ZHCSPU9 February 2024 TCAN1465-Q1 , TCAN1469-Q1
ADVANCE INFORMATION
If UVSUP decreases to below UVSUPF, the device is in standby mode for any case except for when the device is in sleep mode. When in sleep mode, a UVSUP event does not cause the device to transition to standby mode. A UVSUP event causes the INH pin to turn off. When VSUP is greater than UVSUP, INH turns on and the SWE timer starts if enabled. If VSUP decreases below VSUP(PU)F, the TCAN146x-Q1 shuts everything down as the POR level has been reached. When VSUP returns, the device comes up as an initial power on. All registers are cleared and the device has to be reconfigured. If an under-voltage event takes place on the VCC pin, the device starts tUVSLP timer to determine if this is a real event. If after the timer times out, the device enters fail-safe or sleep mode depending upon device set up. See Figure 8-24. The TCAN146x-Q1 also provides voltage over protection on the VCC input. Once detected, the device enters fail-safe or sleep mode depending upon device set up. See Table 8-8 for the relationship between VSUP and VCC.
VSUP | VCC | DEVICE STATE | BUS | RXD |
---|---|---|---|---|
> UVSUP | > UVCC | Normal | Per TXD | Mirrors Bus |
> UVSUP | < UVCC | Fail-safe or Sleep | High Impedance | High (Recessive) |
< UVSUP | NA | Power off | High Impedance | High Impedance |