參數(shù)資料
型號(hào)： IBM42M10SNYAA20
廠商： IBM Microeletronics
英文描述： 1063 MB/S Gigabit Link Module(1063 MB/S 吉位連接模塊（高性能集成光纖收發(fā)器）)
中文描述： 1063 MB / s的千兆連接模塊（1063 MB /秒吉位連接模塊（高性能集成光纖收發(fā)器））
文件頁(yè)數(shù)： 11/26頁(yè)
文件大?。?/td> 436K
代理商： IBM42M10SNYAA20
IBM42M10SNYAA20
IBM42M10LNYAA10
1063Mb/s Gigabit Link Module - No OFC
GLM1063N.02
11/10/99
IBM Corporation. All rights reserved.
Use is further subject to the provisions at the end of this document.
Page 11 of 26
Link Acquisition Sequence
The following sequence should be followed to get a GLM in full synchronization with a companion card under-
going a similar sequence. This sequence will also work with a single card when using an optical wrap connec-
tor.
1. Power up the GLM. The Transmit Byte Clock should be running as defined in Transmit Byte Clock (TBC)
on page 8.
2. The Link Unusable line will indicate if the receiver is detecting an adequate incoming light level.
3. Drive the Transmit Data lines to a 01010101010101010101. (This speeds up the synchronization process
and assures that the Comma Detect line will not pulse randomly on the companion card during the
remainder of this sequence.)
4. Drive the input control lines as follows:
a. Enable Wrap: low (will not be changed)
b. Enable Comma Detect: high (will not be changed)
c. Lock to Reference: high
If a link is properly connected and the companion card is in an equivalent state of readiness, the Link
Unusable line will be low. This indicates that the received light is sufficient for operation.
5. Bring Lock to Reference low for at least 500
ν
s. See Lock to Reference (Lck_Ref) on page 8.
6. Bring the Lock to Reference high.
After 2500 bit times (2.4
ν
s), the GLM should be in bit synchronization (the internal clocks are aligned to
the incoming bit stream), but not yet byte synchronization (the byte is aligned along the same boundary it
had when sent from the companion system to the companion GLM prior to serialization). The Receive
Byte Clock frequency should now be running at 53.125MHz (the frequency of the companion Transmit
Byte Clock) and the Comma Detect line is ready to indicate reception of the Comma Character.
7. Drive the Transmit Data lines with a K28.5 (Byte Sync) character.
As soon as the GLM receives the K28.5 character from the other side of the link, the clocks will align to the
byte boundary and all the Receive Data lines will have valid data. This will be indicated by the activation of the
Comma Detect line (see Receive Section on page 4).
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