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參數(shù)資料
| 型號(hào)： | CS61884-IRZ |
| 廠商： | Cirrus Logic Inc |
| 文件頁(yè)數(shù)： | 18/72頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC LN INTERF T1/E1/J1 160-LFBGA |
| 標(biāo)準(zhǔn)包裝： | 126 |
| 功能： | 線路接口單元（LIU） |
| 接口： | E1，J1，T1 |
| 電路數(shù)： | 8 |
| 電源電壓： | 3.14 V ~ 3.47 V |
| 功率（瓦特）： | 1.73W |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 160-LFBGA |
| 供應(yīng)商設(shè)備封裝： | 160-TFGBA（13x13） |
| 包裝： | 散裝 |
| 包括： | AMI 編碼器和解碼器，B8ZS 編碼器和解碼器，HDB3 編碼器和解碼器，LOS 檢測(cè) |
| 產(chǎn)品目錄頁(yè)面： | 759 (CN2011-ZH PDF) |
| 其它名稱： | 598-1717 |
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CS61884
DS485F3
25
The CS61884 also allows the user to customize the
transmit pulse shapes to compensate for non-stan-
dard cables, transformers, or protection circuitry.
For further information on the AWG Refer to Ar-
For more information on the host mode registers,
refer to Register Descriptions (See Section 14 on
9.1 Bipolar Mode
Bipolar mode provides transparent operation for
applications in which the line coding function is
performed by an external framing device. In this
mode, the falling edge of TCLK samples NRZ data
on TPOS/TNEG for transmission on TTIP/TRING.
9.2 Unipolar Mode
In unipolar mode, the CS61884 is configured such
that transmit data is encoded using B8ZS, HDB3,
or AMI line codes. This mode is activated by hold-
ing TNEG/UBS “High” for more than 16 TCLK
cycles. Transmit data is input to the part via the
TPOS/TDATA pin on the falling edge of TCLK.
When operating the part in hardware mode, the
CODEN pin is used to select between B8ZS/HDB3
or AMI encoding. During host mode operation, the
line coding is selected via the Global Control Reg-
NOTE: The encoders/decoders are selected for all
eight channels in both hardware and host
mode.
9.3 RZ Mode
In RZ mode, the internal pulse shape circuitry is
bypassed and RZ data driven into TPOS/TNEG is
transmitted on TTIP/TRING. In this mode, the
pulse width of the transmitter output is determined
by
the
width
of
the
RZ
signal
input
to
TPOS/TNEG. This mode is entered when MCLK
does not exist and TCLK is held “High” for at least
12
μsec.
9.4 Transmitter Powerdown / High-Z
The transmitters can be forced into a high imped-
ance, low power state by holding TCLK of the ap-
propriate channel low for at least 12
μs or 140
MCLK cycles. In hardware and host mode, the
TXOE pin forces all eight transmitters into a high
impedance state within 1
μs.
In host mode, each transmitter is individually con-
trollable using the Output Disable Register (12h)
(See Section 14.19 on page 39). The TXOE pin can
be used in host mode, but does not effect the con-
tents of the Output Enable Register. This feature is
useful in applications that require redundancy.
9.5 Transmit All Ones (TAOS)
When TAOS is activated, continuous ones are
transmitted on TTIP/TRING using MCLK as the
transmit timing reference. In this mode, the TPOS
and TNEG inputs are ignored.
In hardware mode, TAOS is activated by pulling
TCLK “High” for more than 16 MCLK cycles.
Table 5. Hardware Mode Line Length Configuration Selection
LEN[2:0]
Transmit Pulse Configuration
Line Z
Operation
000
E1 3.0V / E1 2.37V
120
Ω / 75Ω
E1
001
DS1, Option A (undershoot)
100
Ω
T1/J1
010
DS1, Option A (0 dB)
100
Ω
T1/J1
011
DSX-1: 0-133 ft. (0.6dB)
100
Ω
T1/J1
100
DSX-1: 133-266 ft. (1.2dB)
100
Ω
T1/J1
101
DSX-1: 266-399 ft. (1.8dB)
100
Ω
T1/J1
110
DSX-1: 399-533 ft. (2.4dB)
100
Ω
T1/J1
111
DSX-1: 533-655 ft. (3.0dB)
100
Ω
T1/J1
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