| 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. |
