XRT75R03D Datasheet, PDF (68/134 Pages) Exar Corporation – THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER

XRT75R03D
REV. 1.0.2 THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER
BIT NUMBER NAME
1
Channel
1 Inter-
rupt
Status
0
Channel
0 Inter-
rupt
Status
TYPE
R/W
R/W
DEFAULT
VALUE
DESCRIPTION
0
Channel 1 Interrupt Enable Bit:
This READ-ONLY bit-field indicates whether or not the XRT75R03D
has a pending Channel 1-related interrupt that is awaiting service.
0 - Indicates that there is NO Channel 1-related Interrupt awaiting
service.
1 - Indicates that there is at least one Channel 1-related Interrupt
awaiting service. In this case, the user’s Interrupt Service routine
should be written such that the Microprocessor will now proceed to
read out the contents of the Source Level Interrupt Status Register -
Channel 1 (Address Location = 0x0A) in order to determine the
exact cause of the interrupt request.
NOTE: Once this bit-field is set to "1", it will not be cleared back to
"0" until the user has read out the contents of the Source-
Level Interrupt Status Register bit, that corresponds with
the interrupt request.
0
Channel 0 Interrupt Enable Bit:
This READ-ONLY bit-field indicates whether or not the XRT75R03D
has a pending Channel 0-related interrupt that is awaiting service.
0 - Indicates that there is NO Channel 0-related Interrupt awaiting
service.
1 - Indicates that there is at least one Channel 0-related Interrupt
awaiting service. In this case, the user’s Interrupt Service routine
should be written such that the Microprocessor will now proceed to
read out the contents of the Source Level Interrupt Status Register -
Channel 0 (Address Location = 0x02) in order to determine the
exact cause of the interrupt request.
NOTE: Once this bit-field is set to "1", it will not be cleared back to
"0" until the user has read out the contents of the Source-
Level Interrupt Status Register bit, that corresponds with
the interrupt request.
BIT 7
R/O
0
TABLE 21: DEVICE/PART NUMBER REGISTER - CR62 (ADDRESS LOCATION = 0X3E)
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
Part Number ID Value
R/O
R/O
R/O
R/O
R/O
R/O
1
1
1
0
0
1
BIT 0
R/O
1
BIT NUMBER
NAME
7-0
Part Number ID
Value
TYPE
R/O
DEFAULT
VALUE
DESCRIPTION
0x73
Part Number ID Value:
This READ-ONLY register contains a unique value that
represents the XRT75R03D. In the case of the
XRT75R03D, this value will always be 0x73.
63