Datasheet
Table Of Contents
- applications
- features
- key specifications
- table of contents
- list of figures
- list of tables
- 1 signal descriptions
- 2 system level description
- 3 block level description
- 4 image sensor core digital functions
- 4.1 mirror and flip
- 4.2 image windowing
- 4.3 test pattern
- 4.4 50/60Hz detection
- 4.5 AEC and AGC algorithms
- 4.6 AEC/AGC steps
- 4.7 black level calibration (BLC)
- 4.8 strobe flash and frame exposure
- 4.9 xenon flash control
- 4.10 frame exposure (FREX) mode
- 4.11 FREX strobe flash control
- 4.12 one-time programmable (OTP) memory
- 5 image sensor processor digital functions
- 6 image sensor output interface digital functions
- 7 register tables
- table 7-1 system control registers (sheet 1 of 5)
- table 7-2 SCCB registers (sheet 1 of 2)
- table 7-3 group hold control registers
- table 7-4 AEC/AGC 1 registers
- table 7-5 system timing registers (sheet 1 of 3)
- table 7-6 AEC/AGC 2 registers (sheet 1 of 3)
- table 7-7 STROBE/frame exposure control registers (sheet 1 of 2)
- table 7-8 50/60 HZ DETECTION registers
- table 7-9 OTP control registers (sheet 1 of 2)
- table 7-10 BLC registers (sheet 1 of 3)
- table 7-11 frame control registers
- table 7-12 DVP registers (sheet 1 of 2)
- table 7-13 MIPI top registers (sheet 1 of 11)
- table 7-14 ISPFC registers
- table 7-15 ISP TOP control registers (sheet 1 of 6)
- table 7-16 AWB registers (sheet 1 of 3)
- table 7-17 average registers (sheet 1 of 2)
- table 7-18 DPC registers
- table 7-19 LENC registers (sheet 1 of 4)
- table 7-20 cluster DPC registers (sheet 1 of 2)
- table 7-21 windows registers
- table 7-22 AEC/AGC 3 registers
- 8 operating specifications
- 9 mechanical specifications
- 10 optical specifications
- revision history
Confidential for truly Only
color CMOS QSXGA (5 megapixel) image sensor with OmniBSI™ technology
OV5647
proprietary to OmniVision Technologies PRELIMINARY SPECIFICATION version 1.0
4.8 strobe flash and frame exposure
4.8.1 strobe flash control
The strobe signal is programmable. It supports both LED and Xenon modes. The polarity of the pulse can be changed.
The strobe signal is enabled (turned high/low depending on the pulse’s polarity) by requesting the signal via the SCCB
interface. Flash modules are triggered by the rising edge by default or by the falling edge if the signal polarity is changed.
It supports the following flashlight modes (see
table 4-9).
4.9 xenon flash control
After a strobe request is submitted, the strobe pulse will be activated at the beginning of the third frame (see figure 4-9).
The third frame will be correctly exposed. The pulse width can be changed in Xenon mode between 1H and 4H,
depending on register 0x3B00[3:2], where H is one row period.
figure 4-9 xenon flash mode
table 4-9 flashlight modes
mode output AEC / AGC AWB
xenon one-pulse no no
LED 1 pulse no no
LED 2 pulse no yes
LED 3 continuous yes yes
vertical
blanking
exposure
time
data
out
strobe
request
strobe
pulse
strobe
pulse
zoomedrequest here
1H
correctly
exposed
frame
5647_DS_4_9