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    參數(shù)資料
    

    


    


    
型號(hào)：
COP8SGG928D3

    

    
廠商：
National Semiconductor Corporation

    

    
英文描述：
Aluminum Electrolytic Radial Lead 5mm Length Capacitor; Capacitance: 33uF; Voltage: 6.3V; Case Size: 5x5 mm; Packaging: Bulk

    

    
中文描述：
8位的CMOS基于ROM和OTP微控制器具有8K到32K的內(nèi)存，2個(gè)比較器和USART

    

    
文件頁(yè)數(shù)：
20/62頁(yè)

    

    
文件大?。?/td>
913K

    

    
代理商：
COP8SGG928D3


    

    

    

	
    
    
    

    
    
	
    5.0 Functional Description
    (Continued)
    5.10 OSCILLATOR CIRCUITS
    There are four clock oscillator options available: Crystal
    Oscillator with or without on-chip bias resistor, R/C Oscillator
    with on-chip resistor and capacitor, and External Oscillator.
    The oscillator feature is selected by programming the ECON
    register, which is summarized in Table 1
    TABLE 1. Oscillator Option
    ECON4
    0
    1
    0
    1
    ECON3
    0
    0
    1
    1
    Oscillator Option
    External Oscillator
    Crystal Oscillator without Bias Resistor
    R/C Oscillator
    Crystal Oscillator with Bias Resistor
    5.10.1 Crystal Oscillator
    The crystal Oscillator mode can be selected by programming
    ECON Bit 4 to 1. CKI is the clock input while G7/CKO is the
    clock generator output to the crystal. An on-chip bias resistor
    connected between CKI and CKO can be enabled by pro-
    gramming ECON Bit 3 to 1 with the crystal oscillator option
    selection. The value of the resistor is in the range of 0.5M to
    2M (typically 1.0M). Table 2 shows the component values
    required for various standard crystal values. Resistor R2 is
    only used when the on-chip bias resistor is disabled. Figure
    12 shows the crystal oscillator connection diagram.
    TABLE 2. Crystal Oscillator Configuration,
    T
    A
    = 25C, V
    CC
    = 5V
    R1 (k
    )
    R2 (M
    )
    C1 (pF)
    C2 (pF)
    CKI Freq.
    (MHz)
    15
    10
    4
    0.455
    0
    0
    0
    1
    1
    1
    1
    18
    20
    25
    100
    18
    20
    25
    5.6
    100–156
    5.10.2 External Oscillator
    The External Oscillator mode can be selected by program-
    ming ECON Bit 3 to 0 and ECON Bit 4 to 0. CKI can be
    driven by an external clock signal provided it meets the
    specified duty cycle, rise and fall times, and input levels.
    G7/CKO is available as a general purpose input G7 and/or
    Halt control. Figure 13 shows the external oscillator connec-
    tion diagram.
    5.10.3 R/C Oscillator
    The R/C Oscillator mode can be selected by programming
    ECON Bit 3 to 1 and ECON Bit 4 to 0. In R/C oscillation
    mode, CKI is left floating, while G7/CKO is available as a
    general purpose input G7 and/or HALT control. The R/C
    controlled oscillator has on-chip resistor and capacitor for
    maximum R/C oscillator frequency operation. The maximum
    frequency is 5 MHz
     ±
     35% for V
    between 4.5V to 5.5V
    and temperature range of 40C to +85C. For max fre-
    quency operation, the CKI pin should be left floating. For
    lower frequencies, an external capacitor should be con-
    nected between CKI and either V
    or GND. Immunity of the
    R/C oscillator to external noise can be improved by connect-
    ing one half the external capacitance to V
    and one half to
    GND. PC board trace length on the CKI pin should be kept
    as short as possible. Table 3 shows the oscillator frequency
    as a function of external capacitance on the CKI pin. Figure
    14 shows the R/C oscillator configuration.
    TABLE 3. R/C Oscillator Configuration,
    40C to +85C, V
    = 4.5V to 5.5V,
    OSC Freq. Variation of
     ±
     35%
    External
    Capacitor (pF)*
    0
    9
    52
    125
    6100
    * Assumes 3-5 pF board capacitance.
    R/C OSC Freq
    (MHz)
    5
    4
    2
    1
    32 kHz
    Instr. Cycle (μs)
    2.0
    2.5
    5.0
    10
    312.5
    With On-Chip Bias Resistor
    Without On-Chip Bias Resistor
    10131717
    10131718
    FIGURE 12. Crystal Oscillator
    C
    www.national.com
    20
    
    
    
    
    
    


    


    

    相關(guān)PDF資料
    		

    PDF描述
    		

    
    

    
COP8SGG928D6
8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART

    

    
COP8SGG928D7
Aluminum Electrolytic Radial Lead 5mm Length Capacitor; Capacitance: 47uF; Voltage: 6.3V; Case Size: 5x5 mm; Packaging: Bulk

    

    
COP8SGG928D8
8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART

    

    
COP8SGG928D9
8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART

    

    
COP8SGG928L3
8-Bit CMOS ROM Based and OTP Microcontrollers with 8k to 32k Memory, Two Comparators and USART

    

    

    

    


    


    

    相關(guān)代理商/技術(shù)參數(shù)
    		

    參數(shù)描述
    		

    
    

    
COP8SGR728M7
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
COP8SGR728M7/NOPB
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
COP8SGR728M8
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
COP8SGR728M8/NOPB
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
COP8SGR728N8
功能描述:8位微控制器 -MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT

    

    
    
    
    
	
    	
    
    
     
     
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