XRT75L00D Datasheet, PDF (17/92 Pages) Exar Corporation – E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

REV. 1.0.2
XRT75L00D
E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
MICROPROCESSOR SERIAL INTERFACE - (HOST MODE)
PIN #
SIGNAL NAME
TYPE
DESCRIPTION
14
RESET
I Register Reset:
Setting this input pin "Low" causes the XRT75L00D to reset the contents of the
Command Registers to their default settings and default operating configuration
NOTE: This pin is internally pulled up.
28
INT/LOSMUT
I/O INTERRUPT Output:
This pin functions as Interrupt Output for Serial Interface. A transition to “Low”
indicates that an interrupt has been generated by the Serial Interface. The inter-
rupt function can be disabled by setting the interrupt enable bit to “0” in the
Channel Control Register.
NOTE: If the XRT75L00D is in Hardware mode, this pin functions as LOSMUT.
12