STV0974 datasheet(34/69 Pages) STMICROELECTRONICS

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STV0974

Functional description

4.9

Camera control unit

4.9.1

Features

● User mode transition

● I

2C register map including high-level registers and low-level registers dedicated to scaler

control

4.9.2

Description

the “1” transition is automatic

ii. Flash mode requires a firmware patch. Contact ST support.

iii. Flash mode is not available with the microprocessor interface

Modes

Power down ●Supply is internally cut.

Reset. Transitional state

Boot ●

Sleep mode This mode ensures that the coprocessor consumes the lowest possible power and I2C

control is possible. Patching should occur in sleep mode followed by setting the system clock

parameters.

Idle Mode The clock coming from the sensor is active and I2C control is possible.

Viewfinder Mode The viewfinder mode can be used to display dithered images on low color depth

local LCD displays. The programmable gamma allows for a wide range of displays. Different image

sizes and data formats can be chosen.

Figure 21: State machine user mode transitions

PDN: Power Down pin

Idle

Sleep

Idle

Sleep

Viewfinder

Live

Idle

Sleep

Idle

Viewfinder

Live

Capture

Viewfinder

Capture

Boot

Power down

Viewfinder

Sleep

PDN

Capture

Idle

Flash

Reset

VDD

STV0974 Datasheet(PDF) 34 Page - STMicroelectronics

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