
34
ICS1890
Extended Control Register 2 (register 19
[0X13]
)
Extended Control Register 2 (register 19)
Node/Repeater Configuration (bit 15)
This bit directly reflects the status of the NOD/REP pin.
When this bit is logic zero, the device will default to Node
operation. SQE test will default to on. Carrier sense in half
duplex mode will be on transmit or receive activity.
When this bit is logic one, the device will default to Repeater
operation. SQE test will default to off. Carrier sense in half
duplex mode will be on receive activity only.
Hardware/Software Priority Status (bit 14)
This bit directly reflects the status of the HW/SW pin.
When this bit is logic zero, hardware pins have priority over
software settings. The 10/100SEL pin becomes an input and
controls speed selection. The DPXSEL pin becomes an input
and controls duplex selection. The ANSEL pin becomes an
input and chooses configuration with or without Auto-
Negotiation.
When configuration through Auto-Negotiation is selected,
the DPXSEL and 10/100SEL settings control the Auto-
Negotiation register 4 default settings and Auto-Negotiation
is enabled. When configuration without Auto-Negotiation is
selected, DPXSEL controls the duplex setting and 10/100SEL
controls the data rate setting.
When this bit is a logic one, software bits have priority over
hardware pin settings. The 10/100SEL pin becomes an output
indicating the link speed when LSTA the link is established
and parallels bit (17:15). The DPXSEL pin becomes an output
indicating the link duplex state when the link is established
and parallels bit (17:14). The ANSEL pin becomes an output
indicating whether auto-negotiation is being used and parallels
bit (0:12).
Bit
Definition
When bit=0
When bit=1
Access
Default
NOD/-
REP
HW/S-
W
Hex
15
Node/Repeater Mode
Node Mode
Repeater Mode
RO
14
Hardware/Software Priority
Hardware Priority
Software Priority
RO
13
Link Partner Supports
Remote Fault
Reserved for ICS
Reserved for ICS
Transmitted Remote Fault
Status
Reserved for ICS
Reserved for ICS
Reserved for ICS
Reserved for ICS
Reserved for ICS
A-N Power-up Remote Fault
Reserved for ICS
Reserved for ICS
Reserved for ICS
Automatic 100Base-TX
Power-down
unknown
partner supports Remote Fault
RO
0
12
11
Read unspecified
Read unspecified
RW /0
RW /0
-
-
10
RF bit in transmitted LCW=0
RF bit in transmitted LCW=1
RW /0
-
9
8
7
6
5
4
3
2
1
Read unspecified
Read unspecified
Read unspecified
Read unspecified
Read unspecified
Normal
Read unspecified
Read unspecified
Read unspecified
RW /0
RW /0
RW /0
RW /0
RW /0
RW
RW /0
RW /0
RW /0
-
-
-
-
-
0
0
-
0
Remote Fault on Power-up
0
Never Power-down automatically
Power-down automatically
RW
1