Fwd: Adding a system management MPU

[Wolfgang Spraul]

fyi

Begin forwarded message:

> From: Milosch Meriac <meriac at openmoko.org>
> Date: March 19, 2008 7:23:31 AM GMT+08:00
> To: Werner Almesberger <werner at openmoko.org>
> Subject: Re: Adding a system management MPU
>
> Dear Werner,
>
> Werner Almesberger wrote:
>
>> Milosch Meriac wrote:
>>> Funnily I chose a very similar chip for my Ebook Reader design -  
>>> the MSP420F233 (dirt cheap and a supports lot of peripherals).  
>>> Basically it allowed me to stick to a cheap PMU.
>> Cool. I it seems that you're happy with the chip family ?
>
> Yep - the MSP430F233 has many great features:
>
> http://focus.ti.com/docs/prod/folders/print/msp430f233.html
>
> * 16-Bit RISC Architecture, 62.5-ns Instruction Cycle Time
> * Active Mode: 270 µA at 1 MHz, 2.2 V
> * Standby Mode (VLO): 0.3 µA
> * Off Mode (RAM Retention): 0.1 µA
> * Ultra-Fast Wake-Up From Standby in <1µs
> * Internal Calibrated Frequencies to ±1%
> * fast 12-Bit Analog-to-Digital (A/D) Converter (!) with
>  Sample-and-Hold (!!)
>
> But there is one big drawback: The gcc based http://mspgcc.sourceforge.net/ 
>  compiler provides only support for few selected chips. This is not  
> a particular problem because the free closed source compiler version  
> supports it fully (8K flash) - But it sucks to compile the code in  
> Windows.
>
> Warmest regards,
> --
> Milosch

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