推荐其他几颗CC2640上用的24M晶振http://processors.wiki.ti.com/index.php/CC26xx_Crystals
如果自己选其他型号的话，参考这篇文档 http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=swra495&fileType=pdf
• Crystals must be selected to meet CC26xx and CC13xx data sheet or specification requirements
– ESR must not be greater than can be driven by
– CC26xx and CC13xx (60 Ω for the 24-MHz crystal). Capacitive loading and frequency tolerance
must meet the specifications of the standard used (for example, Bluetooth)
– Motional inductance must also meet specifications. Many crystal manufactures provide only
motional inductance data upon customer request. TI has tested crystals with motional inductances
up to the value specified in the CC2650 SimpleLink ™ Multistandard Wireless MCU data sheet
(SWRS158).
• Configuring the device
– The required tuning capacitance of the 24-MHz crystal cannot lie outside of 2 – 11 pF unless
external tuning capacitors are used.
NOTE: To achieve reliable results, keep the required tuning capacitance from 5 to 9 pF though a
wider tuning range can be set.
• Some other considerations when selecting a crystal include the following:
– To improve start-up time and reduce power consumption, the crystal must have the following:
• Low-capacitive loading, at the expense of greater susceptability to frequency variation caused
by the environment
• Low-motional inductance
• Low-motional resistance
推荐其他几颗CC2640上用的24M晶振http://processors.wiki.ti.com/index.php/CC26xx_Crystals
如果自己选其他型号的话，参考这篇文档 http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=swra495&fileType=pdf
• Crystals must be selected to meet CC26xx and CC13xx data sheet or specification requirements
– ESR must not be greater than can be driven by
– CC26xx and CC13xx (60 Ω for the 24-MHz crystal). Capacitive loading and frequency tolerance
must meet the specifications of the standard used (for example, Bluetooth)
– Motional inductance must also meet specifications. Many crystal manufactures provide only
motional inductance data upon customer request. TI has tested crystals with motional inductances
up to the value specified in the CC2650 SimpleLink ™ Multistandard Wireless MCU data sheet
(SWRS158).
• Configuring the device
– The required tuning capacitance of the 24-MHz crystal cannot lie outside of 2 – 11 pF unless
external tuning capacitors are used.
NOTE: To achieve reliable results, keep the required tuning capacitance from 5 to 9 pF though a
wider tuning range can be set.
• Some other considerations when selecting a crystal include the following:
– To improve start-up time and reduce power consumption, the crystal must have the following:
• Low-capacitive loading, at the expense of greater susceptability to frequency variation caused
by the environment
• Low-motional inductance
• Low-motional resistance
举报
