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| 型号： | MSC1201Y3RHHRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQCC36 |
| 封装： | GREEN, PLASTIC, QFN-36 |
| 文件页数： | 22/93页 |
| 文件大小： | 1093K |
| 代理商： | MSC1201Y3RHHRG4 |
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MSC1200
MSC1201
MSC1202
SBAS317E APRIL 2004 REVISED MAY 2006
www.ti.com
29
PLL
In PLL mode (HCR2, CLKSEL = 101 or HCR2,
CLKSEL = 100), the CPU can execute from an external
32.768kHz crystal. This mode enables the use of a PLL
circuit that synthesizes the selected clock frequencies
(PLL LF mode or PLL HF mode). If an external clock is
detected at startup, then the CPU begins execution in PLL
mode after startup. If an external clock is not detected at
startup, then the device reverts to the mode shown in
Table 2. The status of the PLL can be determined by first
writing the PLLLOCK bit (enable) and then reading the
PLLLOCK status bit in the PLLH SFR.
The frequency of the PLL is preloaded with default
trimmed values. However, the PLL frequency can be
fine-tuned by writing to the PLLH and PLLL SFRs. The
equation for the PLL frequency is:
PLL Frequency = ([PLLH:PLLL] + 1)
fOSC
where fOSC = 32.768kHz.
The default value for PLL LF mode is automatically loaded
into the PLLH and PLLL SFRs.
For different connections to external clocks, see Figure 14,
Figure 15, and Figure 16.
For PLL HF mode, the value of PLL[9:0] is automatically
doubled in hardware; however, since PLL[9:0] is writable,
it can also be modified by writing to the respective SFRs.
XIN
XOUT
C
1
C
2
Refer to the crystal manufacturer’s specification
for C
1 and C2 values.
NOTE:
Figure 14. External Crystal Connection
XIN
External Clock
Figure 15. External Clock Connection
XOUT
XIN
32pF
32.768kHz
NOTE: Typical configuration is shown.
Figure 16. PLL Connection
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相关代理商/技术参数 |
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|---|---|
| MSC1201Y3RHHT | 功能描述:模数转换器 - ADC Precision ADC & DAC w/8051 CPU & Flash RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MSC1201Y3RHHTG4 | 功能描述:模数转换器 - ADC 8051 CPU w/8kB Mem 24B ADC Current DAC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MSC1202 | 制造商:BB 制造商全称:BB 功能描述:Precision, Analog-to-Digital Converter (ADC) and Digital-to-Analog Converter (DAC) with 8051 Microcontroller and Flash Memory |
| MSC1202EVM | 功能描述:数据转换 IC 开发工具 MSC1202EVM Eval Mod RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| MSC1202Y2 | 制造商:BB 制造商全称:BB 功能描述:Precision, Analog-to-Digital Converter (ADC) and Digital-to-Analog Converter (DAC) with 8051 Microcontroller and Flash Memory |
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