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Wednesday, October 14th 2009, 12:40pm

VRTC Pin Specifications

Q: Type of module? A: GC864
Q: Firmware version? A:
Q: Type of starter kit you have? S3

Hello all,

What is the minimum and maximum voltage levels for the VRTC pin?

I'm implementing a battery backup as per the RTC Backup Application Note and it recommends using the S-817 Seiko v-reg. However the S-817 has several different output voltages and it's not clear which it recommends.

For the Capacitor Backup section, it contradicts itself by specifying the VRTC minimum is 1.95V but also specifying that the minimum voltage for RTC functionality is 1.1V!

Which S-817 v-reg output voltage would you recommend using?

Kind Regards,



Wednesday, October 14th 2009, 1:08pm

RE: VRTC Pin Specifications

all information your are asking for you will find here:…20Backup_r2.pdf


Monday, October 26th 2009, 11:54am

RE: VRTC Pin Specifications

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