William,

The way I read the Datasheet, you see that the addresses are not 0-3 becaus=
e
the bit 0 is used for R/W selection. so you need to hardwire the keys with
0, 1, 2, 3 for each of the 4 chips, but the addresses are 0, 2, 4, 6 for re=
ading
and 1, 3, 5, 7 for writing.

Just my two cents,
Jean-Paul
N1JPL



> On Jan 13, 2016, at 3:04 PM, William Bross <wbross@cinci.rr.com> wrote:
>=20
> First off, I'm sorry to wake the list up.  Haven't seen anything for a=20
> few days.  I'm throwing this in [EE] because I'm having troubles with=20
> this IC, not the PIC32MX driving it.
>=20
> Does anybody on the list have any experience with this chip?
>=20
> <http://ams.com/eng/Products/Lighting-Management/LED-Driver-ICs/AS1117>
>=20
> The I2C comms, keys and LEDs all work fine.  My questions are about the=20
> self-addressing mode.  I have qty. 2 of these controllers attached to=20
> the PICs I2C1 port.  First thing after power up you send the data=20
> sequence ' 0x00, 0x2d' (or possibly '0x00,0x2d,0x00') and the=20
> controllers are supposed to look at their key inputs for SEGF and/or=20
> SEGG open/shorted to set an address of 0 to 3.  I've tried multiple=20
> combinations of addresses and self-addressing commands but both=20
> controllers only respond to data sent to address 0, the default address.
>=20
> Thanks,
> Bill
> --=20
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--=20
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