CYV15G0201DXB-BBI Cypress Semiconductor Corp, CYV15G0201DXB-BBI Datasheet - Page 13

• Manufacturer Part Number: CYV15G0201DXB-BBI
• Manufacturer: Cypress Semiconductor Corp

Specifications of CYV15G0201DXB-BBI

• Lead Free Status / RoHS Status: Not Compliant

Document #: 38-02058 Rev. *H
Parity Support
In addition to the ten data and control bits that are captured at
each transmit Input Register, a TXOPx input is also available
on each channel. This allows the CYP(V)(W)15G0201DXB to
support ODD parity checking for each channel. This parity
checking is available for all operating modes (including
Encoder Bypass). The specific mode of parity checking is
controlled by the PARCTL input, and operates per Table 2.
Table 2. Input Register Bits Checked for Parity
When PARCTL is MID (open) and the Encoders are enabled
(TXMODE[1] ≠ L), only the TXDx[7:0] data bits are checked for
ODD parity along with the associated TXOPx bit. When
PARCTL = HIGH with the Encoder enabled (or MID with the
Encoder bypassed), the TXDx[7:0] and TXCTx[1:0] inputs are
checked for ODD parity along with the associated TXOPx bit.
When PARCTL = LOW, parity checking is disabled.
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.
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 associated control bits, and outputs a 10-bit transmission
character.
Depending on the configured operating mode, the generated
transmission character may be
Notes:
7.
8.
• the 10-bit pre-encoded character accepted in the Input
• the 10-bit equivalent of the 8-bit Data character accepted in
• the 10-bit equivalent of the 8-bit Special Character code
TXCTx[0]
TXCTx[1]
TXDx[0]
TXDx[1]
TXDx[2]
TXDx[3]
TXDx[4]
TXDx[5]
TXDx[6]
TXDx[7]
Register
the Input Register
accepted in the Input Register
TXOPx
Signal
Name
Transmit path parity errors are reported on the associated TXPERx output.
Bits marked as X are XORed together. Result must be a logic-1 for parity to be valid.
LOW
Transmit Parity Check Mode (PARCTL)
TXMODE[1]
= LOW
X
X
X
X
X
X
X
X
X
X
X
[8]
MID
TXMODE[1]
≠ LOW
X
X
X
X
X
X
X
X
X
[7]
HIGH
X
X
X
X
X
X
X
X
X
X
X
The selection of the specific characters generated is controlled
by the TXMODE[1:0], SCSEL, TXCTx[1:0], and TXDx[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
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 their respective TXCTx[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 25. When
directed to encode the character as a Data character, it is
encoded using the Data Character encoding rules in Table 24.
The 8B/10B Encoder is standards compliant with ANSI/NCITS
ASC X3.230-1994 (Fibre Channel), IEEE 802.3z (Gigabit
Ethernet), the IBM
Digital Video Broadcast DVB-ASI standards for data transport.
Many of the Special Character codes listed in Table 25 may be
generated by more than one input character. The
CYP(V)(W)15G0201DXB
independent (but non-overlapping) Special Character code
tables. This allows the CYP(V)(W)15G0201DXB to operate in
mixed environments with other CYP(V)(W)15G0201DXBs
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 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
• 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
• the remote receiver a way of determining the correct
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.
to extract a clock from the data stream)
requirements of the serial link)
character boundaries (framing).
®
ESCON
is
CYW15G0201DXB
®
CYP15G0201DXB
CYV15G0201DXB
designed
and FICON
to
®
channels, and
Page 13 of 46
support
two
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