參數(shù)資料
型號(hào): XRT75R12DIB
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
中文描述: DATACOM, PCM TRANSCEIVER, PBGA420
封裝: 35 X 35 MM, TBGA-420
文件頁數(shù): 16/131頁
文件大?。?/td> 717K
代理商: XRT75R12DIB
XRT75R12D
REV. P1.0.1
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
PRELIMINARY
11
K25
M22
M23
M24
K26
L26
M26
N26
Addr0
Addr1
Addr2
Addr3
Addr4
Addr5
Addr6
Addr7
I
An eight bit direct address bus that specifies the source/destination
register for a Read or Write operation.
P22
R26
T26
U26
R25
R24
R23
R22
D0
D1
D2
D3
D4
D5
D6
D7
I/O
An eight bit bi-directional data bus that provides the data into the LIU for
a Write operation or the data out to the Host for a Read operation.
P26
INT
O
Interrupt active Output (active low)
Normally, this output pin will be pulled "High". However, if the user
enables interrupts within the LIU, and if those conditions occur, the
XRT75R12D will signal an interrupt from the Microprocessor by pulling
this output pin "Low". The Host Microprocessor must ascertain the
source of the interrupt and service it. Reading the source of the inter-
upt will clear the flag and the INT pin will go back high unless another
interrupt has gone active.
N
OTES
:
1.
This pin will remain "Low" until the Interrupt has been serviced.
2.
This pin must be pulled "High" with a 3k
± 1% resistor.
N2
RESET
I
RESET Input
Pulsing this input "Low" causes the XRT75R12D to reset the contents of
the on-chip Command Registers to their default values. As a conse-
quence, the XRT75R12D will then also be operating in its default condi-
tion.
For normal operation this input pin should be at a logic "High".
N
OTE
:
This input pin is internally pulled high.
MICROPROCESSOR PARALLEL INTERFACE -
P
IN
#
S
IGNAL
N
AME
T
YPE
D
ESCRIPTION
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