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Re: [Discuss-gnuradio] New FrontEnd Schematic & Layout
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] New FrontEnd Schematic & Layout |
Date: |
Thu, 26 Feb 2004 22:39:17 -0800 |
User-agent: |
Mutt/1.4.1i |
On Thu, Feb 26, 2004 at 08:38:11PM -0800, cfk wrote:
> Dear Guys:
> The way the programming of the I2C address works is that if pin 11 is
> grounded, the tuner responds to an address of 0xC0. If that same pin is left
> open, it responds to an address of 0xC2. If that pin is held halfway between
> ground and +5V, it responds to an address of 0xC4 and if the same pin is
> connected to +5V, it responds to an address of 0xC6.
Nice job on the board!
I just want to clear up one thing with the I2C addresses. They are 7
bits, not 8. What the 4702 data sheet is calling the address isn't
really the address. It's the address shifted left one bit with a zero
(indicating a WRITE) in the low bit.
The real addresses are 0x60, 0x61, 0x62 and 0x63.
In order for the software to work, the correct addresses must be used.
Eric
- Re: [Discuss-gnuradio] FrontEnd4702 take 2, (continued)
- Re: [Discuss-gnuradio] FrontEnd4702 take 2, Matt Ettus, 2004/02/25
- Re: [Discuss-gnuradio] FrontEnd4702 take 2, John Gilmore, 2004/02/25
- Re: [Discuss-gnuradio] FrontEnd4702 take 2, Eric Blossom, 2004/02/25
- Re: [Discuss-gnuradio] FrontEnd4702 take 2, Matt Ettus, 2004/02/25
- Re: [Discuss-gnuradio] FrontEnd4702 take 29, Eric Blossom, 2004/02/25
- Re: [Discuss-gnuradio] FrontEnd4702 take 29, Matt Ettus, 2004/02/25
- Re: [Discuss-gnuradio] FrontEnd4702 take 2, Matt Ettus, 2004/02/25
- [Discuss-gnuradio] Better link to front end layout, cfk, 2004/02/25
- Re: [Discuss-gnuradio] Better link to front end layout, Matt Ettus, 2004/02/26
- [Discuss-gnuradio] New FrontEnd Schematic & Layout, cfk, 2004/02/26
- Re: [Discuss-gnuradio] New FrontEnd Schematic & Layout,
Eric Blossom <=
- Re: [Discuss-gnuradio] FrontEnd4702 take 2, John Gilmore, 2004/02/25
- Re: [Discuss-gnuradio] frontend4702 schematic and layout, Eric Blossom, 2004/02/24
- Re: [Discuss-gnuradio] frontend4702 schematic and layout, Matt Ettus, 2004/02/24