參數(shù)資料
型號(hào)： XRT91L32IQ-F
廠商： EXAR CORP
元件分類： 數(shù)字傳輸電路
英文描述： STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
中文描述： TRANSCEIVER, PQFP100
封裝： 14 X 20 MM, 2.70 MM HEIGHT, PLASTIC, QFP-100
文件頁(yè)數(shù)： 19/37頁(yè)
文件大小： 417K
代理商： XRT91L32IQ-F
xr
REV. 1.0.2
XRT91L32
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
17
2.6
A Frame and Byte Boundary Detection circuit searches the incoming data channel for three consecutive A1
(0xF6 Hex) bytes followed by three consecutive A2 (0x28 Hex) bytes. The detector operates under the control
of the OOF (Out of Frame) signals provided from the SONET Framer. Detection is enabled when OOF is held
"High" and remains active until OOF goes "Low." When framing pattern detection is enabled, the framing
pattern is used to locate byte and frame boundaries in the incoming receive data stream. The receive serial-to-
parallel converter block uses the located byte boundary to assemble the incoming data stream into bytes for
output on the parallel data output bus RXDO[7:0]. The frame boundary is reported on the frame pulse
(FRAMEPULSE) output at the onset of detecting the third A2 byte pattern when any serial 48-bit pattern
matching the framing pattern is detected on the incoming data stream. While in the pattern search and
detection state and so long is OOF is active, the frame pulse (FRAMEPULSE) output is activated for one byte
clock cycle (RXPCLKO = 12.86 ns pulse duration for STS-12/STM-4 or 51.44 ns pulse duration for STS-3/
STM-1) anytime a 48-bit pattern matching the framing pattern is detected on the incoming data stream. Once
the SONET Framer Overhead Circuitry has verified that frame and byte synchronization are correct, the OOF
input pin should be de-asserted by the SONET Framer to disable the XRT91L32 frame search process from
trying to synchronize repeatedly and to de-activate FRAMEPULSE. When the XRT91L32’s framing pattern
detection is disabled upon the de-assertion of OOF input pin from the SONET Framer, the byte boundary will
lock to the detected location and will remain locked to that location found when detection was previously
enabled.
SONET Frame Boundary Detection and Byte Alignment Recovery
2.7
During STS-12/STM-4 operation, the SIPO is used to convert the 622.08 Mbps serial data input to 77.76 Mbps
parallel data output which can interface to a SONET Framer/ASIC. If the XRT91L32 is operating in STS-3/
STM-1, the SIPO will convert the 155.52 Mbps serial data input to 19.44 Mbps parallel data output. The SIPO
bit de-interleaves the serial data input into an 8-bit parallel output to RXDO[7:0]. A simplified block diagram is
shown in Figure 8. XRT91L32 clocks data out on RXDO[7:0] at the falling edge of RXPCLKO.
Receive Serial Input to Parallel Output (SIPO)
F
IGURE
8. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
SIPO
b
0
0
b
0
1
b
0
2
b
0
3
b
n
0
b
n
1
b
n
2
b
n
3
b
n+
0
b
n+
1
b
n+
2
b
n+
3
b
7
0
b
7
1
b
7
2
b
7
3
8-bit Parallel LVTTL Output Data
RXDO0
RXDO7
RXDO
n+
RXDOn
RXIP/N
RXPCLKO
b
3
0 b
2
0 b
1
0 b
0
0
b
7
0 b
6
0 b
5
0 b
4
0
b
3
3 b
2
3 b
1
3
b
4
3
b
5
3
b
6
3
b
7
3
S
77.76 MHz (STS-12/STM-4) or 19.44 MHz (STS-3/STM-1)
622.08 Mbps STS-12/STM-4 or
155.52 Mbps STS-3/STM-1 serial data rate
相關(guān)PDF資料
PDF描述
XRT91L80 2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER
XRT91L80_0507 2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER
XRT91L80IB 2.488/2.666 GBPS STS-48/STM-16 SONET/SDH TRANSCEIVER
XRT91L81 2.488/2.666GBPS OC-48/STM-16 SONET/SDH TRANSCEIVER
XRT91L81IB 2.488/2.666GBPS OC-48/STM-16 SONET/SDH TRANSCEIVER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT91L32IQTR 功能描述:LIN 收發(fā)器 PHY Transceiver RoHS:否 制造商:NXP Semiconductors 工作電源電壓: 電源電流: 最大工作溫度: 封裝 / 箱體:SO-8
XRT91L32IQTR-F 功能描述:LIN 收發(fā)器 PHY Transceiver RoHS:否 制造商:NXP Semiconductors 工作電源電壓: 電源電流: 最大工作溫度: 封裝 / 箱體:SO-8
XRT91L33 制造商:EXAR 制造商全稱:EXAR 功能描述:STS-12/STS-3 MULTIRATE CLOCK AND DATA RECOVERY UNIT
XRT91L33AIG-F 制造商:Exar Corporation 功能描述:CDR 155.52Mbps/622.08Mbps SONET/SDH 20-Pin TSSOP
XRT91L33ES 功能描述:界面開發(fā)工具 Eval System for XRT91L33 Series RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V
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