
型號(hào)： PIC12C672-10/SM
廠商： Microchip Technology
文件頁數(shù)： 80/129頁
文件大?。?/td> 0K
描述： IC MCU OTP 2KX14 A/D 8-SOIJ
產(chǎn)品培訓(xùn)模塊： Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝： 90
系列： PIC® 12C
核心處理器： PIC
芯體尺寸： 8-位
速度： 10MHz
外圍設(shè)備： POR，WDT
輸入/輸出數(shù)： 5
程序存儲(chǔ)器容量： 3.5KB（2K x 14）
程序存儲(chǔ)器類型： OTP
RAM 容量： 128 x 8
電壓 - 電源 (Vcc/Vdd)： 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 4x8b
振蕩器型： 內(nèi)部
工作溫度： 0°C ~ 70°C
封裝/外殼： 8-SOIC（0.209"，5.30mm 寬）
包裝： 管件
配用： XLT08SO-1-ND - SOCKET TRANSITION 8SOIC 150/208
AC164312-ND - MODULE SKT FOR PM3 16SOIC
ISPICR1-ND - ADAPTER IN-CIRCUIT PROGRAMMING
309-1048-ND - ADAPTER 8-SOIC TO 8-DIP
309-1047-ND - ADAPTER 8-SOIC TO 8-DIP
AC124001-ND - MODULE SKT PROMATEII 8DIP/SOIC
其它名稱： PIC12C672-10/SMR
PIC12C672-10/SMR-ND
PIC12C67X
DS30561B-page 54
1999 Microchip Technology Inc.
9.2
Oscillator Configurations
9.2.1
OSCILLATOR TYPES
The PIC12C67X can be operated in seven different
oscillator
modes.
The user can program three
configuration bits (FOSC<2:0>) to select one of these
seven modes:
LP:
Low Power Crystal
HS:
High Speed Crystal/Resonator
XT:
Crystal/Resonator
INTRC*:
Internal 4 MHz Oscillator
EXTRC*: External Resistor/Capacitor
*Can be configured to support CLKOUT
9.2.2
CRYSTAL OSCILLATOR / CERAMIC
RESONATORS
In XT, HS or LP modes, a crystal or ceramic resonator
is connected to the GP5/OSC1/CLKIN and GP4/OSC2
pins
to
establish
oscillation
The
PIC12C67X 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, HS or LP modes, the
device can have an external clock source drive the
GP5/OSC1/CLKIN pin (Figure 9-2).
FIGURE 9-1:
CRYSTAL OPERATION
(OR CERAMIC RESONATOR)
(XT, HS OR LP OSC
CONFIGURATION)
FIGURE 9-2:
EXTERNAL CLOCK INPUT
OPERATION (XT, HS OR LP
OSC CONFIGURATION)
Note 1:
See Capacitor Selection tables for
recommended values of C1 and C2.
2: A series resistor (RS) may be required for AT
strip cut crystals.
3: RF varies with the oscillator mode selected
(approx. value = 10 M
).
C1(1)
C2(1)
XTAL
OSC2
OSC1
RF(3)
SLEEP
To internal
logic
RS(2)
PIC12C67X
Clock from
ext. system
OSC1
OSC2
PIC12C67X
Open
TABLE 9-1:
CAPACITOR SELECTION
FOR CERAMIC RESONATORS
- PIC12C67X
TABLE 9-2:
CAPACITOR SELECTION
FOR CRYSTAL OSCILLATOR
- PIC12C67X
Osc
Type
Resonator
Freq
Cap. Range
C1
Cap. Range
C2
XT
455 kHz
2.0 MHz
4.0 MHz
22-100 pF
15-68 pF
22-100 pF
15-68 pF
HS
4.0 MHz
8.0 MHz
10.0 MHz
15-68 pF
10-68 pF
10-22 pF
15-68 pF
10-68 pF
10-22 pF
These values are for design guidance only. Since
each resonator has its own characteristics, the user
should consult the resonator manufacturer for
appropriate values of external components.
Osc
Type
Resonator
Freq
Cap. Range
C1
Cap. Range
C2
LP
32 kHz(1)
100 kHz
200 kHz
15 pF
15-30 pF
15 pF
30-47 pF
15-82 pF
XT
100 kHz
200 kHz
455 kHz
1 MHz
2 MHz
4 MHz
15-30 pF
15-47 pF
200-300 pF
100-200 pF
15-100 pF
15-30 pF
15-47 pF
HS
4 MHz
8 MHz
10 MHz
15-30 pF
Note 1:
For VDD > 4.5V, C1 = C2
≈ 30 pF is
recommended.
These values are for design guidance only. Rs may
be required in HS mode, as well as XT mode, to
avoid overdriving crystals with low drive level specifi-
cation. Since each crystal has its own characteris-
tics, the user should consult the crystal manufacturer
for appropriate values of external components.
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