參數(shù)資料
型號: XRT83SH38IB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: 8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
中文描述: DATACOM, PCM TRANSCEIVER, PBGA225
封裝: 19 X 19 MM, 1 MM PITCH, PLASTIC, BGA-225
文件頁數(shù): 15/78頁
文件大?。?/td> 606K
代理商: XRT83SH38IB
XRT83SH38
12
REV. 1.0.7
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
JITTER ATTENUATOR
CLOCK SYNTHESIZER
μPCLK/ATAOS
T13
I
Synchronous Microprocessor Clock/Automatic Transmit All Ones
Host Mode
This synchronous input clock is used as the internal master clock to the microproces-
sor interface when configured for in a synchronous mode.
Hardware Mode
This pin is used select an all ones signal to the line interface through TTIP/TRING any
time that a loss of signal occurs. This feature is avaiable in Host mode by program-
ming the appropriate global register.
N
OTE
:
Internally pulled “Low” with a 50k
resistor.
INT
L16
O
Interrupt Output/Turns Ratio Select (External Impedance Mode)
Host Mode
This signal is asserted "Low" when a change in alarm status occurs. Once the status
registers have been read, the interrupt pin will return "High". GIE (Global Interrupt
Enable) must be set "High" in the appropriate global register to enable interrupt gen-
eration.
N
OTES
:
1.
This pin is an open-drain output that requires an external 10K
pull-up
resistor.
2.
Internally pulled “Low” with a 50k
resistor.
S
IGNAL
N
AME
BGA
L
EAD
#
T
YPE
D
ESCRIPTION
JASEL0
JASEL1
A14
B13
I
Jitter Attenuator Select Pins Hardware Mode
JASEL[1:0] pins are used to place the jitter attenuator in the transmit path, the receive
path or to disable it.
N
OTE
:
These pins are internally pulled “Low” with 50k
resistors.
S
IGNAL
N
AME
BGA
L
EAD
#
T
YPE
D
ESCRIPTION
MCLKOUT
H1
O
Synthesized Master Clock Output
This signal is the output of the Master Clock Synthesizer PLL which is at T1 or E1
rate based upon the mode of operation.
S
IGNAL
N
AME
BGA
L
EAD
#
T
YPE
D
ESCRIPTION
Disabled
Transmit
Receive
Receive
JA Path
JA BW Hz
T1
--------
32/32
32/32
64/64
FIFO Size
-----
3
3
3
-----
10
10
1.5
0
0
1
1
JASEL1
0
1
0
1
JASEL0
E1
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