ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
Fiber optic transceiver (FOT) connections:
• Keep the traces between the ADSP-BF549 processor and
the FOT as short as possible.
• The receive data trace connecting the FOT receive data
output pin to the ADSP-BF549 PH6/MRX input pin should
have a 0 Ω series termination resistor placed close to the
FOT receive data output pin. Typically, the edge rate of the
FOT receive data signal driven by the FOT is very slow, and
further degradation of the edge rate is not desirable.
• The transmit data trace connecting the ADSP-BF549
PH5/MTX output pin to the FOT transmit data input pin
should have a 27 Ω series termination resistor placed close
to the ADSP-BF549 PH5/MTX pin.
• The receive data trace and the transmit data trace between
the ADSP-BF549 processor and the FOT should not be
routed close to each other in parallel over long distances to
avoid crosstalk.
RELATED DOCUMENTS
The following publications that describe the ADSP-BF54x
Blackfin processors (and related processors) can be ordered
from any Analog Devices sales office or accessed electronically
on www.analog.com:
• ADSP-BF54x Blackfin Processor Hardware Reference, Vol-
ume 1 and Volume 2
• Blackfin Processor Programming Reference
• ADSP-BF542/BF544/BF547/BF548/BF549
Blackfin Anomaly List
LOCKBOX SECURE TECHNOLOGY DISCLAIMER
Analog Devices products containing Lockbox Secure Technol-
ogy are warranted by Analog Devices as detailed in the Analog
Devices Standard Terms and Conditions of Sale. To our knowl-
edge, the Lockbox secure technology, when used in accordance
with the data sheet and hardware reference manual specifica-
tions, provides a secure method of implementing code and data
safeguards. However, Analog Devices does not guarantee that
this technology provides absolute security. ACCORDINGLY,
ANALOG DEVICES HEREBY DISCLAIMS ANY AND ALL
EXPRESS AND IMPLIED WARRANTIES THAT THE LOCK-
BOX SECURE TECHNOLOGY CANNOT BE BREACHED,
COMPROMISED, OR OTHERWISE CIRCUMVENTED AND
IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR
ANY LOSS, DAMAGE, DESTRUCTION, OR RELEASE OF
DATA, INFORMATION, PHYSICAL PROPERTY, OR INTEL-
LECTUAL PROPERTY.
Rev. C
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Page 24 of 100
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February 2010
ADI [ ADI ]
