DS2149 查看數據表（PDF） - Maxim Integrated
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DS2149 Datasheet PDF : 32 Pages
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DS2149
Table 9-B. Control and Operation Mode Selection
MODE1
Low
Low
Low
High
High
High
Open
Open
Open
MODE0
Low
High
Open
Low
High
Open
Low
High
Open
HARDWARE SOFTWARE NRZ BIPOLAR AMI B8ZS
On
Off
Off On
Off Off
On
Off
Off On
Off Off
On
Off
On
Off
On Off
Off
On
X
X
XX
Off
On
X
X
XX
Off
On
X
X
XX
On
Off
On
Off
Off On
On
Off
On
Off
Off On
On
Off
On
Off
Off On
OUTPUTS
DISABLED
No
Yes
No
No
Yes
No
No
Yes
No
10. DIAGNOSTIC MODE OPERATION
The DS2149 offers several diagnostic modes as listed in Table 10-A. Various diagnostic modes are only
available in software mode. In hardware mode, the diagnostic modes are selected by a combination of pin
settings. In software mode, the diagnostic modes are selected by setting appropriate bits in the diagnostic
control register.
Table 10-A. Diagnostic Modes
DIAGNOSTIC MODE
AVAILABILITY
HARDWARE SOFTWARE
Local Loopback (LLB)
Yes
Yes
Analog Loopback (ALB)
Yes
Yes
Remote Loopback (RLB)
Yes
Yes
In-Band Network Loopback (NLB)
Yes
Yes
Dual Loopback (DLOOP)
Yes
Yes
Internal Data Pattern Generation and Detection
Transmit AIS (TAIS)
Yes
Yes
Quasirandom Signal Source (QRSS)
Yes
Yes
In-Band Loop-Up/Down Code Generator
No
Yes
Error Insertion and Detection
Bipolar Violation Insertion (INSBPV)
Yes
Yes
Logic Error Insertion (INSLER)
Yes
Yes
Bipolar Violation Detection (BPV)
Yes
Yes
Logic Error Detection, QRSS (QPD)
Yes
Yes
Alarm Condition Monitoring
Receive Carrier Loss (RCL) Monitoring
Yes
Yes
Receive Alarm Indication Signal (AIS) Monitoring
No
Yes
Transmit Driver Failure Monitoring (DFMO)
No
Yes
Jitter Attenuator Limit Trip (JALT)
No
Yes
Other Diagnostic Reports
Receive Line Attenuation Indicator (LATN)
No
Yes
SOFTWARE MODE
MASKABLE
No
No
No
Yes
No
No
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
No
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