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Based on kernel version 3.13. Page generated on 2014-01-20 22:05 EST.

1	Kernel driver w1_ds28e04
2	========================
3	
4	Supported chips:
5	  * Maxim DS28E04-100 4096-Bit Addressable 1-Wire EEPROM with PIO
6	
7	supported family codes:
8		W1_FAMILY_DS28E04	0x1C
9	
10	Author: Markus Franke, <franke.m@sebakmt.com> <franm@hrz.tu-chemnitz.de>
11	
12	Description
13	-----------
14	
15	Support is provided through the sysfs files "eeprom" and "pio". CRC checking
16	during memory accesses can optionally be enabled/disabled via the device
17	attribute "crccheck". The strong pull-up can optionally be enabled/disabled
18	via the module parameter "w1_strong_pullup".
19	
20	Memory Access
21	
22		A read operation on the "eeprom" file reads the given amount of bytes
23		from the EEPROM of the DS28E04.
24	
25		A write operation on the "eeprom" file writes the given byte sequence
26		to the EEPROM of the DS28E04. If CRC checking mode is enabled only
27		fully aligned blocks of 32 bytes with valid CRC16 values (in bytes 30
28		and 31) are allowed to be written.
29	
30	PIO Access
31	
32		The 2 PIOs of the DS28E04-100 are accessible via the "pio" sysfs file.
33	
34		The current status of the PIO's is returned as an 8 bit value. Bit 0/1
35		represent the state of PIO_0/PIO_1. Bits 2..7 do not care. The PIO's are
36		driven low-active, i.e. the driver delivers/expects low-active values.
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