Lpc2000

--- In lpc2000@yahoogroups.com, "mark_dell555" <mark_dell555@y...> 
wrote:
>
> +---+---+----------+-------+---------+-------+
> |PLL|MAM| SYS CLCK | FLASH | CURRENT | SPEED |
> +---+---+----------+-------+---------+-------+
> | 4 | 3 | 59.0 Mhz | 51 ns | 56.5 mA | 100 % |
> | 4 | 2 | 59.0 Mhz | 34 ns | 59.0 mA | 116 % |
> | 5 | 4 | 73.7 Mhz | 54 ns | 65.0 mA | 108 % |
> | 5 | 3 | 73.7 Mhz | 41 ns | 67.3 mA | 123 % |
> | 6 | 3 | 88.6 Mhz | 34 ns | 79.9 mA | 146 %*| 
> | 6 | 4 | 88.6 Mhz | 45 ns | 00.0 mA | 000 %&|
> | 6 | 5 | 88.6 Mhz | 56 ns | 71.9 mA | 108 %@|
> +---+---+----------+-------+---------+-------+
> 
> * Unstable - Freeze in under 60 seconds.
> & Could not start up.
> @ Other issue (BAD UART TX / duplicate characters)

Very interesting!  It'll also be interesting if you can try that 
10MHz PLC to see if you can get 80MHz.  I wonder how much 
variability there is between chips (i.e. it may work on your chip, 
but what about others, and vice versa).  I've been running into a 
bit of speed issues that this would help to alleviate.

What code and what method are you using to do the benchmarks?  I.e. 
what is the speed actually measuring?  You mentioned your LED flash 
app.  Are you just measuring how fast the LED flashes, or...?