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參數資料
型號: MC68332GCFVV16
廠商: Motorola, Inc.
英文描述: 32-Bit Modular Microcontroller
中文描述: 32位微控制器模塊
文件頁數: 23/88頁
文件大?。?/td> 446K
代理商: MC68332GCFVV16
MC68332
MC68332TS/D
MOTOROLA
23
3.3 System Clock
The system clock in the SIM provides timing signals for the IMB modules and for an external peripheral
bus. Because MCU operation is fully static, register and memory contents are not affected when the
clock rate changes. System hardware and software support changes in the clock rate during operation.
The system clock signal can be generated in three ways. An internal phase-locked loop can synthesize
the clock from an internal or external frequency source, or the clock signal can be input from an external
source.
Following is a block diagram of the clock submodule.
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.
SYS CLOCK
BLOCK 32KHZ
CLKOUT
EXTAL
PHASE
COMPARATOR
LOW-PASS
FILTER
VCO
CRYSTAL
OSCILLATOR
SYSTEM
CLOCK
SYSTEM CLOCK CONTROL
XTAL
XFC PIN
VDDSYN
XFC1
0.1
μ
F
.01
μ
F
0.1
μ
F
FEEDBACK DIVIDER
22 pF2
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.
W
Y
X
VSSI
22 pF2
VSSI
VSSI
VDDSYN
相關PDF資料
PDF描述
MC68332GMFC16 32-Bit Modular Microcontroller
MC68332GMFC20 32-Bit Modular Microcontroller
MC68332GMFV16 32-Bit Modular Microcontroller
MC68332GMFVV20 32-Bit Modular Microcontroller
MC68332GVFC16 32-Bit Modular Microcontroller
相關代理商/技術參數
參數描述
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MC68332GCPV16B1 功能描述:IC MCU 32BIT 16MHZ 144-LQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:M683xx 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN,SCI,SPI 外圍設備:POR,PWM,溫度傳感器,WDT 輸入/輸出數:21 程序存儲器容量:40KB(20K x 16) 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數據轉換器:A/D 6x12b 振蕩器型:內部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
MC68332GCPV20 功能描述:IC MCU 32BIT 20MHZ GMASK 144LQFP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:M683xx 其它有關文件:STM32F101T8 View All Specifications 特色產品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C,IrDA,LIN,SPI,UART/USART 外圍設備:DMA,PDR,POR,PVD,PWM,溫度傳感器,WDT 輸入/輸出數:26 程序存儲器容量:64KB(64K x 8) 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數據轉換器:A/D 10x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN,36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
MC68332GMEH16 功能描述:32位微控制器 - MCU 32B MCU 2KRAM TPU QSM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數據總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數據 RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風格:SMD/SMT
MC68332GMEH20 功能描述:32位微控制器 - MCU 32B MCU 2KRAM TPU QSM RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數據總線寬度:32 bit 最大時鐘頻率:90 MHz 程序存儲器大小:64 KB 數據 RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風格:SMD/SMT
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