[sigrok-dumps.git] / lens_mounts / sony_emount / README

-------------------------------------------------------------------------------
Sony E-mount camera/lens
-------------------------------------------------------------------------------

These are dumps from a Sony E-mount camera/lens.

Details:
https://en.wikipedia.org/wiki/Sony_E-mount

These were taken using a modified 16mm Meike extension tube that brings out
each lens contact to a 10-pin ribbon cable.

Pinout of the mount is as follows (these pins are from left to right
looking at a lens from the rear):

1: LENS_GND - Lens motor GND

2: LENS_POWER - Lens motor power
   Can be either 5.0V or unregulated Vbat (7.4V nominal) - This is somehow
   negotiated between body and lens.

3: LOGIC_GND - Ground for lens logic circuitry

4: BODY_VD_LENS - As-of-yet unknown body->lens signalling
   In nearly all cases, it is normally high but pulses low at a very low duty
   cycle at 60 Hz (is it 50 in EU?).

5: LOGIC_VCC - Lens logic power
   3.15V. All data lines described below are 3.15V logic high.

6: LENS_CS_BODY - Handshaking line from lens to body
   Always high when RXD is transferring data, normally low.

7: RXD - Serial data from lens to body
   Starts at 750 kbaud, usually negotiates up to 1.5 Mbaud during init.
   8N1, LSB-first.

8: TXD - Serial data from body to lens
   Same speeds as above.

9: BODY_CS_LENS - Handshaking line from body to lens
   Always high when TXD is transferring data.

10: LENS_XDETECT - (weakly) pulled high by the body
    Grounded to LOGIC_GND by the lens, or sometimes via 680 Ohm resistor
    (Viltrox EF-NEX II). Used to detect presence of a lens. Body will not
    output power unless this is grounded.


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

The logic analyzer used was an fx2lafw board (at 6MHz):

http://www.amazon.com/gp/product/B00ZOC23TK

  Probe       Lens mount
  ----------------------
  0           BODY_VD_LENS
  1           VCC
  2           LENS_CS_BODY
  3           RXD
  4           TXD
  5           BODY_CS_LENS


Data
----

Protocol (quick summary):

Data is only transmitted when a CS line goes high. Only one frame of data is
transmitted per high CS period. All frames start with 0xF0, followed by a
command ID byte. All frames end with 0x55, this is preceded by a 16-bit
checksum of the command ID byte plus all payload bytes. Checksum is least
significant byte first. Frames from body to lens are sometimes padded with
additional 0x00 bytes beyond 0x55.

A CS line can go high without any data being transmitted. This has so far
only been seen during a speed change.

The protocol appears to assume fixed frame lengths for a given command ID.
Occurrences of 0x55 within a frame are NOT escaped.

During "idle" operation, a low pulse of BODY_VD_LENS appears to trigger two
status response frames from the lens to the body, followed by two frames from
body to lens.

Summary of hardware used:

 - Body: Sony ILCE-A6000
 - Probe breakout: Meike 16mm macro extension tube with all pins wired out
   to a ribbon cable
 - Lenses:
   - Sony SEL55210 55-210mm zoom lens, initialization captured at both 55mm
     and 210mm zoom settings
   - Viltrox EF-NEX II adapter - Canon EF to Sony E mount electronic adapter
   - Canon EF 50mm/1.8 STM - Used with Viltrox adapter
   - Canon EF-S 24mm/2.8 STM - Used with Viltrox adapter
   - Sony SELP1650 16-50mm Power Zoom lens - Initialization only captured at
     the lens' default power-on focal length due to PZ + retractable lens

More details can be found in the dpreview thread at:
http://www.dpreview.com/forums/post/56133485
Commit	Line	Data
b7f9d252 AD	1	-------------------------------------------------------------------------------
	2	Sony E-mount camera/lens
	3	-------------------------------------------------------------------------------
	4
	5	These are dumps from a Sony E-mount camera/lens.
	6
	7	Details:
	8	https://en.wikipedia.org/wiki/Sony_E-mount
	9
	10	These were taken using a modified 16mm Meike extension tube that brings out
	11	each lens contact to a 10-pin ribbon cable.
	12
	13	Pinout of the mount is as follows (these pins are from left to right
	14	looking at a lens from the rear):
	15
	16	1: LENS_GND - Lens motor GND
	17
	18	2: LENS_POWER - Lens motor power
	19	Can be either 5.0V or unregulated Vbat (7.4V nominal) - This is somehow
	20	negotiated between body and lens.
	21
	22	3: LOGIC_GND - Ground for lens logic circuitry
	23
	24	4: BODY_VD_LENS - As-of-yet unknown body->lens signalling
	25	In nearly all cases, it is normally high but pulses low at a very low duty
	26	cycle at 60 Hz (is it 50 in EU?).
	27
	28	5: LOGIC_VCC - Lens logic power
	29	3.15V. All data lines described below are 3.15V logic high.
	30
	31	6: LENS_CS_BODY - Handshaking line from lens to body
	32	Always high when RXD is transferring data, normally low.
	33
	34	7: RXD - Serial data from lens to body
	35	Starts at 750 kbaud, usually negotiates up to 1.5 Mbaud during init.
	36	8N1, LSB-first.
	37
	38	8: TXD - Serial data from body to lens
	39	Same speeds as above.
	40
	41	9: BODY_CS_LENS - Handshaking line from body to lens
	42	Always high when TXD is transferring data.
	43
	44	10: LENS_XDETECT - (weakly) pulled high by the body
	45	Grounded to LOGIC_GND by the lens, or sometimes via 680 Ohm resistor
	46	(Viltrox EF-NEX II). Used to detect presence of a lens. Body will not
	47	output power unless this is grounded.
	48
	49
	50	Logic analyzer setup
	51	--------------------
	52
	53	The logic analyzer used was an fx2lafw board (at 6MHz):
	54
	55	http://www.amazon.com/gp/product/B00ZOC23TK
	56
	57	Probe Lens mount
	58	----------------------
	59	0 BODY_VD_LENS
	60	1 VCC
	61	2 LENS_CS_BODY
	62	3 RXD
	63	4 TXD
	64	5 BODY_CS_LENS
65
66
67	Data
68	----
69
70	Protocol (quick summary):
71
72	Data is only transmitted when a CS line goes high. Only one frame of data is
73	transmitted per high CS period. All frames start with 0xF0, followed by a
74	command ID byte. All frames end with 0x55, this is preceded by a 16-bit
75	checksum of the command ID byte plus all payload bytes. Checksum is least
76	significant byte first. Frames from body to lens are sometimes padded with
77	additional 0x00 bytes beyond 0x55.
78
79	A CS line can go high without any data being transmitted. This has so far
80	only been seen during a speed change.
81
82	The protocol appears to assume fixed frame lengths for a given command ID.
83	Occurrences of 0x55 within a frame are NOT escaped.
84
85	During "idle" operation, a low pulse of BODY_VD_LENS appears to trigger two
86	status response frames from the lens to the body, followed by two frames from
87	body to lens.
88
89	Summary of hardware used:
90
91	- Body: Sony ILCE-A6000
92	- Probe breakout: Meike 16mm macro extension tube with all pins wired out
93	to a ribbon cable
94	- Lenses:
95	- Sony SEL55210 55-210mm zoom lens, initialization captured at both 55mm
96	and 210mm zoom settings
97	- Viltrox EF-NEX II adapter - Canon EF to Sony E mount electronic adapter
98	- Canon EF 50mm/1.8 STM - Used with Viltrox adapter
99	- Canon EF-S 24mm/2.8 STM - Used with Viltrox adapter
100	- Sony SELP1650 16-50mm Power Zoom lens - Initialization only captured at
101	the lens' default power-on focal length due to PZ + retractable lens
102
103	More details can be found in the dpreview thread at:
104	http://www.dpreview.com/forums/post/56133485
105