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VSC8658 bảng dữ liệu(PDF) 62 Page - Microsemi Corporation

tên linh kiện VSC8658
Giải thích chi tiết về linh kiện  Octal 10/100/1000BASE-T PHY and 100BASEFX/1000BASE-X SerDes
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nhà sản xuất  MICROSEMI [Microsemi Corporation]
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Configuration
VMDS-10242 VSC8658 Datasheet Revision 4.1
54
5.4.3
GPIO Input
The input register contains information about the input to the device GPIO pins. Read from this register to
access the data on the device GPIO pins. The following table shows the readout you can expect.
5.4.4
GPIO Output
The output register allows you to access and control the output from the device GPIO pins. The following
table shows the values you can write.
5.4.5
GPIO Pin Configuration
Register 17G in the GPIO register space controls whether a particular GPIO pin functions as an input or
an output. The following table shows the settings available.
5.4.6
100BASE-FX Control
The 100BASE-FX control register can configure each PHY within the device to be in 100BASE-FX mode.
The following table shows the values that can be written.
Example 1 To configure all PHYs to 100BASE-FX mode, first ensure bit 15 = 0, then set bit 11 = 1 and
bits 7:0 = 0x01, and then reset bit 15 = 1.
Table 54 •
GPIO Input, Address 15G (0x0F)
Bit
Name
Access
Description
Default
15:0
GPIO [15:0] input
RO
Data read from the GPIO pins
0x00
Table 55 •
GPIO Output, Address 16G (0x10)
Bit
Name
Access
Description
Default
15:0
GPIO [15:0] output
R/W
Data written to the GPIO pins
0x00
Table 56 •
GPIO Input/Output Configuration, Address 17G (0x11)
Bit
Name
Access
Description
Default
15:0
GPIO [15:0] input or
output enable
R/W
1 = Pin is configured as an output.
0 = Pin is configured as an input.
0x00
Table 57 •
100BASE-FX Control, Address 18G (0x12)
Bit
Name
Access Description
Default
15
Activate 100BASE-FX
R/W
0 = No action
1 = Activate 100BASE-FX based on bits
11:0
0
14:12
Reserved
RO
000
11
100BASE-FX on all
PHYs
R/W
0 = No 100BASE-FX on all PHYs
1 = Configure 100BASE-FX on all PHYs
0
10:8
Individual 100BASE-FX
setting
R/W
PHY number to be configured for
100BASE-FX mode
000
7:0
100BASE-FX mode
R/W
0x00 = No 100BASE-FX
0x01 = 100BASE-FX mode
0x02 to 0xFF = Reserved
0x00



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