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Diffstat (limited to 'spi/enc28j60/README')
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diff --git a/spi/enc28j60/README b/spi/enc28j60/README new file mode 100644 index 0000000..47d0415 --- /dev/null +++ b/spi/enc28j60/README @@ -0,0 +1,35 @@ +------------------------------------------------------------------------------- +Microchip ENC28J60 +------------------------------------------------------------------------------- + +This is an example capture of the Microchip ENC28J60 SPI Ethernet chip. + +Details: +http://ww1.microchip.com/downloads/en/DeviceDoc/39662e.pdf + + +enc28j60-init-and-ping.sr +------------------------- + +Capture contains the following 3 stages: + +1) Initialization phase where control registers are written. +2) Polling phase that waits for the Ethernet link to be up. +3) Two round-trips of ping packets (each consists of 1 RX of ICMP Echo Request + packet and 1 TX of ICMP Echo Reply packet). + +The chip was driven by a custom STM32F446 board running custom bare-metal +firmware. + + +Logic analyzer setup +-------------------- + +The logic analyzer used was a DSLogic Plus (at 50MHz, with SPI clock at 16MHz): + + Probe ENC28J60 + -------------------- + 0 CS# + 1 MISO + 2 CLK + 3 MOSI |