xrt75r12 Exar Corporation, xrt75r12 Datasheet - Page 66

• Manufacturer Part Number: xrt75r12
• Description: Twelve Channel E3/ds3/sts-1 Line Interface Unit With Jitter
• Manufacturer: Exar Corporation

XRT75R12
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
Reserved Reserved
N
B
B
UMBER
7, 6
IT
B
IT
5
4
3
2
1
0
B
IT
7 - 0
R/O
N
7
IT
0
UMBER
T
7
ABLE
Channel 10 Interrupt Status
Channel 11 Interrupt Status
Channel 9 Interrupt Status
Channel 8 Interrupt Status
Channel 7 Interrupt Status
Channel 6 Interrupt Status
B
IT
T
26: C
Part Number ID
6
ABLE
B
R/O
Reserved
IT
HANNEL
Interrupt Status
1
N
Value
N
27: D
AME
6
Channel 11
AME
B
R/O
IT
EVICE
L
5
EVEL
B
/P
R/O
IT
1
ART
I
Interrupt Status
NTERRUPT
5
T
R/O
Channel 10
YPE
N
T
R/O
B
YPE
R/O
UMBER
IT
4
Part Number ID Value
Channel n Interrupt Status Bit:
This READ-ONLY bit-field indicates whether the XRT75R12 has a
pending Channel n-related interrupt that is awaiting service. The last
six channels are serviced through this location and the other six at
address 0x61. These two registers are used by the Host to identify the
source channel of an active interrupt.
0 - Indicates that there is NO Channel n-related Interrupt awaiting ser-
vice.
1 - Indicates that there is at least one Channel n-related Interrupt await-
ing 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 n
(Address Locations = 0xn2) to determine the exact source of the inter-
rupt request.
N
B
S
D
R/O
V
OTE
IT
TATUS
EFAULT
R
1
0x78
ALUE
EGISTER
4
Interrupt Status
: Once this bit-field is set to "1", it will not be cleared back to "0"
Channel 9
until the user has read out the contents of the Source-Level
Interrupt Status Register bit, that corresponds to the interrupt
request channel.
63
R
B
R/O
Part Number ID Value:
This READ-ONLY register contains a unique value for the
XRT75R12. This value will always be 0x78.
EGISTER
IT
- CR110 (A
3
B
R/O
IT
1
3
- CR225 (A
Interrupt Status
Channel 8
DDRESS
B
R/O
IT
D
B
2
ESCRIPTION
R/O
IT
0
DDRESS
D
2
L
ESCRIPTION
OCATION
Interrupt Status
Channel 7
L
OCATION
B
R/O
IT
B
R/O
= 0
IT
1
0
1
X
6E)
= 0
Interrupt Status
X
Channel 6
E1)
B
REV. 1.0.4
R/O
B
R/O
IT
IT
0
0
0