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more 34xx variants

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2577 7894878c-1315-0410-8ee3-d5d059ff63e0
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Mark D. Studebaker committed 2004-06-03 22:30:46 +00:00
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commit ef54071b5f
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+16 -8
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doc/chips/eeprom
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@@ -15,7 +15,8 @@ Supported chips:
Philips (www.semiconductor.philips.com),
Rohm (www.rohm.com),
ST (www.st.com),
Xicor (www.xicor.com)
Xicor (www.xicor.com),
and others.
Chip Size (bits) Address
24C01 1K 0x50 (shadows at 0x51 - 0x57)
@@ -27,8 +28,13 @@ Supported chips:
0x53, 0x55, 0x56, 0x57)
24C16 16K 0x50 (additional data at 0x51 - 0x57)
Sony 2K 0x57
Atmel 34C02B 2K 0x50 - 0x57, SW write protect at 0x30-37
Catalyst 34FC02 2K 0x50 - 0x57, SW write protect at 0x30-37
Catalyst 34RC02 2K 0x50 - 0x57, SW write protect at 0x30-37
Fairchild 34W02 2K 0x50 - 0x57, SW write protect at 0x30-37
Microchip 24AA52 2K 0x50 - 0x57, SW write protect at 0x30-37
ST M34C02 2K 0x50 - 0x57, SW write protect at 0x30-37
ST M34C02 2K 0x50 - 0x57, SW write protect at 0x30-37
Author: Frodo Looijaard <frodol@dds.nl> and Philip Edelbrock
@@ -60,15 +66,17 @@ Description
This is a simple EEPROM module meant to enable reading the first 256 bytes
of an EEPROM (on a SDRAM DIMM for example). However, it will access serial
EEPROMs on any I2C adapter. This module will probably need to be
expanded. A /dev file interface would probably be more effective.
EEPROMs on any I2C adapter. The supported devices are generically
called 24Cxx, and are listed above; however the numbering
for these industry-standard devices may vary by manufacturer.
This module was a programming exercise to get used to the new project
organization laid out by Frodo, but it should be at least completely
effective for decoding the contents of EEPROMs on DIMMs.
DIMMS will typically contain a 24C01A or 24C02. The other devices
will not be found on a DIMM because they respond to more than one
address.
DIMMS will typically contain a 24C01A or 24C02, or the 34C02 variants.
The other devices will not be found on a DIMM because
they respond to more than one address.
DDC Monitors may contain any device. Often a 24C01, which responds
to all 8 addresses, is found. See the 'ddcmon' driver which has
@@ -80,7 +88,7 @@ eeprom.
Recent Sony Vaio laptops have an EEPROM at 0x57. We couldn't get the
specification, so it is guess work and far from being complete.
The Microchip 24AA52/24LCS52 and the ST M34C02 support an additional
The Microchip 24AA52/24LCS52, ST M34C02, and others support an additional
software write protect register at 0x30 - 0x37 (0x20 less than the
memory location). The chip responds to "write quick" detection at this
address but does not respond to byte reads.