1 -------------------------------------------------------------------------------
2 Dallas DS1985 16kbit Add-Only iButton
3 -------------------------------------------------------------------------------
5 This is a set of example captures of the 1-Wire traffic from a
6 Dallas DS1985 iButton device.
8 This specific iButton device has a registration number of 0x05000000586ce20b
9 (family code: 0x05, serial number: 0x000000586ce2, CRC: 0x0b).
11 The device has the following markings:
19 The "1-Wire/iButton Drivers for Windows" 4.03 software was used with a
20 Maxim DS9097U-E25 serial port 1-Wire interface adapter (which itself
21 contains a Maxim DS2480B serial 1-Wire line driver chip).
22 The DS9097U-E25 was attached to a PC using a USB-to-serial adapter.
24 The following information can be seen in the Windows software for the
25 respective dumps (when clicking on the respective tabs/entries):
29 - The Windows software was configured as follows:
30 - Device poll rate: 1 second
31 - 1-Wire search mode: Show normal devices
35 - Contents: all-0xff (pages 0 - 63, each page 32 bytes in size)
37 - Bank size: 2048 bytes
38 - General-purpose/non-volatile/read-only/read-write/write-once: Y/Y/N/N/Y
42 - Contents: ff ff ff ff ff ff ff ff
45 - General-purpose/non-volatile/read-only/read-write/write-once: N/Y/N/N/Y
47 Write protect redirection:
51 - General-purpose/non-volatile/read-only/read-write/write-once: N/Y/N/N/Y
53 Bitmap of used pages for file structure:
57 - General-purpose/non-volatile/read-only/read-write/write-once: N/Y/N/N/Y
59 Page redirection bytes:
61 - Contents: all-0xff (pages 0 - 3, each page 16 bytes in size)
62 - Start address: 0x100
64 - General-purpose/non-volatile/read-only/read-write/write-once: N/Y/N/N/Y
67 https://en.wikipedia.org/wiki/1-Wire
68 http://www.maxim-ic.com/datasheet/index.mvp/id/2827/t/al
69 http://www.maxim-ic.com/app-notes/index.mvp/id/192
70 http://www.maxim-ic.com/datasheet/index.mvp/id/2983/t/al
71 http://www.maxim-ic.com/app-notes/index.mvp/id/192
77 The logic analyzer used was a Saleae Logic (at 8MHz):
80 -----------------------
83 The sigrok command line used was:
85 sigrok-cli -d fx2lafw:samplerate=8mhz --time 5s -p 1=OWR -o <file>