Lpc2000

I am starting a new design with the LPC2106. I will also have an FPGA 
running at 1.5 volts. I would like to use the 1.5 volts for the LPC 
core voltage. The data sheet shows a some range in the core voltage 
but I have not seen any other postings in this regard. Does anyone 
have experience with this topic.

----- Original Message ----- 

From: "pfwilliamsmts" <pfwilliams@...>
To: <lpc2000@yahoogroups.com>
Sent: Tuesday, November 08, 2005 6:33 PM
Subject: [lpc2000] Can I run the core voltage at 1.5 volts


>I am starting a new design with the LPC2106. I will also have an FPGA
> running at 1.5 volts. I would like to use the 1.5 volts for the LPC
> core voltage. The data sheet shows a some range in the core voltage
> but I have not seen any other postings in this regard. Does anyone
> have experience with this topic.

FPGAs can take very large peak currents, several amps in many cases. It 
would be a good idea to have separate regulators.

Leon 

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--- In lpc2000@yahoogroups.com, "pfwilliamsmts" <pfwilliams@h...> 
wrote:
>
> I am starting a new design with the LPC2106. I will also have an 
FPGA 
> running at 1.5 volts. I would like to use the 1.5 volts for the 
LPC 
> core voltage. The data sheet shows a some range in the core 
voltage 
> but I have not seen any other postings in this regard. Does anyone 
> have experience with this topic.
>

The datasheet, in section 8 table 9 lists the range of voltages as:

VDD1.8 1.65V MIN, 1.8V, 1.95V MAX
VDD3.3 3.0V MIN, 3.3V, 3.6V MAX

I think you are out of luck.  I would design for the middle value 
and hope to remain within the boundaries.

Richard