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參數(shù)資料
| 型號(hào)： | S3038 |
| 廠商： | Applied Micro Circuits Corp. |
| 英文描述： | SONET/SDH/ATM OC-12 Quad Transceiver(SONET/SDH四收發(fā)器（完全集成OC-12接口器件）) |
| 中文描述： | 的SONET / SDH / ATM的的OC - 12四路收發(fā)器（SONET / SDH的四收發(fā)器（完全集成的OC - 12接口器件）） |
| 文件頁數(shù)： | 27/29頁 |
| 文件大?。?/td> | 1467K |
| 代理商： | S3038 |
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S3038
SONET/SDH/ATM OC-12 QUAD TRANSCEIVER
May 31, 2001 / Revision C
RECEIVER FRAMING
Figure 17 shows a typical reframe sequence in
which a byte realignment is made. The frame and
byte boundary detection is enabled by the rising
edge of OOF and remains enabled while OOF is
high. Both boundaries are recognized upon receipt
of the third A2 byte which is the first data byte to be
reported with the correct byte alignment on the out-
going data bus (POUTx[7:0]). Concurrently, the
frame pulse is set high for one POCLK cycle.
When interfacing with a section terminating device,
the OOF input remains high for one full frame after
the first frame pulse while the section terminating
device verifies internally that the frame and byte
alignment are correct, as shown in Figure 17. Since
at least one framing pattern has been detected since
the rising edge of OOF, boundary detection is dis-
abled when OOF is set low.
The frame and byte boundary detection block is acti-
vated by the rising edge of OOF, and stays active
until the first FP pulse or until OOF goes low, which-
ever occurs last. Figure 18 shows a typical OOF
timing pattern which occurs when the S3038 is con-
nected to a down stream section terminating device.
OOF remains high for one full frame after the first FP
pulse. The frame and byte boundary detection block
is active until OOF goes low.
Figure 19 shows the frame and byte boundary detec-
tion activation by a rising edge of OOF, and
deactivated by the first FP pulse.
Figure 17. Frame and Byte Detection
NOTE 1: Range of input to output delay can be 1.5 to 2.5 POCLK cycles.
Figure 18. OOF Operation Timing with PM5312
STTX or PM5355 SUNI-622
BOUNDARY DETECTION ENABLED
OOF
FP
OOF
FP
BOUNDARY DETECTION ENABLED
Figure 19. Alternate OOF Timing
A1
A1
A1
A2
A2
A2
A2
A2
Note 1
A1
A1
A1
A2
A2
A2 (28H)
Invalid Data
Valid
Data
RECOVERED
CLOCK/
REFCLK
OOF
RSD
POUTx[7:0]
POCLK
FP
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