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Diffstat (limited to 'drivers/staging/iio/Documentation/dac/max517')
| -rw-r--r-- | drivers/staging/iio/Documentation/dac/max517 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/staging/iio/Documentation/dac/max517 b/drivers/staging/iio/Documentation/dac/max517 new file mode 100644 index 000000000000..e60ec2f91a7a --- /dev/null +++ b/drivers/staging/iio/Documentation/dac/max517 @@ -0,0 +1,41 @@ +Kernel driver max517 +==================== + +Supported chips: + * Maxim MAX517, MAX518, MAX519 + Prefix: 'max517' + Datasheet: Publicly available at the Maxim website + http://www.maxim-ic.com/ + +Author: + Roland Stigge <stigge@antcom.de> + +Description +----------- + +The Maxim MAX517/518/519 is an 8-bit DAC on the I2C bus. The following table +shows the different feature sets of the variants MAX517, MAX518 and MAX519: + +Feature MAX517 MAX518 MAX519 +-------------------------------------------------------------------------- +One output channel X +Two output channels X X +Simultaneous output updates X X +Supply voltage as reference X +Separate reference input X +Reference input for each DAC X + +Via the iio sysfs interface, there are three attributes available: out1_raw, +out2_raw and out12_raw. With out1_raw and out2_raw, the current output values +(0..255) of the DACs can be written to the device. out12_raw can be used to set +both output channel values simultaneously. + +With MAX517, only out1_raw is available. + +Via out1_scale (and where appropriate, out2_scale), the current scaling factor +in mV can be read. + +When the operating system goes to a power down state, the Power Down function +of the chip is activated, reducing the supply current to 4uA. + +On power-up, the device is in 0V-output state. |