TXC-06880BIOG Transwitch Corporation, TXC-06880BIOG Datasheet - Page 87

• 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

200C
2010
2014
2018
201C
2040
PRELIMINARY TXC-06880-MB, Ed. 4
February 2005
(hex)
Addr
RW
RO
RW
RO
RW
RO
RW
RO
RO
RC
RO
Mode
7-0
31-8
7-0
31-8
7-0
31-8
0
31-1
31-0
0
1
2
3
31-4
range
Bit
value after
00000000
00000000
00000000
1
0
0
0
0
0
0
Default
reset
- Memory Maps and Bit Descriptions -
SPI-3 Input STPA High Threshold: Input SPI-3 near full high threshold
for de-assertion of STPA. The high threshold is the fullness level and
when reached by the Egress FIFO will de-assert STPA. The value is
specified in terms of the SPI-3 bus width. For a bus width of 8 bits, the
value is based on bytes. For a bus width of 16 bits, 2 bytes and a bus
width of 32 bits, 4 bytes. Minimum value is 2.
Reserved
SPI-3 Input PTPA Low Threshold: Input SPI-3 near full low threshold
for assertion of PTPA. Once the PTPA is de-asserted because the
Egress FIFO reached the SPI-3 high threshold (SIPHT), PTPA will be
asserted when the Egress FIFO reaches the PTPA low threshold. This
allows for a hysteresis in the PTPA signal. The threshold is in words (8
bytes). Programmable values are 1 to 255 which corresponds to
threshold values of 8 to 2040, in 8 byte increments.
Reserved
SPI-3 Input PTPA High Threshold: Input SPI-3 near full high threshold
for de-assertion of PTPA. The high threshold is the fullness level in
words (8 bytes), when reached by the Egress FIFO will de-assert PTPA.
Programmable values are 1 to 255 which corresponds to threshold
values of 8 to 2040, in 8 byte increments. The PTPA High Threshold
should be set to at least 3 times the chunk size being used in the
attached device (associated with ISPI flow).
Reserved
Reserved
Must be set to 0 for normal operation.
Reserved
Reserved
SPI-3 Input Overflow Discard Status: Status bit indicating overflow
due to the Link layer device ignoring the Packet available signals
(STPA). Occurs when the SPI-3 Input interface is in PHY mode and
SPI-3 Input STPA Enable = 1. Clear on Read.
SPI-3 Input Parity Error Status: Status bit indicating occurrence of
Parity error across the SPI-3 Input Interface bus. Clear on Read.
SPI-3 Input Packet Error Status: Status bit indicating occurrence of
Packet error across the SPI-3 Input Interface indicated by the Error
signal. Clear on Read.
SPI-3 Input Start of Packet Error Status: Status bit indicating
occurrence of Start of Packet error across the SPI-3 Input Interface.
Clear on Read.
Reserved
Description
Envoy-CE2 Device
DATA SHEET
TXC-06880
87 o f 12 2