AFBR-57F5PZ Avago Technologies US Inc., AFBR-57F5PZ Datasheet - Page 6

• Manufacturer Part Number: AFBR-57F5PZ
• Description: 56T4982
• Manufacturer: Avago Technologies US Inc.

Specifications of AFBR-57F5PZ

• Applications: Fibre Channel And ISCSI HBA Cards
• Data Rate Max: 14.025Gbps
• Supply Voltage: 3.8V
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Special Operation Functions:
Figure 2a. OWRAP Function
Electrical and optical high speed data “wrap” functions are enabled to assist with local host or remote diagnostic and
optimization sequences. Optical data wrap (OWRAP) takes a received optical signal through a CDR jitter cleanup and
retransmits it optically out. Electrical data wrap (EWRAP) takes an incoming electrical signal through a CDR jitter cleanup
and retransmits it electrically out. An optional pass-through function is available to transmit outbound the wrapped
information, controlled through i2c commands.
Figure 2c.
The electrical SFP input stage (TD +/-) has been enhanced with features to allow host control and optimization of the
transceiver’s input equalization settings. The host can then select, in situ, the most appropriate SFP setting for a given
interconnect scenario.
The SFP electrical output stage (RD+/-) has been enhanced with variable output emphasis features to allow host control
and optimization of the receiver’s output settings. The host can then select, in situ, the most appropriate SFP setting for
a given interconnect scenario. To assist with optimizing the receiver output setting, the user can have data transmitted
by the SFP to a host ASIC by using EWRAP to loop back host generated traffi c or can use a remotely generated optical
signal as a data source for SFP and interconnect training.
Table 2. Rate Select Function
Note: During Fibre Channel Link Speed Negotiation sequences, the host will control Tx Rate and Rx Rate inputs separately to accomplish link initial-
ization. Once speed negotiation is complete, it is expected both Tx Rate and Rx Rate will be placed in the same state by the host.
6
Function
Rx Rate Select
RS(0)
Tx Rate Select
RS(1)
Amp
Pre
Amp
Pre
SFP Tx Variable Input Electrical EQ (i2c controlled)
Driver
Laser
Post
Amp
Driver
Laser
State
High
Low
High
Low
Post
Amp
ality (i2c controlled)
CDR
CDR
Rx
Tx
Explanation
Receive Rate Select HIGH engages the internal Rx CDR. The CDR will look for valid 16GFC traffi c and
lock within 500us when found. Due to diff erences in coding, this CDR will not be able to lock on valid
8GFC or 4GFC traffi c.
Receive Rate Select LOW bypasses the internal Rx CDR. This is intended for use only with 8GFC and
4GFC traffi c. When set low, the SFP behaves like a legacy SFP.
Transmit Rate Select HIGH engages the internal Tx CDR. The CDR will look for valid 16GFC traffi c and
lock within 500us when found. Due to diff erences in coding, this CDR will not be able to lock on valid
8GFC or 4GFC traffi c.
Transmit Rate Select LOW bypasses the internal Tx CDR. This is intended for use only with 8GFC and
4GFC traffi c. When set low, the SFP behaves like a legacy SFP.
CDR
CDR
Rx
Tx
μcontroller
μcontroller
Rx Vout &
Emphasis
Rx Vout &
Emphasis
Tx EQ
Tx EQ
i2c setting
Figure 2b.
Figure 2d.
Amp
Pre
Amp
Pre
EWRAP Function
SFP Rx Variable Output Electrical Emphasis (i2c controlled)
Driver
Laser
Amp
Post
Driver
Laser
Post
Amp
ality (i2c controlled)
CDR
CDR
Rx
CDR
Tx
CDR
Rx
Tx
μcontroller
μcontroller
Rx Vout &
Emphasis
Rx Vout &
Emphasis
Tx EQ
Tx EQ
i2c setting