QT2022/32 - Data Sheet: DS3051
RX_ALARM
RX_ALARM is used to indicate that a fault has occurred on the receive path. RX_ALARM is the bitwise OR of the-
receive path status register bits in register 1.9003h. RX_ALARM can be programmed to assert only when specific
receive path fault conditions are present. The programming is performed by writing to a mask register at address
1.9000h. The contents of register 1.9003h is AND’ed with register 1.9000h prior to application of the OR function to
generate the RX_ALARM signal.
RX_ALARM = {OR of (reg 1.9003.n ‘bit wise AND’ reg 1.9000.n) for n=0..9})
Table 24: Receive Alarm Registers (RX_ALARM)
MDIO Status Register
(RO)
MDIO Enable Register (R/
W)
Definition
LEGACY=0 LEGACY=1
Description
16b hex
type
RO/LH
16b hex
default value
PHY_XS Receive Local Fault
(MDIO 4.8.10 = 1.0008.a h)
NOT (XAUI PLL locked)
1.9003.0
1.9000.0
1
rx_flag
bitwise OR of rx_flag register, 1.9007h
1.9003.1
1.9003.2
1.9003.3
RO/LH
RO/LH
RO/LH
1.9000.1
1.9000.2
1.9000.3
0
0
1
PCS Receive Code Violation
PCS Receive Local Fault
invalid 66b code word detected
NOT(block_lock)
(linked to 3.8.10)
PMA Receive Local Fault
NOT(ReceivePLL
Lock)
NOT(ReceivePLL
Lock) or
1.9003.4
RO/LH
1.9000.4
1
(linked to 1.8.10)
RXLOSB_I==0
(linked to 1.8.10)
Receive Optical Power Fault 1
PHY_XS Receive Rate Error
WIS Alarm Interrupt Flag 2
1.A071h.7 OR
1.A071h.6
Reserved, RO
1.9003.5
1.9003.6
1.9003.7
1.9003.8
1.9003.9
1.9003.f:a
RO
1.9000.5
1.9000.6
1.9000.7
1.9000.8
1.9000.9
1.9000.f:a
1, LEGACY=0
0, LEGACY=1
Receive FIFO overflow/underflow error
(4.C002h.7 OR 4.C002h.6)
RO/LH
RO
0
0
0
0
0
bitwise OR of WIS ALARM INTERRUPT
register, 2.33 (2.21h)
WIS Extended Alarm Interrupt
Flag 2
bitwise OR of WIS EXTENDED ALARM
INTERRUPT register, 2.C502h
RO
WIS Local Fault 2
NOT(SONET frame sync)
(linked to 2.1.7)
RO/LH
RO
Reserved, set to 0
1.
undefined if LEGACY = 1.
2.
Valid in QT2032 WAN mode only. In QT2022, these alarms are Reserved, RO (including QT2032 in LAN mode).
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