




产品详情资料
, HSDIV和N1,则可以使用以下程序从串行端口直接写入设备:1.冻结DCO(寄存器137的4位)2.将新的频率配置(RFREQ、HSDIV、N1)写入具有20 ppm和50 ppm温度稳定性的所有Si571设备和Si570设备的地址7–12;或者对于具有7ppm温度稳定性的Si570器件,地址为13–18。3.解冻DCO,并在12页表11“编程约束和定时”中规定的大解冻到NewFreq超时内断言NewFreq位(寄存器135的位6)。冻结和解冻DCO的过程将导致输出时钟在时钟周期内的任意点瞬间停止和启动。此过程可能需要10毫秒。在写入新的频率配置后,可能必须重置对故障或短脉冲敏感的电路。示例:生成156.25 MHz的Si570必须重新配置以生成161.1328125 MHz时钟(156.25 MHzx66/64)。该频率变化大于±3500 ppm。fout=156.25 MHz读取RFREQ、HS_DIV、N1的电流值:RFREQ电流=0x2BC011EB8h=11744124600d、11744124600 d x 228=43.7502734363d HS_DIV=4 N1=8计算fXTAL、fDCO_cHSDIV, and N1 are determined, they can be written directly into the device from the serial port using the following procedure: 1. Freeze the DCO (bit 4 of Register 137) 2. Write the new frequency configuration (RFREQ, HSDIV, and N1) to addresses 7–12 for all Si571 devices and Si570 devices with 20 ppm and 50 ppm temperature stability; or addresses 13–18 for Si570 devices with 7 ppm temperature stability. 3. Unfreeze the DCO and assert the NewFreq bit (bit 6 of Register 135) within the maximum Unfreeze to NewFreq Timeout specified in Table 11, “Programming Constraints and Timing,” on page 12. The process of freezing and unfreezing the DCO will cause the output clock to momentarily stop and start at any arbitrary point during a clock cycle. This process can take up to 10 ms. Circuitry that is sensitive to glitches or runt pulses may have to be reset after the new frequency configuration is written. Example: An Si570 generating 156.25 MHz must be re-configured to generate a 161.1328125 MHz clock (156.25 MHz x 66/64). This frequency change is greater than ±3500 ppm. fout = 156.25 MHz Read the current values for RFREQ, HS_DIV, N1: RFREQcurrent = 0x2BC011EB8h = 11744124600d, 11744124600d x 228 = 43.7502734363d HS_DIV = 4 N1 = 8 Calculate fXTAL, fDCO_c
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主营产品简介
专注于DCS、PLC、机器人控制系统、大型伺服四大系统领域。
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●使用前:
在操作和维护,安装设备之前,请阅读并严格遵守安全相关的信息。
Read and strictly follow safety-related information before operatingmaintainingand installing equipment.
●使用者要求:
必须从事安装,组装或维护设备等相关工控电气机械以及其他相关技术的人员。
Must be engaged in the installation,assembly or maintenance of equipment and other related industriacontroeectrica machinery and other related technica personne.应用范围:
应用于品牌本系列工业以及生产生活自动化设备产品。
Used in the brand of this series of industriaand production automation eauipment products
适用于场景:系统集成,非标定制,产线升级改造,原设备电气替换等等。
Suitable for scenarios:system integration,non-standard customizationproduction line upgrading and transformation,electrical replacement of original equipment,etc.
●操作人员:
应该由本品牌专业培训操作员来安装、操作和维修设备。专业人员具有技术能力强,熟悉安全信息和安全实施:
熟悉设备的安装加工、操作和维护:熟悉处理所有的潜在危险情况。
Equipment should be installed,operated and maintained by trained operators from the brand
●危险情况
警告
.请注意使用人员的人身安全。
●除了产品特性以及功能,还需了解产品的使用寿命环境。
●充分学习产品使用手册,否则非专业人员可能会造成人身危险。
Study the product instruction manual thoroughlyotherwise it may cause personal danger to non-professionals.
●服务行业
适用水泥,木业,石业,橡胶,石油,化工,发电,环保,水处理,制冷,交通,钢铁,食品,饮料,船舶,制冷等行业
Applicable to cementwood,stone,rubber,petroleumchemical, power generation,
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