DS21Q42T Maxim Integrated Products, DS21Q42T Datasheet - Page 41

• Manufacturer Part Number: DS21Q42T
• Description: IC FRAMER ENHANCED T1 4X 128TQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q42T

• Controller Type: T1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

SR1: STATUS REGISTER 1 (Address=20 Hex)
(MSB)
LUP
SYMBOL
RSLIP
LOTC
RYEL
RLOS
LDN
RBL
RCL
LUP
LDN
POSITION
LOTC
SR1.7
SR1.6
SR1.5
SR1.4
SR1.3
SR1.2
SR1.1
SR1.0
RSLIP
NAME AND DESCRIPTION
Loop Up Code Detected. Set when the loop up code as
defined in the RUPCD register is being received. See Section
16 for details.
Loop Down Code Detected. Set when the loop down code as
defined in the RDNCD register is being received. See Section
16 for details.
Loss of Transmit Clock. Set when the TCLK pin has not
transitioned for one channel time (or 5.2 us). Will force the
RLOS/LOTC pin high if enabled via CCR3.5. Also will force
transmit side formatter to switch to RCLK if so enabled via
TCR1.7.
Receive Elastic Store Slip Occurrence. Set when the
receive elastic store has either repeated or deleted a frame.
Receive Blue Alarm. Set when an unframed all one’s code is
received at RPOS and RNEG.
Receive Yellow Alarm. Set when a yellow alarm is received
at RPOS and RNEG.
Receive Carrier Loss. Set when a red alarm is received at
RPOS and RNEG.
Receive Loss of Sync. Set when the device is not
synchronized to the receive T1 stream.
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RBL
RYEL
RCL
(LSB)
RLOS