CY7B9334-270JC Cypress Semiconductor Corp, CY7B9334-270JC Datasheet - Page 16

• Manufacturer Part Number: CY7B9334-270JC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7B9334-270JC

• Lead Free Status / RoHS Status: Not Compliant

CY7B9234 SMPTE HOTLink Transmitter Operating Mode Description
In normal operation, the Transmitter can operate in either of two
modes. The Encoded mode allows a user to send and receive
eight (8) bit data and control information without first converting
it to transmission characters. The Bypass mode is used for
systems in which the encoding and decoding is performed in an
external protocol controller.
In either mode, data is loaded into the Input register of the Trans-
mitter on the rising edge of CKW. The input timing and functional
response of the Transmitter input can be made to match the
timing and functionality of either an asynchronous FIFO or a
clocked FIFO by an appropriate connection of input signals (See
Figure 5). Proper operation of the FIFO interface depends upon
various FIFO-specific access and response specifications.
Encoded Mode Operation
In Encoded mode the input data is interpreted as eight bits of
data (D
diagnostic input bit (SVS). If the context of the data is to be
normal message data, the SC/D input should be LOW, and the
data should be encoded using the valid data character set
described in the Valid Data Characters section of this datasheet.
If the context of the data is to be control or protocol information,
the SC/D input will be HIGH, and the data will be encoded using
the valid special character set described in the Valid Special
Character Codes and Sequences section. Special characters
Document #: 38-02014 Rev. *B
0
−D
7
), a context control bit (SC/D), and a system
include all protocol characters necessary to encode packets for
Fibre Channel, ESCON, DVB-ASI proprietary systems, and
diagnostic purposes.
The diagnostic characters and sequences available as Special
Characters include those for Fibre Channel link testing, as well
as codes to be used for testing system response to link errors
and timing. A Violation symbol can be explicitly sent as part of a
user data packet (i.e., send C0.7; D
1), or it can be sent in response to an external system using the
SVS input. This will allow system diagnostic logic to evaluate the
errors in an unambiguous manner, and will not require any
modification to the transmission interface to force transmission
errors for testing purposes.
Bypass Mode Operation
In Bypass mode the input data is interpreted as ten (10) bits
(D
data to be serialized and sent over the link. This data can use
any encoding method suitable to the designer. The only restric-
tions upon the data encoding method is that it contain suitable
transition density for the Receiver PLL data synchronizer (one
per 10 bit byte on average), and that it be compatible with the
transmission media. Occasional long run length data patterns >
20 bits are acceptable.
b-h
), SC/D (Da), and SVS (Dj) of pre-encoded transmission
7−0
= 111 00000 and SC/D =
CY7B9234
CY7B9334
Page 16 of 36
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