DS21Q43AT Maxim Integrated Products, DS21Q43AT Datasheet - Page 20

• Manufacturer Part Number: DS21Q43AT
• Description: IC FRAMER E1 QUAD 5V IND 128TQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q43AT

• Controller Type: E1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 32mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Dc: 0319
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

CCR2: COMMON CONTROL REGISTER 2 (Address=1A Hex)
AUTOMATIC ALARM GENERATION
When either CCR2.4 or CCR2.5 is set to 1, the DS21Q43A monitors the receive side to determine if any
of the following conditions are present: loss of receive frame synchronization, AIS alarm (all 1s) re-
ception, or loss of receive carrier (or signal). If any one (or more) of the above conditions is present, then
the DS21Q43A will either force an AIS alarm (if CCR2.5=1) or a Remote Alarm (CCR2.4=1) to be
transmitted via the TPOS and TNEG pins. It is an illegal state to have both CCR2.4 and CCR2.5 set to 1
at the same time.
(MSB)
ECUS
SYMBOL
LOTCMC
VCRFS
RSERC
ECUS
AAIS
ARA
-
-
VCRFS
POSITION
CCR2.7
CCR2.6
CCR2.5
CCR2.4
CCR2.3
CCR2.2
CCR2.1
CCR2.0
AAIS
NAME AND DESCRIPTION
Error Counter Update Select.
0=update error counters once a second
1=update error counters every 62.5 ms (500 frames)
VCR Function Select.
0=count BiPolar Violations (BPVs)
1=count Code Violations (CVs)
Automatic AIS Generation.
0=disabled
1=enabled
Automatic Remote Alarm Generation.
0=disabled
1=enabled
RSER Control.
0=allow RSER to output data as received under all conditions
1=force RSER to 1 under loss of frame alignment conditions
Loss of Transmit Clock Mux Control. Determines whether the
transmit side formatter should switch to the ever-present RCLK
if the TCLK should fail to transition (see Figure 1-1).
0=do not switch to RCLK if TCLK stops
1=switch to RCLK if TCLK stops
Not Assigned. Should be set to 0 when written.
Not Assigned. Should be set to 0 when written.
ARA
20 of 60
RSERC
LOTCMC
-
DS21Q43A
(LSB)
-