参数资料
| 型号： | CS61884-IRZ |
| 厂商： | Cirrus Logic Inc |
| 文件页数： | 22/72页 |
| 文件大小： | 0K |
| 描述： | IC LN INTERF T1/E1/J1 160-LFBGA |
| 标准包装： | 126 |
| 功能： | 线路接口单元（LIU） |
| 接口： | E1，J1，T1 |
| 电路数： | 8 |
| 电源电压： | 3.14 V ~ 3.47 V |
| 功率（瓦特）： | 1.73W |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 160-LFBGA |
| 供应商设备封装： | 160-TFGBA（13x13） |
| 包装： | 散装 |
| 包括： | AMI 编码器和解码器，B8ZS 编码器和解码器，HDB3 编码器和解码器，LOS 检测 |
| 产品目录页面： | 759 (CN2011-ZH PDF) |
| 其它名称： | 598-1717 |
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CS61884
DS485F3
29
12. OPERATIONAL SUMMARY
A brief summary of the CS61884 operations in hardware and host mode is provided in Table 7.
12.1 Loopbacks
The CS61884 provides three loopback modes for
each port. Analog Loopback connects the transmit
signal on TTIP and TRING to RTIP and RRING.
Digital Loopback Connects the output of the En-
coder to the input of the Decoder (through the Jitter
Attenuator if enabled). Remote Loopback connects
the output of the Clock and Data Recovery block to
the input of the Pulse Shaper block. (Refer to de-
tailed descriptions below.) In hardware mode, the
LOOP[7:0] pins are used to activate Analog or Re-
mote loopback for each channel. In host mode, the
Analog, Digital and Remote Loopback registers are
used to enable these functions (Refer to the Analog
12.2 Analog Loopback
In
Analog
Loopback,
the
output
of
the
TTIP/TRING driver is internally connected to the
input of the RTIP/RRING receiver so that the data
on TPOS/TNEG and TCLK appears on the
RPOS/RNEG and RCLK outputs. In this mode the
RTIP and RRING inputs are ignored. Refer to
Figure 8 on page 30. In hardware mode, Analog
Loopback is selected by driving LOOP[7:0] high.
In host mode, Analog Loopback is selected for a
given channel using the appropriate bit in the Ana-
NOTE: The simultaneous selection of Analog and
Remote loopback modes is not valid. A TAOS
request overrides the data on TPOS and TNEG
during Analog Loopback. Refer to Figure 9 on
Table 7. Operational Summary
MCLK
TCLK
LOOP
Receive Mode
Transmit Mode
Loopback
Active
Open
RCLK/Data Recovery
Unipolar/Bipolar
Disabled
Active
L
RCLK/Data Recovery
Unipolar/Bipolar
Remote Loopback
Active
H
RCLK/Data Recovery
Unipolar/Bipolar
Analog Loopback
Active
L
X
RCLK/Data Recovery
Power Down
Disabled
Active
H
Open
RCLK/Data Recovery
TAOS
Disabled
Active
H
L
RCLK/Data Recovery
Unipolar/Bipolar
Remote Loopback
Active
H
RCLK/Data Recovery
TAOS
Analog Loopback
L
Active
X
Power Down
Unipolar/Bipolar
Disabled
L
H
X
Power Down
RZ Data
Disabled
L
X
Power Down
Disabled
H
Active
Open
Data Recovery
Unipolar/Bipolar
Disabled
H
Active
L
Data Recovery
RZ Data
Remote Loopback
H
Active
H
Data Recovery
Unipolar/Bipolar
Analog Loopback
H
L
Open
Data Recovery
Power Down
Disabled
H
L
Data Recovery
RZ Data
Remote Loopback
H
L
H
Data Recovery
Power Down
Disabled
H
Open
Data Recovery
RZ Data
Disabled
H
L
Data Recovery
RZ Data
Remote Loopback
H
Data Recovery
RZ Data
Analog Loopback
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