STMIPID02 datasheet(14/50 Pages) STMICROELECTRONICS

14 / 50 page

8.4

Sensor switching mechanism

The flow chart below explains the sensor switching mechanism. If one sensor is streaming and the other is not we

are in state1. If both sensors are not streaming, we are in state2.

It is forbidden that both sensors stream simultaneously while switching. To switch sensors, it is obligatory to be in

state1 or state2 .

Figure 9. Sensor switching mechanism

Stop streaming sensor 1

Reset STMIPID02 with

Program STMIPID02

hard reset

according sensor 2 if needed

Program sensor 2

and start streaming

= State 1

= State 2

Sensor 1 streaming

Sensor 2 stopped

8.5

Error signal

Below is an accumulated status of all errors found in the chip.

Status of all errors from all D-PHY’s

Checksum and ECC failures of CSI reception

ccp_shift_sync, ccp_false_sync and ccp_crc_error of CCP reception

The individual status of an error can be checked on the respective I2C register bit. The status can be cleared by

programming Mode_reg2[6] register.

8.6

INT signal

This is a status showing reception of a short packet in the CSI stream. The user needs to clear the status by

programming Clock_control_reg1[5] to observe the next short packet. If the user does not clear this bit then he

may miss the transition on the INT ball when the next short packet is observed. The application of short packet

interrupts is not envisioned yet.

STMIPID02

Sensor switching mechanism

DS12803 - Rev 1

page 14/50

STMIPID02 Datasheet(PDF) 14 Page - STMicroelectronics