參數(shù)資料
型號(hào)： MC68CK331CAG16
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 15/84頁(yè)
文件大?。?/td> 0K
描述： IC MCU 32BIT 144-LQFP
標(biāo)準(zhǔn)包裝： 60
系列： M683xx
核心處理器： CPU32
芯體尺寸： 32-位
速度： 16MHz
連通性： EBI/EMI，SCI，SPI，UART/USART
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 18
程序存儲(chǔ)器類型： ROMless
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 144-LQFP
包裝： 托盤
22
MC68331TS/D
Figure 7 System Clock Block Diagram
3.3.1 Clock Sources
The state of the clock mode (MODCLK) pin during reset determines the clock source. When MODCLK
is held high during reset, the clock synthesizer generates a clock signal from either a crystal oscillator
or an external reference input. Clock synthesizer control register SYNCR determines operating frequen-
cy and various modes of operation. When MODCLK is held low during reset, the clock synthesizer is
disabled, and an external system clock signal must be applied. When the synthesizer is disabled, SYN-
CR control bits have no effect.
A reference crystal must be connected between the EXTAL and XTAL pins to use the internal oscillator.
Use of a 32.768-kHz crystal is recommended. These crystals are inexpensive and readily available. If
an external reference signal or an external system clock signal is applied through the EXTAL pin, the
XTAL pin must be left floating. External reference signal frequency must be less than or equal to max-
imum specified reference frequency. External system clock signal frequency must be less than or equal
to maximum specified system clock frequency.
When an external system clock signal is applied (i.e., the PLL is not used), duty cycle of the input is
critical, especially at near maximum operating frequencies. The relationship between clock signal duty
cycle and clock signal period is expressed:
Minimum external clock period =
minimum external clock high/low time
50% — percentage variation of external clock input duty cycle
SYS CLOCK
BLOCK 32KHZ
CLKOUT
EXTAL
PHASE
COMPARATOR
LOW-PASS
FILTER
VCO
CRYSTAL
OSCILLATOR
SYSTEM
CLOCK
SYSTEM CLOCK CONTROL
XTAL
XFC PIN
VDDSYN
XFC
0.1
F
0.01
F
0.1
F
FEEDBACK DIVIDER
22 pF
10M
330K
1. MUST BE LOW-LEAKAGE CAPACITOR (INSULATION RESISTANCE 30,000 M
OR GREATER).
2. RESISTANCE AND CAPACITANCE BASED ON A TEST CIRCUIT CONSTRUCTED WITH A DAISHINKU DMX-38 32.768-kHz CRYSTAL.
SPECIFIC COMPONENTS MUST BE BASED ON CRYSTAL TYPE. CONTACT CRYSTAL VENDOR FOR EXACT CIRCUIT.
VDDSYN
22
W
X
Y
1
VSSI
R3
R4
32.768 KHz
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關(guān)PDF資料
PDF描述
MCHC705B16NVFNE IC MCU 8BIT 15K OTP 52-PLCC
MC9S08RD8FJE IC MCU 8BIT 8K FLASH 32-LQFP
VI-26W-IY-F2 CONVERTER MOD DC/DC 5.5V 50W
VI-26W-IY-F1 CONVERTER MOD DC/DC 5.5V 50W
VI-26V-IY-F3 CONVERTER MOD DC/DC 5.8V 50W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68CK338 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:32-Bit Modular Microcontroller
MC68CK338CPV14 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68CK338CPV14B1 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:32-Bit Modular Microcontroller
MC68CM16Z1 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series
MC68CM16Z1CFC16 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*