BT8222EPFF CONEXANT [Conexant Systems, Inc], BT8222EPFF Datasheet - Page 77

• Manufacturer Part Number: BT8222EPFF
• Description: ATM Transmitter/Receiver with UTOPIA Interface
• Manufacturer: CONEXANT [Conexant Systems, Inc]

CN8223
ATM Transmitter/Receiver with UTOPIA Interface
2.7.5 UTOPIA Interface
100046C
matching the idle header and mask criteria are automatically screened from
appearing on the output of all ports.
for the individual ports. Only addressed ports have active strobes.
The CN8223 incorporates an interface that is compliant with both the ATM
Forum UTOPIA Level 1 (Version 2.01) Specification and the Saturn Compliant
Interface for ATM PHY Devices Specification.
device with all input and output of cell data taking place on Port 0.
Configurations for ports 1, 2, and 3 (such as header values and masks or rate
controls) are ignored when in UTOPIA mode. The header values, masks, rate
controls, and other per-port configuration control bits for Port 0 govern the
operation of the UTOPIA port cell stream.
depth of four cells and is programmable for reduced latency requirements per
ATM Forum document 94/0317. UTOPIA interface pins are listed in
Control Register 1)
timing for the UTOPIA interface is functionally compatible with the timing
shown in the Version 2.01 ATM Forum Specification. Detailed timing
information can be found in
Table 2-27. UTOPIA Interface Pins
TxData (7:0)
TxPrty 0
TxSOC
TxEnb~
TxClk
TxFull~/TxClav
RxData (7:0)
RxPrty 0
RxSOC
RxEnb~
RxClk
RxEmpty~/RxClav
—
—
RcvFifoOverflow
If Delete Idle Cells [bit 2] of CONFIG_4 [0x29] is set, then received cells
This idle cell screening is in addition to any reject values that are programmed
When the UTOPIA interface is enabled, the CN8223 becomes a single port
The UTOPIA interface contains transmit and receive buffer FIFOs with a
The UTOPIA interface is controlled by
UTOPIA Signal
and
Conexant
0x2C—UTOPIA_2 (Utopia Port Control Register
FDAT_IN[7:0]
FDAT_IN[8]
FCTRL_IN[0]
FCTRL_IN[1]
FCTRL_IN[2]
FCTRL_OUT[2]
FDAT_OUT[7:0]
FDAT_OUT[8]
FCTRL_OUT[0]
FCTRL_IN[3]
FCTRL_IN[4]
FCTRL_OUT[1]
FCTRL_IN[5:7]
FCTRL_OUT[16:4]
FCTRL_OUT[3]
Chapter
CN8223 Pin
4.0.
0x2B—UTOPIA_1 (Utopia Port
Signal Direction Relative to
Reserved, Connect to Ground
2.7 FIFO Port/UTOPIA Interface
2.0 Functional Description
Undefined Output
CN8223
Out
Out
Out
Out
Out
Out
In
In
In
In
In
In
In
Table
2). The
2-27.
2-43