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Programmable Hardware Manual (PHM)
© Tibbo Technology Inc.
Finally, option "-T" devices have a female wireless add-on port connector, which a
wireless add-on like WA2000 can be plugged into. EM1000 modules of "-T" variety
are intended for convenient testing and are not recommended for use in production
devices.
For further information on available EM1000 versions see
and
Specifications and Ordering Info
4.2.2.3
Ethernet Port Lines
ATTENTION! There are two different Ethernet magnetics arrangements: one for
original
EM1000-...- 00
, another one -- for the
EM1000-...- 01
.
Ethernet port of the EM1000 is of 100BaseT type. Onboard electronics of the
EM1000 do not include Ethernet magnetics, so magnetics circuitry must be
connected externally to pins TX+, TX-, RX+, RX-, and AVCC. The AVCC pin outputs
clean power for the magnetics circuitry, which is very sensitive to noise. The
voltage on the AVCC depends on the EM1000 version: 3.3V for EM1000-...- 00, 2.5V
for the EM1000-...- 01. Separate AGND analog ground pins have been added on the
EM1000-...- 01. For the EM1000-...- 00 there is no separate analog ground. Please,
note the following:
·
The AVCC is an output!
·
Do not combine AVCC with the VCC (main power) pin. On the EM1000-...- 00 this
is counter-productive, and on the EM1000-...- 01 this will apply wrong voltage to
the AVCC pin. Doing so appears to be causing no immediate permanent damage to
the EM1000-...- 01, but the circuit will not work and the effects of prolonged
over-voltage on the AVCC line are not known.
You can use either a standalone magnetics part (such as YCL-PH163112) or RJ45
connector with integrated magnetics (i.e. YCL-PTC1111-01G). Here are two
connection diagrams based on the YCL-PTC1111-01G -- one for the EM1000-...- 00,
another one - for the EM1000-...- 01.