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參數(shù)資料
型號(hào): IDT82P2521BHG
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 141/147頁(yè)
文件大?。?/td> 0K
描述: IC LIU E1 21+1CH SHORT 640-PBGA
標(biāo)準(zhǔn)包裝: 5
類(lèi)型: 線路接口裝置(LIU)
規(guī)程: E1
電源電壓: 3.135 V ~ 3.465 V
安裝類(lèi)型: 表面貼裝
封裝/外殼: 640-BGA 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 640-PBGA-EP(31x31)
包裝: 托盤(pán)
其它名稱(chēng): 82P2521BHG
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IDT82P2521
21(+1) CHANNEL HIGH-DENSITY E1 LINE INTERFACE UNIT
Programming Information
93
December 7, 2005
RCF0 - Receive Configuration Register 0
Address: 00AH, 04AH, 08AH, 0CAH, 10AH, 14AH, 18AH, 1CAH, (CH1~CH8)
20AH, 24AH, 28AH, 2CAH, 30AH, 34AH, 38AH, 3CAH, (CH9~CH16)
40AH, 44AH, 48AH, 4CAH, 50AH, (CH17~CH21)
7CAH (CH0)
Type: Read / Write
Default Value: 47H
Bit
Name
Description
7
RCKH
This bit determines the output on RCLKn when LLOS is detected. This bit is valid only when LLOS is detected and the AIS and
pattern generation is disabled in the receive path.
0: XCLK. (default)
1: High level.
6
RHZ
This bit determines the output of all receive system interfaced pins (including RDn, RDPn, RDNn, RMFn and RCLKn) when the
corresponding receiver is powered down.
0: Low level.
1: High-Z. (default)
5
R_OFF
This bit determines whether the receiver is powered down.
0: Normal operation. (default)
1: Power down.
4
R120IN
This bit is valid only when the receive line interface is in Receive Differential mode and per-channel internal impedance matching
configuration is enabled. This bit selects the internal impedance matching mode.
0: Partially Internal Impedance Matching mode. An internal programmable resistor (IM) and a value-fixed external resistor (Rr)
are used. (default)
1: Fully Internal Impedance Matching mode. Only an internal programmable resistor (IM) is used.
3
R_SING
This bit determines the receive line interface.
0: Receive Differential line interface. Both RTIPn and RRINGn are used to receive signal from the line side. (default)
1: Receive Single Ended line interface. Only RTIPn is used to receive signal. RRINGn should be left open.
2 - 0
R_TERM[2:0] These bits are valid only when impedance matching is configured on a per-channel basis. These bits select the impedance
matching mode of the receive path to match the cable impedance.
In Receive Differential mode:
010: The 120
internal impedance matching is selected for E1 120 twisted pair cable.
011: The 75
internal impedance matching is selected for E1 75 coaxial cable.
1XX: External impedance matching is selected for E1 120
twisted pair cable and E1 75 coaxial cable.
In Receive Single Ended mode, only External Impedance Matching is supported and the setting of these bits is a don’t-care.
(default)
Others: Reserved.
7654321
0
RCKH
RHZ
R_OFF
R120IN
R_SING
R_TERM2
R_TERM1
R_TERM0
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