{sphinx.addnodesdocument)}( rawsourcechildren]( translations LanguagesNode)}(hhh](h pending_xref)}(hhh]docutils.nodesTextChinese (Simplified)}parenthsba attributes}(ids]classes]names]dupnames]backrefs] refdomainstdreftypedoc reftarget/translations/zh_CN/hwmon/jc42modnameN classnameN refexplicitutagnamehhh ubh)}(hhh]hChinese (Traditional)}hh2sbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget/translations/zh_TW/hwmon/jc42modnameN classnameN refexplicituh1hhh ubh)}(hhh]hItalian}hhFsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget/translations/it_IT/hwmon/jc42modnameN classnameN refexplicituh1hhh ubh)}(hhh]hJapanese}hhZsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget/translations/ja_JP/hwmon/jc42modnameN classnameN refexplicituh1hhh ubh)}(hhh]hKorean}hhnsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ reftarget/translations/ko_KR/hwmon/jc42modnameN classnameN refexplicituh1hhh ubh)}(hhh]hPortuguese (Brazilian)}hhsbah}(h]h ]h"]h$]h&] refdomainh)reftypeh+ 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TS3000B3, TS3000GB0, TS3000GB2, TS3001GB2 Datasheets: Available from IDT web site * Maxim MAX6604 Datasheets: https://www.analog.com/media/en/technical-documentation/data-sheets/MAX6604.pdf * Microchip MCP9804, MCP9805, MCP9808, MCP98242, MCP98243, MCP98244, MCP9843 Datasheets: https://ww1.microchip.com/downloads/en/DeviceDoc/22203C.pdf https://ww1.microchip.com/downloads/en/DeviceDoc/21977b.pdf https://ww1.microchip.com/downloads/en/DeviceDoc/25095A.pdf https://ww1.microchip.com/downloads/en/DeviceDoc/21996a.pdf https://ww1.microchip.com/downloads/en/DeviceDoc/22153c.pdf https://ww1.microchip.com/downloads/en/DeviceDoc/22327A.pdf * NXP Semiconductors SE97, SE97B, SE98, SE98A Datasheets: https://www.nxp.com/documents/data_sheet/SE97.pdf https://www.nxp.com/documents/data_sheet/SE97B.pdf https://www.nxp.com/documents/data_sheet/SE98.pdf https://www.nxp.com/documents/data_sheet/SE98A.pdf * ON Semiconductor CAT34TS02, CAT6095 Datasheet: https://www.onsemi.com/pub_link/Collateral/CAT34TS02-D.PDF https://www.onsemi.com/pub/Collateral/CAT6095-D.PDF * ST Microelectronics STTS424, STTS424E02, STTS2002, STTS2004, STTS3000 Datasheets: http://www.st.com/web/en/resource/technical/document/datasheet/CD00157556.pdf http://www.st.com/web/en/resource/technical/document/datasheet/CD00157558.pdf http://www.st.com/web/en/resource/technical/document/datasheet/CD00266638.pdf http://www.st.com/web/en/resource/technical/document/datasheet/CD00225278.pdf http://www.st.com/web/en/resource/technical/document/datasheet/DM00076709.pdf * JEDEC JC 42.4 compliant temperature sensor chips Datasheet: http://www.jedec.org/sites/default/files/docs/4_01_04R19.pdf Common for all chips: Prefix: 'jc42' Addresses scanned: I2C 0x18 - 0x1f h](h bullet_list)}(hhh](h list_item)}(hnAnalog Devices ADT7408 Datasheets: https://www.analog.com/static/imported-files/data_sheets/ADT7408.pdf h](h)}(hAnalog Devices ADT7408h]hAnalog Devices ADT7408}(hhhhhNhNubah}(h]h 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]h"]h$]h&]uh1hhhhK2hjubh)}(h;https://ww1.microchip.com/downloads/en/DeviceDoc/22327A.pdfh]j)}(hjh]h;https://ww1.microchip.com/downloads/en/DeviceDoc/22327A.pdf}(hjhhhNhNubah}(h]h ]h"]h$]h&]refurijuh1jhjubah}(h]h ]h"]h$]h&]uh1hhhhK4hjubeh}(h]h ]h"]h$]h&]uh1hhhhK*hj`ubeh}(h]h ]h"]h$]h&]uh1hhhubh)}(hXNXP Semiconductors SE97, SE97B, SE98, SE98A Datasheets: https://www.nxp.com/documents/data_sheet/SE97.pdf https://www.nxp.com/documents/data_sheet/SE97B.pdf https://www.nxp.com/documents/data_sheet/SE98.pdf https://www.nxp.com/documents/data_sheet/SE98A.pdf h](h)}(h+NXP Semiconductors SE97, SE97B, SE98, SE98Ah]h+NXP Semiconductors SE97, SE97B, SE98, SE98A}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK6hj ubh)}(h Datasheets:h]h Datasheets:}(hj2hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK8hj ubh)}(hhttps://www.nxp.com/documents/data_sheet/SE97.pdf https://www.nxp.com/documents/data_sheet/SE97B.pdf https://www.nxp.com/documents/data_sheet/SE98.pdf https://www.nxp.com/documents/data_sheet/SE98A.pdf 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http://www.st.com/web/en/resource/technical/document/datasheet/CD00225278.pdf http://www.st.com/web/en/resource/technical/document/datasheet/DM00076709.pdf h](h)}(hEST Microelectronics STTS424, STTS424E02, STTS2002, STTS2004, STTS3000h]hEST Microelectronics STTS424, STTS424E02, STTS2002, STTS2004, STTS3000}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKJhjubh)}(h Datasheets:h]h Datasheets:}(hj"hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKLhjubh)}(hXhttp://www.st.com/web/en/resource/technical/document/datasheet/CD00157556.pdf http://www.st.com/web/en/resource/technical/document/datasheet/CD00157558.pdf http://www.st.com/web/en/resource/technical/document/datasheet/CD00266638.pdf http://www.st.com/web/en/resource/technical/document/datasheet/CD00225278.pdf http://www.st.com/web/en/resource/technical/document/datasheet/DM00076709.pdf h](h)}(hMhttp://www.st.com/web/en/resource/technical/document/datasheet/CD00157556.pdfh]j)}(hj6h]hMhttp://www.st.com/web/en/resource/technical/document/datasheet/CD00157556.pdf}(hj8hhhNhNubah}(h]h ]h"]h$]h&]refurij6uh1jhj4ubah}(h]h ]h"]h$]h&]uh1hhhhKNhj0ubh)}(hMhttp://www.st.com/web/en/resource/technical/document/datasheet/CD00157558.pdfh]j)}(hjNh]hMhttp://www.st.com/web/en/resource/technical/document/datasheet/CD00157558.pdf}(hjPhhhNhNubah}(h]h ]h"]h$]h&]refurijNuh1jhjLubah}(h]h ]h"]h$]h&]uh1hhhhKPhj0ubh)}(hMhttp://www.st.com/web/en/resource/technical/document/datasheet/CD00266638.pdfh]j)}(hjfh]hMhttp://www.st.com/web/en/resource/technical/document/datasheet/CD00266638.pdf}(hjhhhhNhNubah}(h]h ]h"]h$]h&]refurijfuh1jhjdubah}(h]h ]h"]h$]h&]uh1hhhhKRhj0ubh)}(hMhttp://www.st.com/web/en/resource/technical/document/datasheet/CD00225278.pdfh]j)}(hj~h]hMhttp://www.st.com/web/en/resource/technical/document/datasheet/CD00225278.pdf}(hjhhhNhNubah}(h]h ]h"]h$]h&]refurij~uh1jhj|ubah}(h]h ]h"]h$]h&]uh1hhhhKThj0ubh)}(hMhttp://www.st.com/web/en/resource/technical/document/datasheet/DM00076709.pdfh]j)}(hjh]hMhttp://www.st.com/web/en/resource/technical/document/datasheet/DM00076709.pdf}(hjhhhNhNubah}(h]h ]h"]h$]h&]refurijuh1jhjubah}(h]h ]h"]h$]h&]uh1hhhhKVhj0ubeh}(h]h ]h"]h$]h&]uh1hhhhKNhjubeh}(h]h ]h"]h$]h&]uh1hhhubh)}(hJEDEC JC 42.4 compliant temperature sensor chips Datasheet: http://www.jedec.org/sites/default/files/docs/4_01_04R19.pdf h](h)}(h0JEDEC JC 42.4 compliant temperature sensor chipsh]h0JEDEC JC 42.4 compliant temperature sensor chips}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKXhjubh)}(h Datasheet:h]h Datasheet:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKZhjubh)}(h>http://www.jedec.org/sites/default/files/docs/4_01_04R19.pdf h]h)}(h h](hterm)}(hAuthor:h]hAuthor:}(hjOhhhNhNubah}(h]h ]h"]h$]h&]uh1jMhhhKghjIubh definition)}(hhh]h)}(h"Guenter Roeck h](hGuenter Roeck <}(hjbhhhNhNubj)}(hlinux@roeck-us.neth]hlinux@roeck-us.net}(hjjhhhNhNubah}(h]h ]h"]h$]h&]refurimailto:linux@roeck-us.netuh1jhjbubh>}(hjbhhhNhNubeh}(h]h ]h"]h$]h&]uh1hhhhKfhj_ubah}(h]h ]h"]h$]h&]uh1j]hjIubeh}(h]h ]h"]h$]h&]uh1jGhhhKghjDubah}(h]h ]h"]h$]h&]uh1jBhhhhhhhNubh)}(hhh](h)}(h Descriptionh]h Description}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhjhhhhhKjubh)}(hXThis driver implements support for JEDEC JC 42.4 compliant temperature sensors, which are used on many DDR3 memory modules for mobile devices and servers. Some systems use the sensor to prevent memory overheating by automatically throttling the memory controller.h]hXThis driver implements support for JEDEC JC 42.4 compliant temperature sensors, which are used on many DDR3 memory modules for mobile devices and servers. Some systems use the sensor to prevent memory overheating by automatically throttling the memory controller.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKlhjhhubh)}(hzThe driver auto-detects the chips listed above, but can be manually instantiated to support other JC 42.4 compliant chips.h]hzThe driver auto-detects the chips listed above, but can be manually instantiated to support other JC 42.4 compliant chips.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKqhjhhubh)}(h~Example: the following will load the driver for a generic JC 42.4 compliant temperature sensor at address 0x18 on I2C bus #1::h]h}Example: the following will load the driver for a generic JC 42.4 compliant temperature sensor at address 0x18 on I2C bus #1:}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKthjhhubh literal_block)}(hH# modprobe jc42 # echo jc42 0x18 > /sys/bus/i2c/devices/i2c-1/new_deviceh]hH# modprobe jc42 # echo jc42 0x18 > /sys/bus/i2c/devices/i2c-1/new_device}hjsbah}(h]h ]h"]h$]h&] xml:spacepreserveuh1jhhhKwhjhhubh)}(hA JC 42.4 compliant chip supports a single temperature sensor. Minimum, maximum, and critical temperature can be configured. There are alarms for high, low, and critical thresholds.h]hA JC 42.4 compliant chip supports a single temperature sensor. Minimum, maximum, and critical temperature can be configured. There are alarms for high, low, and critical thresholds.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKzhjhhubh)}(hXThere is also an hysteresis to control the thresholds for resetting alarms. Per JC 42.4 specification, the hysteresis threshold can be configured to 0, 1.5, 3.0, and 6.0 degrees C. Configured hysteresis values will be rounded to those limits. The chip supports only a single register to configure the hysteresis, which applies to all limits. This register can be written by writing into temp1_crit_hyst. Other hysteresis attributes are read-only.h]hXThere is also an hysteresis to control the thresholds for resetting alarms. Per JC 42.4 specification, the hysteresis threshold can be configured to 0, 1.5, 3.0, and 6.0 degrees C. Configured hysteresis values will be rounded to those limits. The chip supports only a single register to configure the hysteresis, which applies to all limits. This register can be written by writing into temp1_crit_hyst. Other hysteresis attributes are read-only.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhK~hjhhubh)}(hIf the BIOS has configured the sensor for automatic temperature management, it is likely that it has locked the registers, i.e., that the temperature limits cannot be changed.h]hIf the BIOS has configured the sensor for automatic temperature management, it is likely that it has locked the registers, i.e., that the temperature limits cannot be changed.}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjhhubeh}(h] descriptionah ]h"] descriptionah$]h&]uh1hhhhhhhhKjubh)}(hhh](h)}(h Sysfs entriesh]h Sysfs entries}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhjhhhhhKubhtable)}(hhh]htgroup)}(hhh](hcolspec)}(hhh]h}(h]h ]h"]h$]h&]colwidthKuh1j0hj-ubj1)}(hhh]h}(h]h ]h"]h$]h&]colwidthK+uh1j0hj-ubhtbody)}(hhh](hrow)}(hhh](hentry)}(hhh]h)}(h temp1_inputh]h temp1_input}(hjUhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjRubah}(h]h ]h"]h$]h&]uh1jPhjMubjQ)}(hhh]h)}(hTemperature (RO)h]hTemperature (RO)}(hjlhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjiubah}(h]h ]h"]h$]h&]uh1jPhjMubeh}(h]h ]h"]h$]h&]uh1jKhjHubjL)}(hhh](jQ)}(hhh]h)}(h temp1_minh]h temp1_min}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubjQ)}(hhh]h)}(hMinimum temperature (RO or RW)h]hMinimum temperature (RO or RW)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubeh}(h]h ]h"]h$]h&]uh1jKhjHubjL)}(hhh](jQ)}(hhh]h)}(h temp1_maxh]h temp1_max}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubjQ)}(hhh]h)}(hMaximum temperature (RO or RW)h]hMaximum temperature (RO or RW)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubeh}(h]h ]h"]h$]h&]uh1jKhjHubjL)}(hhh](jQ)}(hhh]h)}(h temp1_crith]h temp1_crit}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubjQ)}(hhh]h)}(h$Critical high temperature (RO or RW)h]h$Critical high temperature (RO or RW)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubeh}(h]h ]h"]h$]h&]uh1jKhjHubjL)}(hhh](jQ)}(hhh]h)}(htemp1_crit_hysth]htemp1_crit_hyst}(hj1hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj.ubah}(h]h ]h"]h$]h&]uh1jPhj+ubjQ)}(hhh]h)}(h*Critical hysteresis temperature (RO or RW)h]h*Critical hysteresis temperature (RO or RW)}(hjHhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjEubah}(h]h ]h"]h$]h&]uh1jPhj+ubeh}(h]h ]h"]h$]h&]uh1jKhjHubjL)}(hhh](jQ)}(hhh]h)}(htemp1_max_hysth]htemp1_max_hyst}(hjhhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjeubah}(h]h ]h"]h$]h&]uh1jPhjbubjQ)}(hhh]h)}(h#Maximum hysteresis temperature (RO)h]h#Maximum hysteresis temperature (RO)}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj|ubah}(h]h ]h"]h$]h&]uh1jPhjbubeh}(h]h ]h"]h$]h&]uh1jKhjHubjL)}(hhh](jQ)}(hhh]h)}(htemp1_min_alarmh]htemp1_min_alarm}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubjQ)}(hhh]h)}(hTemperature low alarmh]hTemperature low alarm}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubeh}(h]h ]h"]h$]h&]uh1jKhjHubjL)}(hhh](jQ)}(hhh]h)}(htemp1_max_alarmh]htemp1_max_alarm}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubjQ)}(hhh]h)}(hTemperature high alarmh]hTemperature high alarm}(hjhhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhjubah}(h]h ]h"]h$]h&]uh1jPhjubeh}(h]h ]h"]h$]h&]uh1jKhjHubjL)}(hhh](jQ)}(hhh]h)}(htemp1_crit_alarmh]htemp1_crit_alarm}(hj hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj ubah}(h]h ]h"]h$]h&]uh1jPhjubjQ)}(hhh]h)}(hTemperature critical alarmh]hTemperature critical alarm}(hj$hhhNhNubah}(h]h ]h"]h$]h&]uh1hhhhKhj!ubah}(h]h ]h"]h$]h&]uh1jPhjubeh}(h]h ]h"]h$]h&]uh1jKhjHubeh}(h]h ]h"]h$]h&]uh1jFhj-ubeh}(h]h ]h"]h$]h&]colsKuh1j+hj(ubah}(h]h ]h"]h$]h&]uh1j&hjhhhhhNubeh}(h] sysfs-entriesah ]h"] sysfs entriesah$]h&]uh1hhhhhhhhKubeh}(h]kernel-driver-jc42ah ]h"]kernel driver jc42ah$]h&]uh1hhhhhhhhKubeh}(h]h ]h"]h$]h&]sourcehuh1hcurrent_sourceN current_lineNsettingsdocutils.frontendValues)}(hN generatorN datestampN source_linkN source_urlN 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