From 5f3330bea83dc6aae2e2ae301bc1cf12491c5cd6 Mon Sep 17 00:00:00 2001 From: Philip Edelbrock Date: Sun, 7 Feb 1999 02:10:33 +0000 Subject: [PATCH] (Phil) Added documenation for the Linear Technology LTC1710. git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@200 7894878c-1315-0410-8ee3-d5d059ff63e0 --- doc/chips/ltc1710 | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 doc/chips/ltc1710 diff --git a/doc/chips/ltc1710 b/doc/chips/ltc1710 new file mode 100644 index 00000000..8397662c --- /dev/null +++ b/doc/chips/ltc1710 @@ -0,0 +1,31 @@ +This is some documenation for the ltc1710 driver for the Linear +Technologies LTC1710. + +The LTC1710 is a simple dual switch device with a SMBus interface. It can +switch a supply voltage to either of its two output pins independantly +from the built-in SMBus interface. + +For each sensed LTC1710 there is a directory which looks something like: +ltc1710-i2c-1-59 + +For each directory there are the following files: + +* switch1 (LTC1710_SYSCTL_SWITCH_1) + Simply contains either a 1 or 0 depending on whether the switch is + currently turned on or off. +* switch2 (LTC1710_SYSCTL_SWITCH_2) + Works the same way as switch1, but is for the second switch. + +Some notes: The LTC1710 is a *very* simple I2C/SMBus device. It does not +support reads, so the status of the switches isn't polled, but rather +remembered. The LTC1710 has enough 'umph' to drive 300mA with only 0.4 Ohm +impedence (in an 'on' state). This works well for LEDs, or to drive other +devices (MOSFETs and such) which can multiply the switching effect. The +LTC1710 also contains an emergency over-temperature shut-off in the case +of too much current flow. Switch 2 switches the Vcc voltage on/off, but +Switch 1 switches the voltage present on pin 1 (0V to Vcc). + +This driver was written and maintained by Philip Edelbrock +. Please send comments/suggestions/corrections to him. +For more technical information on the LTC1710, please get the Acrobat PDF +from http://www.linear-tech.com/