78Q2120C Teridian Semiconductor Corp. (TDK Semiconductor), 78Q2120C Datasheet - Page 18

• Manufacturer Part Number: 78Q2120C
• Description: 10/100 Ethernet PHYS
• Manufacturer: Teridian Semiconductor Corp. (TDK Semiconductor)

MR17: Interrupt Control/Status Register (continued)
MR18: Diagnostic Register
© 2003 TDK Semiconductor Corporation, Proprietary and Confidential
18.14:13
17.3
17.2
17.1
17.0
18.7:0
18.15
18.12
18.11
18.10
Bit
18.9
18.8
Bit
LS_CHG_INT
RFAULT_INT
LP-ACK_INT
COMP_INT
RX_LOCK
RX_PASS
Symbol
Symbol
ANEGF
ANEG-
RSVD
RSVD
RSVD
RATE
DPLX
Type
R/W
R/W
RC
Type
R
R
R
R
R
RC
RC
RC
RC
Default Description
Default Description
00h
00h
0
0
0
0
0
0
0
0
0
0
Reserved
Reserved: Must set to ‘00h’.
Auto-Negotiation Fail Indication:
negotiation completes and no common technology was found. It
remains set until read.
Duplex Indication:
negotiation for duplex arbitration as follows:
Rate Indication: This bit indicates the result of the auto-negotiation
for data rate arbitration as follows:
Receiver Pass Indication: In 10Base-T mode, this bit indicates that
Manchester data has been detected.
indicates that the receive signal activity has been detected (but not
necessarily locked on to).
Receive PLL Lock Indication: Indicates that the Receive PLL has
locked onto the receive signal for 100Base-TX operation.
Reserved: Must set to ‘00h’.
Link Partner Acknowledge Interrupt: This bit is set high by the
auto-negotiation logic when FLP bursts are received with the
acknowledge bit set.
Link Status Change Interrupt:
transitions from an OK status to a FAIL status.
Remote Fault Interrupt:
condition has been indicated by the link partner.
Auto-Negotiation Complete Interrupt: This bit is set by the auto-
negotiation logic upon successful completion of auto-negotiation.
0 : Half-duplex was the highest common denominator
1 : Full-duplex was the highest common denominator
0 : 10Base-T was the highest common denominator
1 : 100Base-TX was the highest common denominator
- 18 -
10/100BASE-TX Transceiver
This bit indicates the result of the auto-
This bit is set when a remote fault
This bit is set when the link
This bit is set when auto-
In 100Base-TX mode, it
78Q2120C
Rev_1.1