DS21354LN+ Maxim Integrated Products, DS21354LN+ Datasheet - Page 109

• Manufacturer Part Number: DS21354LN+
• Description: IC TXRX E1 1-CHIP 3.3V 100-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21354LN+

• Function: Single-Chip Transceiver
• Interface: E1, HDLC
• Number Of Circuits: 1
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Includes: Remote and AIS Alarm Detector / Generator
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -

Figure 18-14. DS21354/DS21554 Framer Synchronization Flowchart
RCR1.1 = 0
RLOS = 1
Resync if
Increment CRC4
Sync Counter;
CRC4SA = 0
CRC4 Resync
CAS Resync
Criteria Met;
Set CASRC
Criteria Met
(RIR.2)
Set FASRC
(RIR.0)
(RIR.1)
CRC4 Word Errors
FAS Resync
Criteria Met
Time
Check for >=915
8ms
Out
Out of 1000
Check for CAS
MF Word Error
109 of 124
CRC4 Multiframe Search
(if enabled via CCR1.0)
CRC4 Sync Criteria
Met; CRC4SA = 0;
(depends on RCR1.2)
Sync Counter
Reset CRC4
CRC4SA = 1
Check for FAS
Framing Error
If CRC4 is on
(CCR1.0 = 1)
(CCR1.3 = 0)
If CAS is on
Sync Declared
FAS Search
FASSA = 1
Criteria Met
FASSA = 0
RLOS = 1
RLOS = 0
Power Up
FAS Sync
CAS Multiframe Search
(if enabled via CCR1.3)
Criteria Met
CASSA = 0
CAS Sync
CASSA = 1