QT2022/32 - Data Sheet: DS3051
Table 26: Transmit Alarm Registers (TX_ALARM) (Continued)
MDIO Status
Register (RO)
Alarm Definition
MDIO Enable Register (R/W)
default
LEGACY
=0
LEGACY
1
Description
LEGACY=0
LEGACY=1
16b hex
type
16b hex
PMA transmit local
fault
Transmit PLL not
locked
(Transmit PLL not
locked) OR
(TXFAULT)
1.9004.4
RO/LH
1.9001.4
1
0
(linked to 1.8.11)
(linked to 1.8.11)
latched version of
txlock
NOT(Fiber transmit PLL locked)
(reflects value in 1.C001h.0)
1.9004.5
1.9004.6
RO/LH
RO/LH
1.9001.5
1.9001.6
latched version of
TXFAULT (based on
input pin)
TXFAULT
0
1
Laser Output Power
Fault 1
DOM alarm
1.A070h.1:0
Reserved, RO
1.9004.7
1.9004.8
1.9004.9
1.9004.a
1.9004.f:b
RO
1.9001.7
1.9001.8
1.9001.9
1.9001.a
1.9001.f:b
1
1
1
n/a
n/a
n/a
Laser Temperature
Fault 1
DOM alarm
1.A070h.7:6
Reserved, RO
Reserved, RO
RO
Laser Bias Current
Fault 1
DOM alarm
1.A070h.3:2
RO
PHY_XS code error
TxXAUI invalid 8b/10b code word detected
(logical OR of 4.C006h.3:0
RO/LH
RO
0
reserved, set to 0
n/a
1. undefined if LEGACY = 1.
tx_flag
tx_flag is used to flag a DOM transmit alarm.
tx_flag = {OR of (reg 1.A070.n ‘bit wise AND’ reg 1.9006.n) for n=0 to 7}
Table 27: tx_flag Alarm Registers
MDIO Enable
Register default
value
MDIO Status Register (RO/
MDIO Enable
Register (R/W)
Description
Transmit Temperature High Alarm
Transmit Temperature Low Alarm
tx_flag alarm bits 4 and 5*
LH)
1.A070h.7
1.A070h.6
1.A070h.5:4
1.A070h.3
1.A070h.2
1.A070h.1
1.A070h.0
1.9006h.7
0
0
0
0
0
0
0
1.9006h.6
1.9006h.5:4
1.9006h.3
1.9006h.2
1.9006h.1
1.9006h.0
Laser Bias Current High Alarm
Laser Bias Current Low Alarm
Laser Output Power High Alarm
Laser Output Power Low Alarm
66
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