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XRT7250 Scheda tecnica(PDF) 350 Page - Exar Corporation

Il numero della parte XRT7250
Spiegazioni elettronici  DS3/E3 FRAMER IC
PDF  463 Pages
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Produttore elettronici  EXAR [Exar Corporation]
Homepage  http://www.exar.com
Logo EXAR - Exar Corporation

XRT7250 Scheda tecnica(HTML) 350 Page - Exar Corporation

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XRT7250
DS3/E3 FRAMER IC
REV. 1.1.1
331
Writing a “1” into this bit-field enables the Receive
LAPD Message Interrupt. Conversely, writing a “0”
into this bit-field disables the Receive LAPD Message
Interrupt.
Servicing the Receive LAPD Message Interrupt
Whenever the XRT7250 Framer IC generates this in-
terrupt, it will do the following.
• It will assert the Interrupt Request output pin (INT),
by driving it “Low”.
• It will set Bit 0 (RxLAPD Interrupt Status), within the
Rx E3 LAPD Control register to “1”, as indicated
below.
• It will write the contents of the newly Received
LAPD Message into the Receive LAPD Message
buffer (located at 0xDE through 0x135).
Whenever the Terminal Equipment encounters the
Receive LAPD Message Interrupt, then it should read
out the contents of the Receive LAPD Message buff-
er, and respond accordingly.
RXE3 LAPD CONTROL REGISTER (ADDRESS = 0X18)
BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0
Not Used
RxLAPD
Enable
RxLAPD
Interrupt Enable
RxLAPD
Interrupt Enable
RO
RO
RO
RO
RO
R/W
R/W
RUR
00000
0
0
0



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