The input levels of the device will vary dependent on the mode and voltage of the device. The input voltage thresholds when in Sleep or Idle mode are dependent on the VCC level as shown in Figure 1. When in Sleep or Idle mode the TTLenable bit has no effect.
The active input levels of the ECC608-TNGHNT are fixed and do not vary with the VCC level. The input levels transmitted to the device must comply with the table below.
| Parameter | Sym. | Min. | Typ. | Max. | Units | Conditions |
|---|---|---|---|---|---|---|
| Input Low Voltage | VIL | -0.5 | — | 0.5 | V | When device is active and TTLenable bit in Configuration memory is zero; otherwise, see above. |
| Input High Voltage | VIH | 1.5 | — | VCC + 0.5 | V | When device is active and TTLenable bit in Configuration memory is zero; otherwise, see above. |
Figure 1. VIH and VIL in Sleep and Idle Mode
