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CSG14K_CSG8K

Functional Description

Datasheet

• PUBLIC

DS000571

• v1-00 • 2020-Dec-15

112

│ 33

7.2.5

Soft Reset

Figure 30:

Soft Reset Register

Reg.Name

Addr

Bits

Description

CMD_REGS.CMD_RST_SOFT_N

[0]

0: Soft-reset active (brings the sensor in soft-reset state)

1: Soft-reset inactive

The sensor has an asynchronous reset input pin (RST_N) and an asynchronous reset register

(CMD_RST_SOFT_N). Both are active-low.

When combined, they have the following function:

●

RST_N: Reset the entire sensor when low. This is considered a hard reset.

●

CMD_RST_SOFT_N: Reset the entire sensor, except the SPI interface and register bank when

low. This is considered a soft reset.

As long as RST_N is high, all registers retain their value when CMD_RST_SOFT_N is low.

The procedures to assert and release soft reset are described in detail in section 7.4.3.

7.2.6

Controlling Exposure and Readout

This section explains the different ways the exposure of a frame can be started and ended. First some

important concepts of the frame timing model are explained.

Basic Frame Timing

During operation, the sensor can be in any of the following states:

●

RESET: Asynchronous sensor reset is low, disabling the sensor entirely

●

IDLE: Sensor is not doing anything while waiting for external requests

●

EXPOSURE: Light is being integrated in the pixels

●

GLOB: Closing global shutter by sampling all integrated pixel values

●

READOUT: Reading out the acquired frame plus meta data and mandatory overhead

A distinction can be made between two basic frame timing operations (sequential and pipelined

operation), as detailed in the following two sections.

Sequential Operation

In sequential operation, the sensor goes through a sequential succession of EXPOSURE - GLOB -

READOUT to grab a single image, as indicated in the figure below. When a cycle like this has been

completed, the sensor is again in an IDLE state, waiting for new commands.

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