tdat04622 ETC-unknow, tdat04622 Datasheet - Page 67

• 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.
Pin Information
Table 5
* I
AM21
AR21
AK32
u
AJ31
AN9
U32
AP8
V32
Pin
= I
d
= 50 kΩ, where I
.
Pin Descriptions—Enhanced UTOPIA Interface Signals (continued)
RxEOP[D]
RxEOP[C]
RxERR[D]
RxERR[C]
RxEOP[B]
RxEOP[A]
RxERR[B]
RxERR[A]
Symbol
u
= internal pull-up resistance and I
(continued)
3.3 V
3.3 V
Type
I/O*
O
O
Receive End of Packet. These pins are used only in U2+ and
U3+ (packet) modes. This signal indicates that the last word of a
packet is on the RxDATA[D:A][15:0] bus. RxEOP[D:A] is valid only
when RxENB[D:A] is asserted, and is updated on the rising edge
of RxCLK[D:A].
In U3+ (32-bit mode), only the RxEOP[A] output pin of port A is
used to indicate the end of the outgoing packet.
Receive Error. These pins are used only in U2+ and U3+
(packet) modes. RxERR[D:A] is only used in POS mode, and indi-
cates that the current packet is to be aborted and discarded, if
possible. RxERR[D:A] is only valid when RxEOP[D:A] and
RxENB[D:A] are asserted, and is updated on the rising edge of
RxCLK[D:A].
If the Rx FIFO overflows, RxERR[D:A] and RxEOP[D:A] are
asserted to indicate a corrupted packet.
RxERR is asserted when a CRC error occurs in any packet mode
using CRC-16 or CRC-32. RxERR is asserted when an incoming
packet has an abort flag at the end of its stream. In both of these
cases, an RxEOP is asserted with the RxERR.
RxERR is not asserted when a header does not match in PPP
header attaching mode. In that case, no data is sent to the UTO-
PIA interface.
In U3+ (32-bit mode), only the RxERR[A] output pin of port A is
used to indicate an error on the outgoing packet.
d
= internal pull-down resistance.
Name/Description
155/622/2488 Mbits/s Data Interface
TDAT042G5 SONET/SDH
39