TXC-06880BIOG Transwitch Corporation, TXC-06880BIOG Datasheet - Page 17

• Manufacturer Part Number: TXC-06880BIOG
• Manufacturer: Transwitch Corporation

Specifications of TXC-06880BIOG

• Operating Supply Voltage (typ): 1.8/3.3V
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

PRELIMINARY TXC-06880-MB, Ed. 4
February 2005
2.1.7.1 PHY Mode
Figure 7. Envoy-CE2 in PHY Layer Mode
In PHY layer mode, the following SPI-3 interface naming convention is used, per the OIF
SPI-3 specification. Packets received at the Ethernet receive interface, are stored in the
Ingress FIFO and transmitted on the SPI-3 Rx interface (SPI-3 output for Envoy-CE2).
Packets received at the SPI-3 Tx interface (SPI-3 input for Envoy-CE2), are stored in the
Egress FIFO and transmitted on the Ethernet transmit interface.
In PHY layer mode, space availability per channel for Transmit Interface (PTPA/STPA) is
asserted when a programmable number of bytes or more, are available for storage in the
Egress FIFO. The de-assertion of space availability is also programmable and is indicated
when a programmed number of bytes are available for storage in the Egress FIFO (near-full
condition). For PTPA, the programmable values for the assertion and de-assertion of the
signal are 8 to 2040 bytes. For STPA, the programmable values for assertion and de-
assertion are 2 to 255 bytes in 8-bit SPI-3 mode, 4 to 510 bytes in 16-bit SPI-3 mode, and 8 to
1020 bytes in 32-bit SPI-3 mode. In the Receive direction (SPI-3 output), one of the channels
will be selected for frame transfer, based on a round robin algorithm. Packet data may be
transferred across the Receive Interface in chunks, programmable from 8 to 2040 bytes, in 8
byte increments. In the Receive direction (SPI-3 output), the time between consecutive
transfers (pause) is programmable to 0 or 2 cycles.
Device
Layer
Link
- Functional Description -
RDAT[31:0]
TDAT[31:0]
RMOD[1:0]
TMOD[1:0]
TADR[7:0]
RPRTY
TPRTY
RFCLK
TFCLK
RENB
RSOP
REOP
RERR
TENB
TSOP
TEOP
TERR
STPA
PTPA
RVAL
RSX
TSX
ISPICLK
ISPITENB
ISPID[31:0]
ISPIPRTY
ISPISOP
ISPIEOP
ISPIERR
ISPITSX
ISPIMOD[1:0]
OSPICLK
OSPIRENB
OSPID[31:0]
OSPIPRTY
OSPIRVAL
OSPISOP
OSPIEOP
OSPIERR
OSPIRSX
OSPIMOD[1:0]
OSPITENB
OSPITADR[7:0]
OSPITSX
OSPISTPA
OSPIPTPA
ISPISTPA
ISPIPTPA
ISPITADR[7:0]
ISPIRENB
ISPIRVAL
ISPIRSX
Envoy-CE2
Envoy-CE2 Device
DATA SHEET
TXC-06880
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