[sigrok-dumps.git] / spi / adns5020 / README

-------------------------------------------------------------------------------
Avago ADNS-5020
-------------------------------------------------------------------------------

This directory contains a capture of the communication between a Cypress
CY7C63813 and an Avago ADNS-5020 optical mouse sensor.

This is the internals of a fairly generic Dell optical mouse.

It is not nearly a complete sample of what types of traffic are possible,
specifically, it doesn't include a capture of "Burst Mode" traffic, which the
mouse firmware doesn't appear to use, even though Avago "highly recommends"
that burst mode be used for all devices.


adns5020-cy7c63813_init.sr
--------------------------

Captures the traffic from power on of the device (USB plug in) for 1 second.
Traces the initialization and reset pins as well as some general traffic.


Logic analyzer setup
--------------------

The logic analyzer used was a generic Saleae Logic clone (at 6MHz).

Avago documents max speed as 1MHz. 6MHz is used to try and avoid catching
any glitches on CS.

  Probe  Pin     Description
  --------------------------
  0      VDD     Used to trigger sampling
  3      SDIO    Bidir, but we use the MOSI stack from SPI
  4      SCK     SPI clock
  5      NCS     Chip select
  6      NRESET  Chip reset
  7      XY_LED  Chip LED control, not used by this configuration


Data
----

The sigrok command line used was:

  sigrok-cli -d fx2lafw --config samplerate=6M --time 1s \
             -o adns5020-cy7c63813_init.sr -t VDD=r \
             --channels 3=SDIO,5=NCS,4=SCK,6=NRESET,7=XY_LED,0=VDD
Commit	Line	Data
13c49dff KP	1	-------------------------------------------------------------------------------
	2	Avago ADNS-5020
	3	-------------------------------------------------------------------------------
	4
	5	This directory contains a capture of the communication between a Cypress
	6	CY7C63813 and an Avago ADNS-5020 optical mouse sensor.
	7
	8	This is the internals of a fairly generic Dell optical mouse.
	9
	10	It is not nearly a complete sample of what types of traffic are possible,
	11	specifically, it doesn't include a capture of "Burst Mode" traffic, which the
	12	mouse firmware doesn't appear to use, even though Avago "highly recommends"
	13	that burst mode be used for all devices.
	14
	15
	16	adns5020-cy7c63813_init.sr
	17	--------------------------
	18
	19	Captures the traffic from power on of the device (USB plug in) for 1 second.
	20	Traces the initialization and reset pins as well as some general traffic.
	21
	22
	23	Logic analyzer setup
	24	--------------------
	25
	26	The logic analyzer used was a generic Saleae Logic clone (at 6MHz).
	27
	28	Avago documents max speed as 1MHz. 6MHz is used to try and avoid catching
	29	any glitches on CS.
	30
	31	Probe Pin Description
	32	--------------------------
	33	0 VDD Used to trigger sampling
	34	3 SDIO Bidir, but we use the MOSI stack from SPI
	35	4 SCK SPI clock
	36	5 NCS Chip select
	37	6 NRESET Chip reset
	38	7 XY_LED Chip LED control, not used by this configuration
	39
	40
	41	Data
	42	----
	43
	44	The sigrok command line used was:
	45
	46	sigrok-cli -d fx2lafw --config samplerate=6M --time 1s \
	47	-o adns5020-cy7c63813_init.sr -t VDD=r \
	48	--channels 3=SDIO,5=NCS,4=SCK,6=NRESET,7=XY_LED,0=VDD
	49