[time-nuts] Rb Oscillator - rather fundamental question
phk at phk.freebsd.dk
Tue Feb 23 22:22:15 UTC 2010
In message <4B845267.8080009 at smiffytech.com>, Matthew Smith writes:
>BTW: does anyone know if a 0.55V p-t-p sine wave from an Rb source would
>be enough to clock an Atmel AVR microcontroller? The crystal/clock
>input *is* an amplifier, but didn't know if I'd need to do anything to
>the signal first, to get it closer to the 5V logic level.
No experience with Atmels, but Microchip's PIC18 work OK, but you
may have to AC-couple the signal and bias it to 1.mumble volts
with a couple of resistors.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
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