DS2149 MAXIM [Maxim Integrated Products], DS2149 Datasheet - Page 13

• Manufacturer Part Number: DS2149
• Description: 5V T1/J1 Line Interface Unit
• Manufacturer: MAXIM [Maxim Integrated Products]

SR (B010101): Status Register
IR (B010110): Information Register
Receive Level Indication: RL0 is the LSB and RL3 is the MSB of a 4-bit nibble that is used to indicate the inbound
signal strength. Convert the binary to decimal and multiply by -2.5dB. The result indicates the approximate
attenuation seen at the receiver inputs.
SYMBOL
SYMBOL
MSb
NLOOP
RL3
LOTC
TSCD
MSb
DFMO
LDN
QRSS
LUP
RL3
RL2
RL1
RL0
—
RCL
AIS
—
—
—
RL2
POSITION
POSITION
—
SR.7
SR.6
SR.4
SR.3
SR.2
SR.0
SR.5
SR.1
IR.1
IR.7
IR.6
IR.5
IR.4
IR.3
IR.2
IR.0
DFMO
RL1
—
—
—
Set when the QRSS pattern is present at the receiver.
Set when the AIS pattern is present at the receiver.
Set when receiver has detected consecutive s set forth by CR4.2.
Cleared when the receiver detects 14 1s in a window of 112 clock
cycles.
—
—
—
—
Set when in-band loop-up code is being received.
Set when in-band loop-down code is being received.
Set when transmitter detects a short circuit.
Set when TCLK has not transitioned for approximately 5ms.
Set when transmitter detects open circuit.
Set when the in-band loop-up code is present at the receiver.
RL0
—
QRSS
LUP
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FUNCTION
FUNCTION
LDN
AIS
NLOOP
TSCD
LOTC
RCL
LSb
LSb