tdat04622 ETC-unknow, tdat04622 Datasheet - Page 189

• Manufacturer Part Number: tdat04622
• Description: Tdat Sonet/sdh 155/622/2488 Mbits/s Data Interfaces
• Manufacturer: ETC-unknow

Data Sheet
May 2001
Agere Systems Inc.
Register Descriptions
UT Registers
UT Provisioning Registers (R/W) (continued)
Table 63. Registers 0x0211, 0x0215, 0x0219, 0x021D: Channel [A—D] Ingress Provisioning Register (R/W)
Reset default of registers = 0x361F.
Table 64. Registers 0x0212, 0x0216, 0x021A, 0x021E: Channel [A—D] Egress Provisioning Register (R/W)
Reset default of registers = 0x361F.
0211, 0215,
0212, 0216,
0219, 021D
021A, 021E
Address
Address
(Hex)
(Hex)
15—14
15—14
13—8
13—8 EGRESS_WATERMARK_
Bit #
7—6
5—0
Bit #
7—6
5—0
(continued)
EGRESS_WATERMARK_
INGRESS_WATERMARK
INGRESS_WATERMARK
_HIGH_[A—D][6:0]
_LOW_[A—D][6:0]
HIGH_[A—D][6:0]
LOW_[A—D][6:0]
(continued)
Name
Name
—
—
—
—
Reserved. These bits must be written to their
reset default value (00).
Ingress Watermark High for Channel
[A—D]. Defines threshold before which over-
flow is detected causing a head of FIFO dis-
card; data in the receive FIFO will be discarded
down to the next start of packet/cell.
Reserved. These bits must be written to their
reset default value (00).
Ingress Watermark Low for Channel [A—D].
Defines how many words must be stored in the
ingress FIFO before transmission out of the
UTOPIA port, if an end of packet is not
received.
Reserved. These bits must be written to their
reset default value (00).
Egress Watermark High for Channel [A—D].
Defines how many words can be stored into the
egress FIFO before backpressure is applied to
the UTOPIA PHY Tx port to stop acceptance of
more traffic. Default value is set for packet
transfer. For ATM transfer, the value should be
configured as 0x29. For packet mode, this value
depends upon the specific user-interface char-
acteristics. The default value (110110) will work
for packet mode.
Reserved. These bits must be written to their
reset default value (00).
Egress Watermark Low for Channel [A—D].
Defines how many words must be stored in the
egress FIFO before transmission to the data
engine, if an end of packet is not received.
Function
Function
155/622/2488 Mbits/s Data Interface
TDAT042G5 SONET/SDH
Default
Default
110110
011111
110110
011111
Reset
Reset
00
00
00
00
161