L9679P datasheet(174/279 Pages) STMICROELECTRONICS

Part #	L9679P

Description	Automotive advanced airbag for mid/high end applications and cut-off battery IC

PDF	279 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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174 / 279 page

Remote sensor interface

L9679P

174/279

DS11627 Rev 7

Figure 41. Remote sensor synchronization pulses

L9679P supports three time slots in a sync period with associated RSDRx registers. The

messages received within one sync period are routed to the corresponding RSDRx register

associated to each time slot. A time slot control is performed to check if the incoming

messages fall within the valid time slots reported in Table 63 and sketched in Figure 42.

If the end of the received message occurs after the end of the checked outside a valid time

slot, a SLOT_ERROR fault will be detected and stored in the related RSDRx register. Slot

error assignment is described in Figure 42. For instance, if the end of second message falls

before the expected valid time window the error slot 1 is asserted and then also the data

received with the first message is lost. If two messages end within the same slot, the second

message will be assigned to that slot, regardless of its validity. The time slot control can be

disabled by setting the TSxDIS bit in the RSCRx register.

SATSYNC

SATFD1

SATFD2

SATFD3

SATFD4

GAPGPS02284

L9679P Datasheet(PDF) 174 Page - STMicroelectronics