XRT75R03D_06 Datasheet, PDF (68/135 Pages) Exar Corporation – EXAR DATA SHEET FORMAT TEMPLATES

XRT75R03D
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER
REV. 1.0.4
BIT NUMBER NAME
1
Channel 1
Interrupt
Status
TYPE
R/W
0
Channel 0
R/W
Interrupt
Status
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
0
1
0
0
1
BIT 0
R/O
1
BIT NUMBER
NAME
7-0
Part Number ID
Value
TYPE
R/O
DEFAULT
VALUE
DESCRIPTION
0x53
Part Number ID Value:
This READ-ONLY register contains a unique value that rep-
resents the XRT75R03D. In the case of the XRT75R03D,
this value will always be 0x53.
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