3.0 Registers
CX28394/28395/28398
3.12 Transmitter Registers
Quad/x16/Octal—T1/E1/J1 Framers
075—Transmit Alarm Signal Configuration (TALM)
Unused bits are reserved and should be written to 0.
7
6
5
4
3
2
1
0
—
AISCLK
AUTO_MYEL
AUTO_YEL
AUTO_AIS
TMYEL
TYEL
TAIS
AISCLK
Enable Automatic ACKI Switching—When AISCLK is active and the clock monitor reports a
loss of transmit clock [TLOC; addr 048], the transmitter clock is automatically switched to
reference TIACKI or EIACKI instead of TCKI. The transmitter is also forced to send AIS (all
ones) data. If both AISCLK and TAIS [addr 075] are active, AIS is transmitted using TIACKI
or EIACKI clock regardless of the clock monitor status. AISCLK should be set only if the
system supplies an alternate line rate clock on TIACKI for TI or EIACKI for EI applications.
Inputs
Status
RLOS
Transmit
CLOCK
TCKI
TAIS AUTO_AIS
AISCLK
TLOC
DATA
0
0
0
0
0
0
1
1
0
0
0
0
X
1
1
X
0
0
1
0
0
1
X
X
X
0
0
0
Normal
Normal
AIS
TCKI
X
1
1
TI/EIACKI
TCKI
0
Normal
Normal
AIS
1
0
1
TCKI
1
1
X
X
X
1
TCKI
X
X
0
X
X
X
1
TI/EIACKI
TCKI
AIS
AIS
TCKI
Normal
AIS
1
0
TI/E1ACKI
AUTO_MYEL/TMYEL Manual/Automatic Transmit Multiframe Yellow Alarm—Manual mode sends alarm for as
long as TMYEL is active. Automatic mode sends alarm for the duration of a receive loss of
multiframe alignment [SRED; addr 049].
INS_MYEL TMYEL AUTO_MYEL
Transmit Multiframe Yellow
Supplied by TPCMI
Inactive
0
1
1
1
X
0
X
0
0
1
Follows SRED status
Active
1
X
NOTE(S): To transmit T1DM yellow alarm (Y24), the processor must program TDL1,
TDL2, or TSLIP buffer to transmit Y-bit output in time slot 24.
AUTO_YEL /TYEL Manual/Automatic Transmit Yellow Alarm—Manual mode sends the alarm for as long as
TYEL is active and yellow alarm insertion [INS_YEL; addr 072] is enabled. Automatic mode
sends yellow alarm for the duration of a receive loss of frame alignment [FRED; addr 049].
INS_YEL
TYEL
AUTO_YEL
Transmit Yellow Alarm
Supplied by TPCMI
Inactive
0
1
1
1
X
0
X
0
0
1
Follows FRED status
Active
1
X
NOTE(S): To transmit T1DM yellow alarm (Y24), processor must program TDL1,
TDL2 or TSLIP buffer to transmit Y-bit output in time slot 24.
3-64
Conexant
100054E
CONEXANT [ CONEXANT SYSTEMS, INC ]
