DS21FT42 Maxim Integrated Products, DS21FT42 Datasheet - Page 45

• Manufacturer Part Number: DS21FT42
• Description: IC FRAMER T1 4X3 12CH 300-BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21FT42

• Controller Type: T1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 225mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 300-BGA
• 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
LUP
RBL
RCL
LDN
POSITION
SR1.7
SR1.6
SR1.5
SR1.4
SR1.3
SR1.2
SR1.1
SR1.0
LOTC
NAME AND DESCRIPTION
Loop Up Code Detected. Set when the loop up code as
defined in the RUPCD register is being received. See
Section 20 for details.
Loop Down Code Detected. Set when the loop down code
as defined in the RDNCD register is being received. See
Section 20 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.
RSLIP
45 of 114
RBL
RYEL
RCL
(LSB)
RLOS