5 Device Operating Modes
(Submit Feedback)Initialization
The device mode control unit of the ATA6847 implements six different modes (see Device Operating Modes):
- MCU Reset
- Normal
- Power Off
- Standby
- Deep Sleep
- Sleep
- a: VVS ≥ VVS_PWRON (4.2V...4.55V)
- b: VVS < VVS_PWROFF (2.8V...3V)
- c: DOPM = Normal
- e: Wake-up/interrupt event
- f: DOPM = Standby
- g: DOPM = Sleep
- h: No wake-up and interupt event pending
- j: Illegal DOPM code configuration via SPI
- k: Number of enabled wake-up sources ≥ 1
- l:
- ATA6847-5050: Reset pulse time expired & NRES not driven low externally & ((RSTLVL = 0 & VVDD1 > VVDD1_UV_IO_Clear) ‖ (RSTLVL = 1 & VVDD1 > VVDD1_UV_Clear ))
- ATA6847-3333: Reset pulse time expired & NRES not driven low externally & VVDD1 > VVDD1_UV_IO_Clear
- ATA6847-5033: Reset pulse time expired & NRES not driven low externally & VVDD2 > VVDD2_UV_IO_Clear
- m:
- ATA6847/ATA6847L: Watchdog activated & any Reset event
- ATA6847-5050: ( VVDD1 < VVDD1_UV_Set & RSTLVL = 1 ) ‖ VVDD1 < VVDD1_UV_IO_Set
- ATA6847-3333: VVDD1 < VVDD1_UV_IO_Set
- ATA6847-5033: VVDD2 < VVDD2_UV_IO_Set
- ATA6847/ATA6847L: NRES pulled low externally
- n: VDDIOOVSD = 1 & VDDIO overvoltage has been detected
- p: DOPM = Deep Sleep
- q: Local wake-up has been detected
- r: Local wake-up enabled
- C1 = f ‖ j ‖ g & (!h ‖ !k )
- C2 = g & h & k
- C3 = (g ‖ p & r ) & h & k
- C4 = p & r
Note:
- Mode switching triggered by condition a or q will not activate the LH pin.
- If DOPM = Normal mode and the CSCR [CSA1/2/3EN] bits are set, then CSA1/2/3 are enabled.
- LIN communication is available only if DOPM = Normal and LIN Operation Mode (LOPM) is activated (default: LIN is in Standby mode).
- A watchdog failure event has been detected. (Watchdog time-out in Sleep mode will not activate LH.)
- The device enters MCU Reset mode due to a VDDx undervoltage event.
- VDDx undervoltage has been detected for longer than tReset after entering MCU Reset mode, triggered by (e).