CYP15G0101DXB Cypress Semiconductor Corporation., CYP15G0101DXB Datasheet - Page 12

• Manufacturer Part Number: CYP15G0101DXB
• Description: Single-channel Hotlink Ii Transceiver
• Manufacturer: Cypress Semiconductor Corporation.

Document #: 38-02031 Rev. *J
When parity checking and the Encoder are both enabled
(TXMODE[1] ≠ LOW), the detection of a parity error causes a
C0.7 character of proper disparity to be passed to the Transmit
Shifter. When the Encoder is bypassed (TXMODE[1] = LOW),
detection of a parity error causes a positive disparity version
of a C0.7 transmission character to be passed to the Transmit
Shifter.
Table 2. Input Register Bits Checked for Parity
Encoder
The character, received from the Input Register or
Phase-Align Buffer and Parity Check Logic, is then passed to
the Encoder logic. This block interprets each character and
any control bits, and outputs a 10-bit transmission character.
Depending on the configured operating mode, the generated
transmission character may be
The selection of the specific characters generated are
controlled by the TXMODE[1:0], SCSEL, TXCT[1:0], and
TXD[7:0] inputs for each character.
Data Encoding
Raw data, as received directly from the Transmit Input
Register, is seldom in a form suitable for transmission across
Notes:
7.
8.
• the 10-bit pre-encoded character accepted in the Input
• the 10-bit equivalent of the eight-bit data character accepted
• the 10-bit equivalent of the eight -bit special character code
• the 10-bit equivalent of the C0.7 SVS character if parity
• the 10-bit equivalent of the C0.7 SVS character if a
• a character that is part of the 511-character BIST sequence
• a K28.5 character generated as an individual character or
TXCT[0]
TXCT[1]
Register
in the Input Register
accepted in the Input Register
checking was enabled and a parity error was detected
Phase-Align Buffer overflow or underflow error is present
as part of the 16-character Word Sync Sequence.
TXD[0]
TXD[1]
TXD[2]
TXD[3]
TXD[4]
TXD[5]
TXD[6]
TXD[7]
Signal
Name
TXOP
Bits marked as X are XORed together. Result must be a logic-1 for parity to be valid.
Transmit path parity errors are reported on the TXPER output.
LOW
Transmit Parity Check Mode (PARCTL)
TXMODE[1]
= LOW
X
X
X
X
X
X
X
X
X
X
X
[7]
MID
TXMODE[1]
≠ LOW
X
X
X
X
X
X
X
X
X
[8]
HIGH
X
X
X
X
X
X
X
X
X
X
X
a serial link. The characters must usually be processed or
transformed to guarantee
When the Encoder is enabled (TXMODE[1] ≠ LOW), the
characters to be transmitted are converted from Data or
Special Character codes to 10-bit transmission characters (as
selected by the TXCT[1:0] and SCSEL inputs), using an
integrated 8B/10B Encoder. When directed to encode the
character as a Special Character code, it is encoded using the
special character encoding rules listed in Table 21. When
directed to encode the character as a Data character, it is
encoded using the Data Character encoding rules in Table 20.
The 8B/10B Encoder is standards compliant with ANSI/NCITS
ASC X3.230-1994 (Fibre Channel), IEEE 802.3z (Gigabit
Ethernet), the IBM
Broadcast (DVB-ASI) standards for data transport.
Many of the Special Character codes listed in Table 21 may be
generated by more than one input character. The
CYP(V)(W)15G0101DXB
independent (but non-overlapping) Special Character code
tables. This allows the CYP(V)(W)15G0101DXB to operate in
mixed environments with other Cypress HOTLink devices
using the enhanced Cypress command code set, and the
reduced command sets of other non-Cypress devices. Even
when used in an environment that normally uses non-Cypress
Special Character codes, the selective use of Cypress
command codes can permit operation where running disparity
and error handling must be managed.
Following conversion of each input character from eight bits to
a 10-bit transmission character, it is passed to the Transmit
Shifter and is shifted out LSB first, as required by ANSI and
IEEE standards for 8B/10B coded serial data streams.
Transmit Modes
The operating mode of the transmit path is set through the
TXMODE[1:0] inputs. These 3-level select inputs allow one of
nine transmit modes to be selected. The transmit modes are
listed in Table 3.
The encoded modes (TX Modes 3 through 8) support multiple
encoding tables. These encoding tables vary by the specific
combinations of SCSEL, TXCT[1], and TXCT[0] that are used
to control the generation of data and control characters. These
multiple encoding forms allow maximum flexibility in inter-
facing to legacy applications, while also supporting numerous
extensions in capabilities.TX Mode 0—Encoder Bypass
When the Encoder is bypassed, the character captured from
the TXD[7:0] and TXCT[1:0] inputs is passed directly to the
Transmit Shifter without modification. If parity checking is
enabled (PARCTL ≠ LOW) and a parity error is detected, the
10-bit character is replaced with the 1001111000 pattern
(+C0.7 character) regardless of the running disparity of the
previous character.
• a minimum transition density (to allow the serial receive PLL
• a DC-balance in the signaling (to prevent baseline wander)
• run-length limits in the serial data (to limit the bandwidth of
• the remote receiver a way of determining the correct
to extract a clock from the data stream)
the link)
character boundaries (framing).

ESCON
is

CYW15G0101DXB
and FICON™, and Digital Video
CYV15G0101DXB
CYP15G0101DXB
designed
to
Page 12 of 39
support
two
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