參數(shù)資料
型號(hào)： XRT75VL00IV
廠商： Exar Corporation
文件頁(yè)數(shù)： 33/50頁(yè)
文件大?。?/td> 0K
描述： IC LIU E3/DS3/STS-1 1CH 52TQFP
標(biāo)準(zhǔn)包裝： 96
類型： 線路接口裝置（LIU）
驅(qū)動(dòng)器/接收器數(shù)： 1/1
規(guī)程： DS3，E3，STS-1
電源電壓： 3.135 V ~ 3.465 V
安裝類型： 表面貼裝
封裝/外殼： 52-LQFP
供應(yīng)商設(shè)備封裝： 52-TQFP（10x10）
包裝： 托盤
XRT75VL00
37
REV. 1.0.6
E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
7.0
SERIAL HOST INTERFACE:
A flexible serial microprocessor interface is incorporated in the XRT75VL00. The interface is generic and is
designed to support the common microprocessors/microcontrollers. The XRT75VL00 operates in Host mode
when the HOST/HW pin is tied “High”. The serial interface includes a serial clock (SClk), serial data input
(SDI), serial data output (SDO), chip select (CS) and interrupt output (INT). The serial interface timing is shown
in Figure 11.
The active low interrupt output signal (INT pin) indicates alarm conditions like LOS, DMO and FL to the
processor.
When the XRT75VL00 is configured in Host mode, the following input pins,TxLEV, TAOS, RLB, LLB, E3, STS-
1/DS3, REQEN, JATx/Rx, JA0 and JA1 are disabled and must be connected to ground.
Table 14 below illustrates the functions of the shared pins in either Host mode or in Hardware mode.
NOTE: While configured in Host mode, the TxON input pin will be active if the TxON bit in the control register is set to “1”,
and can be used to turn on and off the transmit output drivers. This permits a system designed for redundancy to
quickly switch out a defective line card and switch-in the backup line card.
TABLE 14: FUNCTIONS OF SHARED PINS
PIN NUMBER
IN HOST MODE
IN HARDWARE MODE
24
CS
RxClkINV
26
SClk
TxClkINV
25
SDI
RxON
27
SDO
RxMON
28
INT
LOSMUT
TABLE 15: REGISTER MAP AND BIT NAMES
ADDRESS
(HEX)
PARAMETER
NAME
DATA BITS
7
6
5
4
3
2
1
0
0x00
APS/Redundancy
(read/write)
Reserved Reserved
Reserved
RxON
Reserved Reserved Reserved
TxON
0x01
Interrupt Enable
(read/write)
Reserved
CNT_SATIE
PRBSIE
FLIE
RLOLIE
RLOSIE
DMOIE
0x02
Interrupt Status
(reset on read)
Reserved
CNT_SATIS
PRBSIS
FLIS
RLOLIS
RLOSIS
DMOIS
0x03
Alarm Status
(read only)
Reserved
PRBSLS
DLOS
ALOS
FL
RLOL
RLOS
DMO
0x04
Transmit Control
(read/write)
Reserved
TxMON
INSPRBS Reserved
TAOS
TxClkINV
TxLEV
0x05
Receive Control
(read/write)
Reserved
DLOSDIS
ALOSDIS RxClkINV LOSMUT
RxMON
REQEN
0x06
Block Control
(read/write)
Reserved
PRBSEN
RLB
LLB
E3
STS1/
DS3
SR/DR
0x07
Jitter Attenuator
(read/write)
Reserved
PNTRST
JA1
JATx/Rx
JA0
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