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FWIXP422BB Datasheet(PDF) 42 Page - Intel Corporation

Part # FWIXP422BB
Description  Intel짰 IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
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Manufacturer  INTEL [Intel Corporation]
Direct Link  http://www.intel.com
Logo INTEL - Intel Corporation

FWIXP422BB Datasheet(HTML) 42 Page - Intel Corporation

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Intel® IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
March 2005
Datasheet
42
Document Number: 252479, Revision: 005
Table 11.
UTOPIA-2 Interface (Sheet 1 of 2)
Name
Power
On
Reset1
Reset2
Type
Description
UTP_OP_CLK
Z
VI
I
UTOPIA Transmit clock input. Also known as
UTP_TX_CLK. This signal is used to synchronize all
UTOPIA-transmit outputs to the rising edge of the
UTP_OP_CLK.
This signal should be pulled low through a 10-K
Ω resistor
when not being utilized in the system.
UTP_OP_FCO
Z
Z
O
UTOPIA flow control output signal. Also known as the
TXENB_N signal.
Used to inform the selected PHY that data is being
transmitted to the PHY. Placing the PHY’s address on the
UTP_OP_ADDR — and bringing UTP_OP_FCO to logic
1, during the current clock — followed by the
UTP_OP_FCO going to a logic 0, on the next clock cycle,
selects which PHY is active in MPHY mode.
In SPHY configurations, UTP_OP_FCO is used to inform
the PHY that the processor is ready to send data.
UTP_OP_SOC
Z
Z
O
Start of Cell. Also known as TX_SOC.
Active high signal is asserted when UTP_OP_DATA
contains the first valid byte of a transmitted cell.
UTP_OP_DATA[7:0]
Z
Z
O
UTOPIA output data. Also known as UTP_TX_DATA.
Used to send data from the
processor to an ATM UTOPIA-
Level-2-compliant PHY.
UTP_OP_ADDR[4:0]
Z
VI
O
Transmit PHY address bus. Used by the
processor when
operating in MPHY mode to poll and select a single PHY
at any given time.
UTP_OP_FCI
Z
VI
I
UTOPIA Output data flow control input: Also known as the
TXFULL/CLAV signal.
Used to inform the processor of the ability of each polled
PHY to receive a complete cell. For cell-level flow control
in an MPHY environment, TxClav is an active high tri-
stateable signal from the MPHY to ATM layer. The
UTP_OP_FCI, which is connected to multiple MPHY
devices, will see logic high generated by the PHY, one
clock after the given PHY address is asserted — when a
full cell can be received by the PHY. The UTP_OP_FCI
will see a logic low generated by the PHY one clock cycle,
after the PHY address is asserted — if a full cell cannot be
received by the PHY.
This signal should be tied low through a 10-K
Ω resistor if
not being used.
UTP_IP_CLK
Z
VI
I
UTOPIA Receive clock input. Also known as
UTP_RX_CLK.
This signal is used to synchronize all UTOPIA-received
inputs to the rising edge of the UTP_IP_CLK.
This signal should be pulled low through a 10-K
Ω resistor
when not being utilized in the system.
1.
While PWRON_RESET_N is deasserted use Power On Reset column for the pin state.
2.
After deassertion of PWRON_RESET_N, and deassertion of RESET_IN_N, and assertion of
PLL_LOCK, all signals reflect the value shown in the RESET column.
For a legend of the Type codes, see Table 5 on page 33.


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