ST7lite05 external clock connection?

terryhao · ‎2002-11-22

Posted on November 22, 2002 at 15:46

terryhao · ‎2002-11-21

Posted on November 22, 2002 at 01:48

I want to use a crystal oscillator in ST7lite05. But I don't know how to connect? Could you give me a hand?

Terry Hao

terryhao@citiz.net

p239955_stm1_stmicro_com · ‎2002-11-22

Posted on November 22, 2002 at 09:00

ST7Flite0 has been specifically designed to be used with the embedded internal 1% RC. Therefore crystal isn't expected to be used with this device and no dedicated pins are available.

Feel free to use the internal RC + PLLx4x8 to reach your CPU frequency: 1, 4, or 8MHz.

Pierre

maxime2399 · ‎2002-11-22

Posted on November 22, 2002 at 15:46

The lite05 cannot drive a crystal directly but can accept a logic CMOS level Clock. In this configuration you can either use an external clock chip or build your own using inverters.

I found the enclosed application note from Epson very useful for my own oscillator design.

________________

Attachments :

O_D_guide.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I02K&d=%2Fa%2F0X0000000bU0%2FtuVXXrojKuDMr8.b5N0epK9VCsz8bgPNdzpgnVH6n1U&asPdf=false