7.4 Worst-Case Response Time (ms)
The worst-case response time is calculated when the sensor is touched after its measurement, as shown in Figure 7-4. The response times obtained are provided in the following tables.
When one sensor is touched:
| Measurement period (ms) | Response Time | |||
|---|---|---|---|---|
|
CFG1 x8 Oversampling |
CFG1 x16 Oversampling |
CFG1 x32 Oversampling |
CFG1 x64 Oversampling | |
| Free-run | 9 | 17 | 34 | 67 |
| 50 | 104 | 109 | 117 | 134 |
| 100 | 204 | 209 | 217 | 234 |
| 250 | 504 | 509 | 517 | 534 |
When two sensors are touched:
| Measurement period (ms) | Response Time | |||
|---|---|---|---|---|
|
CFG1 x8 Oversampling |
CFG1 x16 Oversampling |
CFG1 x32 Oversampling |
CFG1 x64 Oversampling | |
| Free-run | 11 | 22 | 42 | 84 |
| 50 | 106 | 113 | 125 | 150 |
| 100 | 206 | 213 | 225 | 250 |
| 250 | 506 | 513 | 525 | 550 |
When three sensors are touched:
| Measurement Period (ms) | Response Time | |||
|---|---|---|---|---|
|
CFG1 x8 Oversampling |
CFG1 x16 Oversampling |
CFG1 x32 Oversampling |
CFG1 x64 Oversampling | |
| Free-run | 13 | 26 | 51 | 101 |
| 50 | 109 | 117 | 134 | 167 |
| 100 | 209 | 217 | 234 | 267 |
| 250 | 509 | 517 | 534 | 567 |
The minimum and maximum values are calculated using the best- and worst-case response time formulas, respectively. These values are calculated for a condition when all three buttons are enabled and a single button is touched.
| Worst case repsonse time (Max) | (2 x Measurement period) + (1 x Measurement time x Total number of sensors enabled) + (3 x Measurement time x Total number of sensors touched) |
| Best case response time (Min) | (1 x Measurement period) + (1 x Measurement time x Total number of sensors enabled) + (3 x Measurement time x Total number of sensors touched) |
| Measurement Time | Min./Avg./Max. Resulting Response Time (ms) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CFG1 x8 Oversampling | CFG1 x16 Oversampling | CFG1 x32 Oversampling | CFG1 x64 Oversampling | |||||||||
| Min. | Avg. | Max. | Min. | Avg. | Max. | Min. | Avg. | Max. | Min. | Avg. | Max. | |
| Free-run | 9 | 17 | 34 | 67 | ||||||||
| 50 | 54 | 79 | 104 | 59 | 84 | 109 | 67 | 92 | 117 | 84 | 109 | 134 |
| 100 | 104 | 154 | 204 | 109 | 159 | 209 | 117 | 167 | 217 | 134 | 184 | 234 |
| 250 | 254 | 379 | 504 | 259 | 383 | 509 | 267 | 392 | 517 | 284 | 409 | 534 |
