Emerson ATCA-8310, Manual

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CPLD and FPGA
ATCA-8310 Installation and Use (6806800M72D)
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8.4.2.13 MDIO interface to Phy (MdioIfToPhy)
Resets:
6 SdaRead R 0b1: SdaReadHigh, if Sda line (Data) of
I2c is high
0b0: SdaReadLow, if Sda line (Data) of
I2c is low undef F F
5 SdaDirSet RW 0b1: SdaAsOutputSet, Sda line (Data) of
I2c is driven by Dsp Fpga
0b0: SdaAsInputSet, Sda line (Data) of
I2c is not driven by Dsp Fpga, thus data
from dsp can be read 0b0 X X
4 SdaValIfOutSet RW 0b1: SdaValSetHigh, Sda line (Data) of
I2c is driven high by Dsp Fpga if direction
is set as output
0b0: SdaValSetLow, Sda line (Data) of
I2c is driven low by Dsp Fpga if direction
is set as output 0b0 X X
3 - - reserved undef - -
2 SdcRead R 0b1: SdcReadHigh, if Sdc line (Clock) of
I2c is high
0b0: SdcReadLow, if Sdc line (Clock) of
I2c is low undef F F
1 SdcDirSet RW 0b1: SdcAsOutputSet, Sdc line (Clock)
of I2c is driven by Dsp Fpga
0b0: SdcAsInputSet, Sdc line (Clock) of
I2c is not driven by Dsp Fpga, thus data
from dsp can be read 0b0 X X
0 SdcValIfOutSet RW 0b1: SdcValSetHigh, Sdc line (Clock) of
I2c is driven high by Dsp Fpga if direction
is set as output
0b0: SdcValSetLow, Sdc line (Clock) of
I2c is driven low by Dsp Fpga if direction
is set as output 0b0 X X
Table 8-227 I2C Bit Bang Register (continued)
Bit Acronym Type Description Default Pwr Soft