CS61310(2003) View Datasheet(PDF) - Cirrus Logic
Part Name
Description
Manufacturer
CS61310 Datasheet PDF : 30 Pages
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CS61310
2.13 Control Register 1: Address 0x10
7 (MSB)
TAOS
6
LLOOP
5
RLOOP
4
LBO2
3
LBO1
2
CODER
TAZ
1
NLOOP
0 (LSB)
LOS
TAOS
Transmit All Ones Select
When TAOS = 1, all ones are transmitted at the TCLK frequency
LLOOP
Local Loopback
When LLOOP = 1, data input at TPOS, TNEG (TDATA) is internally looped back and output on
RPOS, RNEG (RDATA). TCLK is routed to RCLK, through the jitter attenuator, if activated.
RLOOP
Remote Loopback
When RLOOP = 1, clock and data recovered by the receiver are sent back through the transmit
path and retransmitted. The clock and data are routed through the jitter attenuator, if activated.
LBO2, 1
Line BuildOut
LBO2
LBO1
0
0
0
1
1
0
1
1
Attenuation
0 dB
-7.5 dB
-15 dB
-22.5 dB
CODER
Zero Substitution (valid only when TNEG (UBS) is tied high, invoking coder mode).
(TAZ)
Setting CODER to “1” enables B8ZS encoding and decoding.
When not in coder mode (TPOS/TNEG are data inputs) setting TAZ to “1” causes all zeros to
be transmitted.
NLOOP
Network Loopback
NLOOP = 1 when a network loopback code has been detected on the received signal.
An interrupt will occur when NLOOP changes state unless a “1” is written to NLOOP disabling
the interrupt.
LOS
Loss Of Signal
LOS = 1 when the loss of signal criteria have been met (175 zeros).
LOS = 0 when a valid signal is being received.
An interrupt will occur when LOS changes state unless a “1” is written to LOS disabling the in-
terrupt.
2.14 Control Register 2: Address 0x11
7 (MSB)
AIS
6
RAMPLSE
5
RSVD
set to “0”
4
LOOPDN
3
LOOPUP
2
RPWDN
1
TxHIZ
0 (LSB)
RSVD
set to “0”
AIS
RAMPLSE
LOOPDN
Alarm Indication Signal.
AIS = 1 when an all ones pattern is present at the receiver. This bit is reset to “0” by the first
read occurring after the AIS condition has cleared.
An interrupt will occur when AIS is present unless a “1” is written to AIS disabling the interrupt.
When RAMPLSE = 1, output pulse shapes are determined by the codes in the internal, pro-
grammable, transmit RAM.
Loop Down
Setting LOOPDN to “1” causes the data pattern 001... to be repetitively transmitted.
14
DS440F1 FEB ‘03
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