Questions tagged [phy]
The phy tag has no summary.
176 questions
0 votes
2 answers
82 views
Understanding Tready Timing with EEPROM Connected to PHY (Max Tready 120ms)
I’m working with a PHY device as described in the datasheet (p. 158) of this PHY, and I’m trying to understand the Tready timing with an EEPROM connected to the device. According to the datasheet, the ...
- 1,821
0 votes
1 answer
108 views
Gigabit Ethernet Phy Unused interface
I am working with the MXL86111I-AQB-R GBE Ethernet PHY and using RGMII instead of SGMII. Since the SGMII interface is not used, I am unsure how to properly handle the related pins: Pin 38 (RX0_P) – ...
- 824
1 vote
1 answer
108 views
Interfacing Ethernet PHY
I am using this MPU and connecting it to an RJ45 as shown in the Figure 7-4 on page 24. Usually, with ethernet PHY interface I see 2 LEDs on the RJ45 connector indicating link status and activity on ...
- 1,821
-1 votes
1 answer
63 views
spreading factor in LoRa PHY (CSS)
I wonder how the spreading factor (SF) is defined in LoRa PHY. Specifically, in other spread spectrum techniques (e.g DS, FH), we have: W = R * SF W is the (spread) bandwidth, and R is the symbol rate....
- 69
1 vote
2 answers
507 views
Ethernet 1G Magnetic swap is possible?
I have the following circuit with Ethernet switch that connect to quad magnetic, my layout engineer required me to swap for easier layout. Pay attention - the swap will be only in the magnetic side, ...
- 553
1 vote
1 answer
344 views
Connecting two W5500 via UDP results in PHY link off
I want to connect two STM32F4 and to communicate via UDP. At the moment I only want to send data from one to another mcu. I have tested tx and rx communication separately with PC - python scripts and ...
- 109
1 vote
1 answer
536 views
LAN8720 MDC (SMI Clock) and/or ringing issue
I had always difficult times with designs having LAN8720 device on it. It behaves differently with each design (this is understandable and even I carefully design it according to the design ...
- 283
2 votes
5 answers
473 views
Ethernet PHY and their corresponding hardware are represented Right to Left in most datasheets and application notes schematic. Why?
What's the matter? If you are here for complicated applied physics, you'll be quite disappointed. This post is just about a bit of electronic world trivia. I am currently designing a board with two ...
- 173