Table of I2C Usage: VM2 family
This table shows how I2C addresses are assigned for use with the VM2 controller product family. You don’t have to keep to these assignments, but it will likely make your application more extensible and future proof if you do. We will try to keep to these assignments in our standard hardware designs.
Please contact us if you are in doubt about which addresses to use in your hardware design.
The I2C address are given in two formats:
- Standard: 7 bit binary as used in I2C device datasheets.
- Venom: I2CBus addresses as used in Venom, in the range 0-255 (decimal).
| I2C Address | Allocation | ||
|---|---|---|---|
| Standard Address |
Venom Address |
On I2C Bus 1 | On I2C Bus 2 |
| 0-24 | – | – | |
| 0001 100 | 24 | AD5339** (12-bit DAC) | AD5339** |
| 0001 101 | 26 | AD5339 | AD5339 |
| 28-62 | – | – | |
| 0100 000 | 64 | PCF8574: Dig. 128-135; AD7998** (12-bit ADC) | PCF8574: Dig. 384-391; AD7998** |
| 0100 001 | 66 | PCF8574: Dig. 136-143; AD7998 | PCF8574: Dig. 392-399; AD7998 |
| 0100 010 | 68 | PCF8574: Dig. 144-151; AD7998 | PCF8574: Dig. 400-407; AD7998 |
| 0100 011 | 70 | PCF8574: Dig. 152-159 | PCF8574: Dig. 408-415 |
| 0100 100 | 72 | PCF8574: Dig. 160-167 | PCF8574: Dig. 416-423 |
| 0100 101 | 74 | PCF8574: Dig. 168-175 | PCF8574: Dig. 424-431 |
| 0100 110 | 76 | PCF8574: Dig. 176-183 | PCF8574: Dig. 432-439 |
| 0100 111 | 78 | PCF8574: Dig. 184-191 | PCF8574: Dig. 440-447 |
| 80-110 | – | – | |
| 0111 000 | 112 | PCF8574A: Dig. 192-199 * | PCF8574A: Dig. 448-455 |
| 0111 001 | 114 | PCF8574A: Dig. 200-207 * | PCF8574A: Dig. 456-463 |
| 0111 010 | 116 | PCF8574A: Dig. 208-215 * | PCF8574A: Dig. 464-471 |
| 0111 011 | 118 | PCF8574A: Dig. 216-223 * | PCF8574A: Dig. 472-479 |
| 0111 100 | 120 | PCF8574A: Dig. 224-231 * | PCF8574A: Dig. 480-487 |
| 0111 101 | 122 | PCF8574A: Dig. 232-239 * | PCF8574A: Dig. 488-495 |
| 0111 110 | 124 | PCF8574A: Dig. 240-247; Removable SD Card | PCF8574A: Dig. 496-503 |
| 0111 111 | 126 | PCF8574A: Dig. 248-255; 4×4 Matrix Keypad | PCF8574A: Dig. 504-511 |
| 1000 000- 1000 100 |
128-136 | PCF8591 (8-bit analogue) | PCF8591 |
| 138-142 | – | – | |
| 1001 000 | 144 | TSC2003 Touchscreen IC | – |
| 146-158 | – | – | |
| 1010 000 | 160 | – | – |
| 1010 001 | 162 | General purpose EEPROM | – |
| 1010 010 | 164 | Ethernet EEPROM | – |
| 166-206 | – | – | |
| 1101 000 | 208 | MCP3421** (18-bit ADC) | MCP3421** |
| 210-240 | – | – | |
* In future designs using digital I/O channels, VCS will use these channels in descending order.
** These are the default address of the devices fitted to the 5624 18/12-bit Analogue I/O Port.
Entries in Italics are addresses used on some of our Standard Application Boards and Display Adapters.
The Industrial I/O cards use I2C addresses selectable within the PCF8574 and PCF8574A address range.