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ICS1889 Datasheet(PDF) 16 Page - Integrated Circuit Systems

Part # ICS1889
Description  100Base-FX Integrated PHYceiverTM
PDF  35 Pages
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Manufacturer  ICST [Integrated Circuit Systems]
Direct Link  http://www.icst.com
Logo ICST - Integrated Circuit Systems

ICS1889 Datasheet(HTML) 16 Page - Integrated Circuit Systems

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16
ICS1889
QuickPoll Status Register (register 17)
The QuickPoll status register is a 16-bit read only register
used to indicate the comprehensive status of the ICS1889. All
register status bits that might need to be repetitively examined
at run time are located in this register, even though some bits
duplicate functionality from other registers. This allows the
device status to be rapidly obtained with a single register
access.
The register is accessed via the management interface of the
MII. It can always be read and may be written by setting the
override bit in the Configuration Register (register 16, bit 15)
and then performing a write operation. It is initialized during a
power-up or reset to predefined default values.
QuickPoll Status Register (register 17)
BIT
Definition
When bit = 0
When bit = 1
Access
Default
15
Data Rate
Always a logic one
100 Mbps selected
RO
1
14
Duplex
Half duplex selected
Full duplex selected
RO
0 if PRIO=1 or
DPEN if PRIO=0
13
Reserved for ICS
Read unspecified
RO
—
12
Reserved for ICS
Read unspecified
RO
—
11
Reserved for ICS
Read unspecified
RO
—
10
Receive Signal Error Signal
Loss of signal
RO/LH
0
9
PLL Lock Error
PLL locked
PLL failed to lock
RO/LH
0
8
False Carrier Detect
Normal carrier or idle
False carrier detected
RO/LH
0
7
Invalid Symbol
Valid symbols
Invalid symbol detected
RO/LH
0
6
Halt Symbol
Normal symbols
HALT symbol detected
RO/LH
0
5
Premature End
Normal stream
Stream with two IDLES
RO/LH
0
4
Reserved for ICS
Read unspecified
RO
—
3
Reserved for ICS
Read unspecified
RO
—
2
Priority Pin State
Hardware
Software
RO
PRIO
1
Remote Fault
No remote fault detected
Remote fault detected
RO/LH
0
0
Link Status
Link is not valid
Link is valid
RO/LL
0



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