-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Aloha!
Fredrik Thulin wrote: > The suggestion has been made to remove the external RTC chip > currently on the Alpha schematics, and instead just rely on the RTC > inside the ARM. > > OK to remove external chip? The internal RTC is likely easier to > interface with, so it saves us engineering time. There were a few arguments for having a separate RTC: - - Compartmentalization. Divide functionality onto parts that are easier to test. - - Precision. The Microchip MCP79412 provides 1 ppm resolution and is very stable. - - Power consumption. The external chip consumes 925 nA at 3.0 on battery. What is the power consumption for the STM32 just running the internal RTC? - -- Med vänlig hälsning, Yours Joachim Strömbergson - Alltid i harmonisk svängning. ======================================================================== Joachim Strömbergson Secworks AB [email protected] ======================================================================== -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBCAAGBQJWswtuAAoJEF3cfFQkIuyN1lAP/1UQUQnWP0wfD8aAzE0G+meP k7ZXY1WqqBsJX5VohkiByG1+iVq2x2b6yp4Y4sEintcZaPYcPEJnRxv1102VYRQK NUKETJpXpVwfT3SS/udCAR/Ly99Pt6UHcVk/bNSVj3aqBlVjn1L/FV6WwlDzj4g4 PXJs9rQAb6ZsMqV962c1Pj/oyFXNuu/uSgRYrAUOqKHqh881wtquLIaGp88+7Di0 CBIDUyMXaEMJbdqp1f4qZK7TKsh0qg0tRw7C1romH6rTDYh+GAFUiiQ+xFopP7ig 8VbgDPK2N9amZitHFu67AUEi2ATbrcYP47YbeTBzgLz0UhP2W/KyEJLiiltvLU6m 7Ees2eibRx3hp7Mq1vR6yu781BZVGp36mabP3Vn3QTP6bKKl2iasnfMjI5qHU1Mo qwnfyKvb5cR9I9udUZ5x2gPFGFSJqC2ZIzfOEUB5G71i66HQOJYIQdEnqENGDJ0W gNWym4PkPxoz5hbdqO4SOIo/fTLOiv/I1bsaZv/R8bbrmQylFcmKhEWJhOFSHyG7 U7TN+pVqDHwupvYH5LzEqImN/2u5emDbUEvZq3PmoBcFo3Vk4q9Dt/j9foZ1ZP03 wxQ7/f04xIWQxK4ISntWEhj4Mh+t3iWtRZ76QxqZmj+sfJmmOi949wmMRQM/Q9fp t+3eIjZOvHGZ1/EKmwSM =0c0W -----END PGP SIGNATURE----- _______________________________________________ Tech mailing list [email protected] https://lists.cryptech.is/listinfo/tech
