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Merge branch 'feature/enc28j60_not_new_design_v5.0' into 'release/v5.0'

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Ethernet examples: added warning that ENC28J60 is not recommended for new designs (v5.0)

See merge request espressif/esp-idf!21546
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morris
2022-12-12 11:41:19 +08:00
parent 987e6b4e29 a811ea38b9
commit 6321e24bac
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examples/ethernet/enc28j60/README.md
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# ENC28J60 Example # ENC28J60 Example
(See the README.md file in the upper level 'examples' directory for more information about examples.) (See the README.md file in the upper level 'examples' directory for more information about examples.)
---
## !!! Warning !!!
Espressif doesn't recommend using ENC28J60 Ethernet controller in new designs based on ESP32 series of chips. This is due to the following facts:
* ENC28J60 has low performance in half-duplex mode and various errata exist to the half-duplex mode.
* ENC28J60 does not support automatic duplex negotiation when configured to full-duplex mode.
* ENC28J60 has high current consumption - up to 180mA in comparison to e.g. 79mA of `W5500` or 75mA of `KSZ8851SNL` @ 10Mbps Tx.
Therefore, we rather recommend using `W5500`, `KSZ8851SNL` or `DM9051`, which are also supported in ESP-IDF.
---
## Overview ## Overview
ENC28J60 is a standalone Ethernet controller with a standard SPI interface. This example demonstrates how to drive this controller as an SPI device and then attach to TCP/IP stack. ENC28J60 is a standalone Ethernet controller with a standard SPI interface. This example demonstrates how to drive this controller as an SPI device and then attach to TCP/IP stack.