NXP Semiconductors

13

80310

5.6

State machine

The following diagram describes the state machine of the TC80310:

Figure 9. LIN wake-up state machine

5.6.1

Standby

The 80310 is in standby mode, if there is a LIN timeout and in absence of alternator rotation (no phase), or in case of power and reset

(POR), or with a LIN MID3C command if nvm_lin_special is set

• There is no excitation.

• The duty cycle (DC) is equal to zero.

The device needs a small amount of quiescent current to feed some functions such as oscillator. LIN timeout means:

• No activity on the LIN bus during a specified time

• or on a LIN watchdog timeout during a specified time

Standby

No edge on Phase but

Edge on LIN

(High Phase1 appears) or

(100%DC during 8 cycles =>

Phase Regulation set OFF)

-

POR

-

LIN Timeout with no Phase

-

LIN MID3C if nvm_lin_special

Wake-up

on LIN

LIN Command with Vreg <> 10.6V:

-

MID 29 if nvm_ALT1

-

MID2A if nvm_ALT2

-

MID2B if nvm_lin_special

REGULATION w LRC

PRE-EXC

No High Phase1 in the

previous cycle and Phase

Regulation is ON

Phase

REGULATION

REGULATION w/o LRC

No High Phase1 in the

previous cycle and Phase

Regulation is ON

(High Phase 1 appears) or

(100%DC during 8 cycles =>

Phase Regulation set OFF)

Phase > Start

Phase < Stop

Phase > LRC

and first Vreg reached with LRC

Phase < LRC

Phase < Stop

Edge on Phase

Wake-up

on Phase

See cont. in

Self-Start State

Machine

Phase

REGULATION

- LIN = 10.6V with no Phase

- LIN = 10.6V whatever the Phase if

nvm_106V_ref_off

Regulation

Phase

Regulation

Phase