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CYP15G0401DXA
PRELIMINARY
Document #: 38-02002 Rev. *B
Page 7 of 48
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature..................................
–
65
°
C to +150
°
C
Ambient Temperature with
Power Applied.............................................
–
55
°
C to +125
°
C
Supply Voltage to Ground Potential...............
–
0.5V to +4.2V
DC Voltage Applied to LVTTL Outputs
in High-Z State.........................................
–
0.5V to V
CC
+0.5V
Output Current into LVTTL Outputs (LOW)..................30 mA
DC Input Voltage .....................................
–
0.5V to V
CC
+0.5V
Static Discharge Voltage
...............................................>
2001 V
(per MIL-STD-883, Method 3015)
Latch-Up Current
...........................................................>
200 mA
Operating Range
Range
Ambient
Temperature
0
°
C to +70
°
C
–
40
°
C to +85
°
C
V
CC
Commercial
Industrial
+3.3V
+
5%/
–
5%
+3.3V
+
5%/
–
5%
Pin Descriptions
CYP15G0401DXA Quad HOTLink II Transceiver
Name
I/O Characteristics
Signal Description
Transmit Path Data Signals
TXPERA
TXPERB
TXPERC
TXPERD
LVTTL Output,
changes relative to
REFCLK
↑
[1]
Transmit Path Parity Error. Active HIGH. Asserted (HIGH) if parity checking is enabled
character clock period to indicate detection of a parity error in the character presented
to the encoder.
If a parity error is detected, the character in error is replaced with a C0.7 character to
force a corresponding bad-character detection at the remote end of the link. This re-
placement takes place regardless of the encoded/non-encoded state of the interface.
When BIST is enabled for the specific transmit channel, BIST progress is presented on
these outputs. Once every 511 character times (plus a 16-character Word Sync Se-
quence when the receive channels are clocked by a common clock), the associated
TXPERx signal will pulse HIGH for one transmit-character clock period to indicate a
complete pass through the BIST sequence.
These outputs also provide indication of a transmit Phase-Align Buffer underflow or
overflow. When the transmit Phase-Align Buffers are enabled (TXCKSEL
≠
LOW, or
TXCKSEL = LOW and TXRATE = HIGH), if an underflow or overflow condition is detect-
ed, TXPERx for the channel in error is asserted and remains asserted until either an
atomic Word Sync Sequence is transmitted or TXRST is sampled LOW to re-center the
transmit Phase-Align Buffers.
Transmit Control. These inputs are captured on the rising edge of the transmit interface
clock (selected by TXCKSEL) and are passed to the encoder or transmit shifter. They
identify how the associated TXDx[7:0] characters are interpreted. When the encoder is
bypassed, these inputs are interpreted as data bits. When the encoder is enabled, these
inputs determine if the TXDx[7:0] character is encoded as Data, a Special Character
code, or replaced with other Special Character codes. See
Table 1
for details.
Transmit Data Inputs. These inputs are captured on the rising edge of the transmit
interface clock (selected by TXCKSEL) and passed to the encoder or transmit shifter.
When the encoder is enabled (TXMODE[1:0]
≠
LL), TXDx[7:0] specify the specific data
or command character to be sent.
TXCTA[1:0]
TXCTB[1:0]
TXCTC[1:0]
TXCTD[1:0]
LVTTL Input,
synchronous,
sampled by the
selected TXCLKx
↑
or REFCLK
↑
[1]
TXDA[7:0]
TXDB[7:0]
TXDC[7:0]
TXDD[7:0]
LVTTL Input,
synchronous,
sampled by the
selected TXCLKx
↑
or REFCLK
↑
[1]
LVTTL Input,
synchronous,
internal pull-up,
sampled by the
respective TXCLKx
↑
or REFCLK
↑
[1]
TXOPA
TXOPB
TXOPC
TXOPD
Transmit Path Odd Parity. When parity checking is enabled (PARCTL
≠
LOW), the parity
captured at these inputs is XORed with the data on the associated TXDx bus to verify
the integrity of the captured character.
Note:
1.
When REFCLK is configured for half-rate operation (TXRATE = HIGH), these inputs are sampled (or the outputs change) relative to both the rising and falling
edges of REFCLK.