Re: [ts-7000] NVRAM in RTC

[D V <>]

Hi Michael,

Thank you for the quick answer! You're perfect. The last 2 bytes are initialized to 0x55 and 0xAA, but the other 112 bytes remain untouched.

Cheers,
denx

---

From: Michael Schmidt <>
To:
Sent: Monday, 19 January, 2009 18:12:41
Subject: Re: [ts-7000] NVRAM in RTC

denx_ts wrote:
> Dear all,
>
> I have a TS-7250 SBC with the optional RTC. I made a small program
> which reads and writes a value to the last data register (#127) - if
> it's not the desired. But as I see every startup of the sbc resets
> this value. Why is this strange behavior?

The device driver is writing a couple values (something like 0xAA 0x55)
to the top two address of the RTC as part of the test to see if the RTC
is present.

> BR:
> denx

______ Best Regards,
|__ __/ Michael Schmidt
|| Software Engineer
||echnologic Systems (EmbeddedARM. com)
|| (480) 16525 East Laser Drive
|/ 837-5200 Fountain Hills, AZ 85268
http://oz.embeddeda rm.com/~michael

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