AC1040F Datasheet, PDF (24/37 Pages) List of Unclassifed Manufacturers – Ultra Low Power 10/100 Quad RMII Ethernet Transceiver

AC104QF
Ultra Low Power 10/100 Quad RMII Ethernet Transceiver
Register 18: Diagnostic Register
Reg.bit
18.[15:12]
18.11
18.10
18.9
18.8
18.[7:0]
Name
Reserved
DPLX
Speed
RX_PASS
RX_LOCK
Reserved
Description
The result of Auto-negotiation: Full-duplex =1;
Half-duplex = 0
The result of Auto-neg. for speed: 100base-TX = 1;
10Base-T = 0.
In 10BT mode, this bit indicates that Manchester data
has been detected.
In 100BT mode, it indicates valid signal has been
received but not necessarily locked on to.
Indicates the receive PLL has locked onto the received
signal for the selected speed of operation (10Base-T or
100Base-TX). This bit is set whenever a cycle-slip
occurs, and will remain set until it is read.
Mode
RO
RO
RO
RO
RO/RC
RO
Register 19: Power/Loopback Register
Reg.bit
19.[14:7]
19.6
19.5
19.[4:2]
19.1
19.0
Name
Reserved
TP125
Low Power
Mode
Reserved
NLP Link
Integrity Test
Reserved
Description
Reserved
Transmit transformer ratio selection.
1 = 1.25:1
0 = 1:1
The default value of this bit is controlled by TP125 pin.
1 = Enable advanced power saving mode.
0 = Disable advanced power saving mode.
Reserved
1 = In ANeg test mode, send NLP instead of FLP in order to
test NLP receive integrity.
0 = Sending FLP in ANeg test mode.
Reserved
Mode
RW
RW
RW
RW
RW
RW
Register 20: Cable measurement capability Register
Reg.bit
20.[15:8]
20.[7:4]
20.[3:0]
Name
Reserved
Cable
measurement
capability
Reserved
Description
These bits can be used as cable length indicator. The bits are
incremented from 0000 to 1111, with an increment of
approximately 10 meters. The equivalent is 0 to 32 dB with an
increment of 2 dB @ 100 MHz. The value is a read back from the
equalizer, and the measured value is not absolute.
Mode
RO
RO
RO
Register 21: Receive Error Counter
Reg.bit
Name
Description
21.[15:0] RX_ER Counter Count Receive Error Events
Mode
RO
Default
0
0
0
0
0
0
Default
00
0
1
00
0
0
Default
0
0
0
Default
0
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Document Revision 4.0
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