CY7B923-SC Cypress Semiconductor Corp, CY7B923-SC Datasheet - Page 9

• Manufacturer Part Number: CY7B923-SC
• Description: TRANSMITTER HOTLINK 28-SOIC
• Manufacturer: Cypress Semiconductor Corp
• Series: HOTlink™r
• Type: Transmitter and Receiverr

Specifications of CY7B923-SC

• Protocol: Fibre Channel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Drivers/receivers: -
• Lead Free Status / Rohs Status: Not Compliant
• Other names: 428-1299

Document #: 38-02017 Rev. *C
Encoded Mode Operation
In Encoded mode the input data is interpreted as eight bits of
data (D0 – D7), a context control bit (SC/D), and a system
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 include all protocol characters necessary
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
restrictions upon the data encoding method is that it contain
suitable transition density for the Receiver PLL data synchro-
nizer (one per 10 bit byte), and that it be compatible with the
transmission media.
b-h
), SC/D (Da), and SVS (Dj) of pre-encoded transmission
ENA
CKR
HOTLINK TRANSMIT TER
ASYNCHRONOUS FIFO
ASYNCHRONOUS FIFO
CKW
HOTLINK RECEIVER
RDY
7C42X/3X/6X/7X
7C42X/3X/6X/7X
W
7B923
7B933
RP
R
Q
D
Figure 4. Seamless FIFO Interface
0
0
Q
D
0
0
7
7
,SC/D
,SC/D
9
9
8
8
to encode packets for Fibre Channel, ESCON, 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.
Data loaded into the Input register on the rising edge of CKW
will be loaded into the Shifter on the subsequent rising edges
of CKW. It will then be shifted to the outputs one bit at a time
using the internal clock generated by the clock generator. The
first bit of the transmission character (Da) will appear at the
output (OUTA±, OUTB±, and OUTC±) after the next CKW edge.
While in either the Encoded mode or Bypass mode, if a CKW
edge arrives when the inputs are not enabled (ENA and ENN
both HIGH), the Encoder will insert a pad character K28.5
(e.g., C5.0) to maintain proper link synchronization (in Bypass
ENR
ENN
CKR
CKW
HOTLINK TRANSMIT TER
HOTLINK RECEIVER
CKW
CKR
CLOCKED FIFO
CLOCKED FIFO
RDY
ENW
7C44X/5X
7C44X/5X
7B923
7B933
Q
D
0
0
Q
D
7-0
0
0
7
7
= 111 00000 and SC/D
,SC/D
,SC/D
9
8
8
9
CY7B923
CY7B933
Page 9 of 30
B923–21