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VSC8658 датащи(PDF) 55 Page - Microsemi Corporation

номер детали VSC8658
подробное описание детали  Octal 10/100/1000BASE-T PHY and 100BASEFX/1000BASE-X SerDes
PDF  95 Pages
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производитель  MICROSEMI [Microsemi Corporation]
домашняя страница  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

VSC8658 датащи(HTML) 55 Page - Microsemi Corporation

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Configuration
VMDS-10242 VSC8658 Datasheet Revision 4.1
47
5.3.3
SerDes MAC/Media Control
Register 17E, which is accessible only when extended register access is enabled, controls the
transmitter and receiver of the VSC8658 device SerDes MAC/Media. The following table shows the
settings available.
5.3.4
CRC Good Counter
Register 18E makes it possible to read the contents of the CRC good counter; the number of CRC
routines that have executed successfully. The following table shows the readouts you can expect.
5.3.5
SIGDET Polarity Control
Register 19E controls the SIGDET pin polarity. The following table shows the settings available.
Table 39 •
SerDes MAC Control, Address 17E (0x11)
Bit
Name
Access
Description
Default
15:8
Reserved
RO
7:5
SerDes media output
swing control
R/W
This is a sticky bit.
000 = 400 mV (peak-to-peak).
001 = 600 mV (peak-to-peak).
010 = 800 mV (peak-to-peak).
011 = 1000 mV (peak-to-peak).
100 = 1200 mV (peak-to-peak).
101 = 1400 mV (peak-to-peak).
110 and 111 = Reserved.
100
4:2
SerDes MAC output
swing control
R/W
This is a sticky bit.
000 = 400 mV (peak-to-peak).
001 = 600 mV (peak-to-peak).
010 = 800 mV (peak-to-peak).
011 = 1000 mV (peak-to-peak).
100 = 1200 mV (peak-to-peak).
101 = 1400 mV (peak-to-peak).
110 and 111 = Reserved.
100
1:0
Reserved
RO
Table 40 •
CRC Good Counter, Address 18E (0x12)
Bit
Name
Access
Description
Default
15
Packet since last read RO
This is a self-clearing bit.
1 = Packet received since last read.
0
14
Reserved
RO
13:0
CRC good counter
contents
RO
This is a self-clearing bit.
Counter containing the number of packets
with valid CRCs; this counter does not
saturate and will roll over.
0x000
Table 41 •
SIGDET Polarity Control, Address 19E (0x13)
Bit
Name
Access
Description
Default
15:1
Reserved
RO
0
SIGDET pin polarity
R/W
1 = Active low.
0 = Active high.
CMODE



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