projects / deliverable / linux.git / blame
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|---|---|---|
| 5510e62a XX |
1 | Kernel driver MCP3021 |
| 2 | ====================== | |
| 3 | ||
| 4 | Supported chips: | |
| 5 | * Microchip Technology MCP3021 | |
| 6 | Prefix: 'mcp3021' | |
| 7 | Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21805a.pdf | |
| 592758b1 SS |
8 | * Microchip Technology MCP3221 |
| 9 | Prefix: 'mcp3221' | |
| 10 | Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/21732c.pdf | |
| 5510e62a | 11 | |
| 592758b1 SS |
12 | Authors: |
| 13 | Mingkai Hu | |
| 14 | Sven Schuchmann <schuchmann@schleissheimer.de> | |
| 5510e62a XX |
15 | |
| 16 | Description | |
| 17 | ----------- | |
| 18 | ||
| 592758b1 SS |
19 | This driver implements support for the Microchip Technology MCP3021 and |
| 20 | MCP3221 chip. | |
| 5510e62a XX |
21 | |
| 22 | The Microchip Technology Inc. MCP3021 is a successive approximation A/D | |
| 592758b1 SS |
23 | converter (ADC) with 10-bit resolution. The MCP3221 has 12-bit resolution. |
| 24 | ||
| 25 | These devices provide one single-ended input with very low power consumption. | |
| 26 | Communication to the MCP3021/MCP3221 is performed using a 2-wire I2C | |
| 27 | compatible interface. Standard (100 kHz) and Fast (400 kHz) I2C modes are | |
| 28 | available. The default I2C device address is 0x4d (contact the Microchip | |
| 29 | factory for additional address options). |