⚙️ State Machines and Operational Modes

1. ADBMS6830B Core State Transitions

This table outlines how the core functionality of the ADBMS6830B transitions between its power and measurement states.

From State	To State	Condition / Command	Explanation
SLEEP	STANDBY	\(\text{WAKE-UP SIGNAL}\) (\(\text{t}_{\text{WAKE}}\)) or \(\text{POWER-UP}\)	The host controller sends a wake-up signal via \(\text{isoSPI}\), or the chip is initially powered on.
STANDBY	REFUP	\(\text{REFON} = 1\)	The host issues a command to turn the Internal Reference ON.
REFUP	STANDBY	\(\text{WD TIMEOUT}\) AND \(\text{DCTO} = 0\)	The watchdog timer expires and \(\text{DCTO}\) is zero (no active communication).
REFUP	MEASURE	\(\text{ADC COMMAND}\) (\(\text{t}_{\text{REFUP}}\))	Once the reference is stable, an \(\text{ADC}\) measurement command is received.
MEASURE	REFUP	\(\text{CONVERSION DONE}\) (\(\text{REFON} = 1\), \(\text{CONT} = 0\))	A single-shot conversion is finished, but the reference remains active.
MEASURE	STANDBY	\(\text{CONVERSION DONE}\) (\(\text{REFON} = 0\), \(\text{CONT} = 0\))	A single-shot conversion is finished, and the \(\text{REFON}\) bit is cleared, powering down the reference.
MEASURE	MEASURE	\(\text{CONT} = 1\)	The chip is configured for Continuous measurement, starting the next conversion cycle immediately.
STANDBY	DTM MEASURE	\(\text{VALID COMMAND}\)	A specific command initiates a Diagnostic or Test Mode measurement.
STANDBY	EXTENDED BALANCING	\(\text{VALID COMMAND}\)	A command is received to enter the long-duration cell balancing mode.
EXTENDED BALANCING	STANDBY	\(\text{DCTO reaches 0}\) or \(\text{WD TIMEOUT}\) and \(\text{DCTO} \neq 0\)	Balancing time is finished, or a watchdog/communication event forces a return to standby.
Any State	SLEEP	\(\text{SRST}\) (\(\text{Soft Reset}\)) or \(\text{WD TIMEOUT}\) AND \(\text{DCTO} = 0\) (\(\text{t}_{\text{SLEEP}}\))	The device is commanded to reset/sleep or enters sleep after a watchdog time-out.

2. ADBMS6830B isoSPI Communication State Transitions

This table outlines how the isolated serial communication interface manages its power states.

State	Description	Transition Condition (Entering)	Transition Condition (Exiting)	Power/Activity
IDLE	Lowest power state for the isoSPI ports.	Automatically entered if no activity is detected.	Receiving a WAKE-UP SIGNAL.	Ports are powered down.
READY	Ports are powered up and ready to send or receive data.	Upon receiving a WAKE-UP SIGNAL.	IDLE TIMEOUT (\(\text{t}_{\text{IDLE}}\)) if no activity occurs for a specific duration.	Ports are powered up and consuming standby current.
ACTIVE	Ports are currently transmitting or receiving an \(\text{isoSPI}\) pulse sequence.	A TRANSMIT/RECEIVE event (data communication) occurs.	Communication ceases (returns to READY).	Ports consume maximum power; current draw scales with clock frequency.