ZHCSH19F November 2017 – November 2023 TCAN1043-Q1 , TCAN1043G-Q1 , TCAN1043H-Q1 , TCAN1043HG-Q1
PRODUCTION DATA
The following device status indicator flags are implemented to allow for the MCU to determine the status of the device and the system. In addition to faults, the nFAULT terminal also signals wake up requests and a cold power-up sequence on the VSUP battery terminal so the system can do any diagnostics or cold booting sequence necessary. The RXD terminal indicates wake up request and the faults are multiplexed (ORed) to the nFAULT output.
| EVENT | FLAG NAME | CAUSE | INDICATORS(1) | FLAG IS CLEARED | COMMENT |
|---|---|---|---|---|---|
| Power-up | PWRON | Power up on VSUP and any return of VSUP after it has been below UVVSUP | nFAULT = L upon entering Silent mode from Standby, Go-to-Sleep, or Sleep mode | After transition to normal mode | |
| Wake-up Request | WAKERQ(2) | Wake up event on CAN bus, state transition on WAKE pin, or initial power up | nFAULT = RXD = L after wake up in standby mode, go-to-sleep mode, and sleep mode | After transition to normal mode, or either a UVVCC or UVVIO event | Wake up request can only be set from standby, Go-to-sleep, or sleep mode. Resets timers for UVVCC or UVVIO |
| Wake-up Source Recognition(3) | WAKESR | Wake up event on CAN bus, state transition on WAKE pin, initial power up | Available upon entering normal mode(4) , nFAULT = L indicates wake from WAKE terminal, nFAULT = H indicates wake from CAN bus | After four recessive to dominant edges on TXD in normal mode,leaving normal mode, or either a UVVCC or UVVIO event | A LWU source flag is set on initial power up |
| Under voltage | UVVCC | Under voltage VCC | Not externally indicated | VCC returns, or Wake-up request occurs | |
| UVVIO | Under voltage VIO | Not externally indicated | VIO returns, or Wake-up request occurs | ||
| UVVSUP | Under voltage VSUP | Not externally indicated | VSUP returns | VSUP undervoltage event triggers the PWRON and WAKERQ flags upon return of VSUP | |
| CAN Bus Failures | CBF | CANH shorted to GND, VCC, VSUP or CANL shorted to GND, VCC, VSUP | nFAULT = L in Normal mode only(5) | Upon leaving Normal mode, or if no CAN bus fault is detected for four consecutive dominant to recessive transitions of the TXD pin while in normal mode. | Failure must persist for four consecutive dominant to recessive transitions |
| Local Faults | TXDDTO | TXD Dominant Time Out, dominant (low) signal for t ≥ tTXD_DTO | nFAULT = L upon entering Silent mode from Normal mode | RXD = L and TXD = H, or upon transitioning into Normal, Standby, Go-to-Sleep, or Sleep modes | CAN driver remains disabled until the TXDDTO is cleared |
| TXDRXD | TXD and RXD pins are shorted together for t ≥ tTXD_DTO | CAN driver remains disabled until the TXDRXD is cleared | |||
| CANDOM | CAN bus dominant fault, when dominant bus signal received for t ≥ tBUS_DOM | RXD = H, or upon transitioning into Normal, Standby, Go-to-Sleep, or Sleep modes | Driver remains enabled | ||
| TSD | Thermal Shutdown, junction temperature ≥ TTSD | TJ drops below tTSD and either RXD = L and TXD = H, or upon transitioning into Normal, Standby, Go-to-Sleep, or Sleep modes | CAN driver remains disabled until the TSD is cleared |