IDT82V2048 Integrated Device Technology, Inc., IDT82V2048 Datasheet - Page 16

• Manufacturer Part Number: IDT82V2048
• Manufacturer: Integrated Device Technology, Inc.

register GCF is 0 or output all ones as AIS (alarm indication signal) when
bit AISE is set to 1; The RCLKn is replaced by MCLK only if the AISE is
set.
Alarm Indication Signal Detection (AIS)
recovery, as Table-5 shows.
Error Detection
HDB3 code violations, refer to figure-7, 8, 9. All the three kinds of errors
TABLE - 5. AIS CONDITION
TABLE - 6. ERROR DETECTION
IDT82V2048 OCTAL T1/E1 SHORT HAUL LINE INTERFACE UNIT
detected
cleared
Line Code
/B8ZS
Alarm Indication Signal is available only in host mode with clock
The device can detects excessive zero, bipolar violations and B8ZS/
HDB3
AIS
AIS
AMI
Hardware Mode
Less than 3 zeros contained in each of two
3 or more zeros contained in each of two
+ Excessive Zero
consecutive 512-bit stream are received
consecutive 512-bit stream are received
Pin CVn Reports
+ Code Violation
Bipolar Violation
Bipolar Violation
RRING
RTIP
(register LAC defaulted to 0)
CLK
RD
CV
ITU G.775 for E1
1
Line Code
/B8ZS
HDB3
AMI
2
CODVn in e-CODV CZERn in e-CZER
3
Figure - 7. AMI Bipolar Violation
1
0
0
1
1
-
Bipolar violation
4
Less than 3 zeros contained in
3 or more zeros contained in a
a 512-bit stream are received
512-bit stream are received
2
ETSI 300233 for E1
(register LAC is 1)
5
16
are reported in both host mode and hardware mode with HDB3/B8ZS
line code rule is used. Moreover, in host mode, the expanded registers
e-CZER and e-CODV are used to determine whether the excessive zero
and code violation are reported respectively. When configured in AMI de-
coding mode, only bipolar violation can be reported.
pin RDNn/CVn is used as error report output (CVn pin).
rized in Table-6.
The error detection is available only in single rail mode where the
The configuration and report status of error detection are summa-
0
1
0
1
-
3
Host Mode
V
4
Bipolar Violation + Code Violation + Excessive Zero
Bipolar Violation detected
6
(a ones density of 99.9% over a period of 5.3ms)
Less than 9 zeros contained in a 8192-bit stream
5
9 or more zeros contained in a 8192-bit stream
INDUSTRIAL TEMPERATURE RANGES
Bipolar Violation + Excessive Zero
Bipolar Violation + Code Violation
7
ANSI T1.231 for T1
Pin CVn Reports
V
Bipolar Violation
Bipolar Violation
are received
are received
6