Protocol analysis
R&S
®
RTO6
743
User Manual 1801.6687.02 ─ 05
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PHYAD = address of a physical layer entity (in Clause 22)
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PRTAD = address of a port (in Clause 45)
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REGAD = register address within a PHY (in Clause 22)
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DEVAD = device address within a port (in Clause 45)
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TA = turnaround time, a 2-bit time spacing between REGAD/DEVAD and DATA.
The turnaround provides the slave some time to answer upon a read command. TA
is hard-wired even in write commands, although it is not required there.
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ADDRESS / DATA = address or payload data, 16
bits
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IDLE = A single value (high-impedance state) indicating to the Physical Medium
Attachment (PMA) that there is no data to convey
Instead of a specific hardware trigger, the option R&S
RTO6-K540 uses a predefined
generic serial bus pattern trigger. It simply triggers on a bit pattern in the data stream.
This is fast, but limited in the complexity of the conditions.
The MDIO trigger settings allow you to define the MDIO fields individually. The firm-
ware concatenates the settings to a single search pattern that is then used by the
serial bus pattern.
While this design is simple, it does not allow triggering on a data range or even
inequality. This explains the much simpler structure compared to other protocols.
13.16.2
MDIO configuration
13.16.2.1
MDIO configuration settings
Access: [Bus] > "MDIO" > "Setup" tab
Make sure that the tab of the correct serial bus is selected.
MDIO (option R&S
RTO6-K540)
