CN105677434A - OTP (One Time Programmable) memory burn method for image sensor - Google Patents
OTP (One Time Programmable) memory burn method for image sensor Download PDFInfo
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- CN105677434A CN105677434A CN201610155114.2A CN201610155114A CN105677434A CN 105677434 A CN105677434 A CN 105677434A CN 201610155114 A CN201610155114 A CN 201610155114A CN 105677434 A CN105677434 A CN 105677434A
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Abstract
The invention provides an OTP (One Time Programmable) memory burn method for an image sensor. The method comprises the steps: burning image sensor corresponding parameter information in an OTP memory of the image sensor; when a baseband chip drives the image sensor, reading the parameter information in two manners, i.e., a manner I or a manner II as follows: according to the manner I, the baseband chip updates built-in image sensor driving parameters of the baseband chip according to the parameter information in the OTP memory and then initializes the image sensor, so as to enable the image sensor to work in an optimized state; or according to the manner II, the baseband chip initializes the image sensor by adopting the built-in driving parameters and then writes the parameter information in the OTP memory into the image sensor so as to partially or completely cover original driving parameters and enable the image sensor to work in the optimized state.
Description
Technical field
The present invention relates to field of image sensors, in particular to the method for burn-recording of single programmable (OTP) storer of a kind of image sensor.
Background technology
Along with the high speed development of image sensor application industry, high pixel, big Pixel becomes market major demands and developing direction, and the cost of single chips also becomes high thereupon, and good rate becomes the problem that scale of mass production must be considered.
And the difference of wafer, the impact of processing procedure, the changes of technique etc. all can cause the difference in image sensor chip performance, causes the good rate of image sensor to reduce, and need control version, batch, increase cost.
Existing image sensor chip often carries single programmable (OTP) storer, generally adopt the capacity of 8Kbit ~ 64Kbit, for burning WhiteBalance, LensShading, VCM(VoiceCoilMotor) etc. parameter information, but owing to image sensor has differentiation, the demand of concrete special parameter is difficult to control, the uncontrollability of image sensor chip parameter information on the wafer often occurred, causes wafer batch, version to need people for controlling. In addition, OTP is read after being connected with baseband chip (Baseband) by image sensor by baseband chip, in existing way, drives optimum configurations in baseband chip, causes the handiness of image sensor version poor, it is necessary to people is for controlling.
Summary of the invention
The present invention provides the OTP method for burn-recording of a kind of image sensor,
The parameter information of the corresponding described image sensor of burning in the OTP of image sensor; When baseband chip drives image sensor, read described parameter information;
Mode one: the image sensor that baseband chip carries according to the parameter information updating baseband chip in described OTP drives parameter, then initialisation image sensor, makes image sensor carry out work under optimization state;
Or, mode two: baseband chip adopts the driving parameter initialization image sensor carried, then by the parameter information write image sensor in OTP, part covers or covers former driving parameter completely, makes image sensor carry out work under optimization state.
Preferably, the parameter information of OTP is carried out precompression, to save the storage space of OTP; By baseband chip, the parameter information of OTP is read and decompresses.
Preferably, in the parameter information of OTP, increase verification error correction information, the parameter information of described OTP is carried out verification error correction.
Preferably, comprise in OTP parameter information: register address information, data information, characteristic information.
The present invention's burning in OTP has parameter information, and wherein parameter information has the driving information of different editions, can increase the handiness of image sensor change driving and the compatibility of image sensor driving, reduce costs.
Accompanying drawing explanation
Fig. 1 is the module diagram of image sensor and baseband chip in one embodiment of the invention;
Fig. 2 is the method for burn-recording of the OTP of image sensor in one embodiment of the invention;
Fig. 3 is the method for burn-recording of the OTP of image sensor in yet another embodiment of the invention.
Embodiment
In the specific descriptions of following preferred embodiment, with reference to forming the accompanying drawing appended by a part of the present invention. Appended accompanying drawing shows the specific embodiment that can realize the present invention by way of example. The embodiment of example is not intended to limit according to all embodiments of the present invention. It can be appreciated that under the prerequisite of scope not deviateing the present invention, it is possible to use other embodiments, it is also possible to carry out the amendment of structure or logicality. Therefore, following specific descriptions are not restrictive, and the scope of the present invention is limited by appending claims.
Please refer to Fig. 1, Fig. 1 is the module diagram of image sensor and baseband chip in one embodiment of the invention;
Please refer to Fig. 1, in Fig. 1, image sensor chip 10 comprises image sensor 11 and single programmable memory (OTP) 12, single programmable memory (OTP) 12 burning has the parameter information of described image sensor, this parameter information: white balance, lens correction value, driving information, can also comprise: register address information, data information, characteristic information, characteristic information is the differentiation parameter of a certain characteristic or performance, carries out different process according to this characteristic information in follow-up initialize or other operations. Image sensor is connected with baseband chip (Baseband) 20 by some total wire protocols, baseband chip 20 (Baseband) comprising: static RAM SRAM21(StaticRandomAccessMemory), the information such as driving parameter that store image sensor in SRAM21, the driving parameter stored at SRAM are the driving of corresponding version, such as version A; Baseband chip 20 also comprises: register Register22 etc., is read by single programmable memory OTP by the disparate modules of baseband chip, the work such as written information.
Please continue to refer to the method for burn-recording that Fig. 2, Fig. 2 are the OTP of image sensor in one embodiment of the invention, please also refer to Fig. 2, Fig. 1,
S200: the parameter information of the corresponding described image sensor of burning in the OTP12 of image sensor 10; When baseband chip 20 drives image sensor, read described parameter information;
S210: the image sensor that baseband chip 20 carries according to the parameter information updating baseband chip 20 in described OTP12 drives parameter, then initialisation image sensor, makes image sensor carry out work under optimization state;
In the present embodiment, the priority of the driving information comprised in the parameter information of OTP12 drives parameter higher than the image sensor carried in baseband chip 20, and the mode of renewal is for covering or part covering; After completing this step of updating, when baseband chip 20 drives image sensor chip, read described parameter information, described parameter information: white balance, lens correction value, driving information, can also comprise: register address information, data information, characteristic information, characteristic information is the differentiation parameter for certain type characteristic or performance, follow-up initialize or other operations carry out different process according to this characteristic information, it should be noted that the multiple version of driving information of OTP12, such as the driving information of version B, version C etc.Characteristic information is such as: when the electric charge spillage under image sensor intense light source being identified, integral image sensor there will be the deviation of consistence, the reference voltage value of regional effect pixel around can be spilled over to for pixel cell, reference voltage value is carried out classification, such as: be divided into grade one ~ grade four, different image sensors, to there being different grades, is processed for different grades by characteristic information afterwards. Described optimization state refers to: the state after calibration.
In the present embodiment, also the parameter information of OTP12 can be carried out precompression, to save the storage space of OTP12; By baseband chip 20, the parameter information of OTP12 is decompressed.
In the present embodiment, also can increase verification error correction information in the parameter information of OTP12, adopt baseband chip 20 that the parameter information of described OTP12 carries out verification error correction.
Comprise in OTP parameter information in the present embodiment: register address information and data information, by the controllability of register address information and data information, the handiness that change drives can be increased. Laying same batch controlled on wafer like this or the image sensor of particular batch.
Please continue to refer to the method for burn-recording that Fig. 3, Fig. 3 are the OTP of image sensor in yet another embodiment of the invention, please also refer to Fig. 3, Fig. 1,
S300: the parameter information of the corresponding described image sensor of burning in the OTP12 of image sensor 10; When baseband chip 20 drives image sensor chip, read described parameter information;
S310: baseband chip 20 adopts the driving parameter initialization image sensor carried, then by the parameter information write image sensor 10 in OTP12, or select different driving parameters according to preset value; Part covers or covers former driving parameter completely, makes image sensor carry out work under optimization state.
Described parameter information: white balance, lens correction value, driving information, can also comprise: register address information, data information, characteristic information, characteristic information is the differentiation parameter for a certain characteristic or performance, carrying out different process according to this characteristic information in follow-up initialize or other operations, the characteristic information in the present embodiment is identical with the characteristic information character in a upper embodiment. Described former driving parameter is the driving parameter that baseband chip 20 carries. Described optimization state refers to: the state after calibration.
In the present embodiment, also the parameter information of OTP12 can be carried out precompression, to save the storage space of OTP; By baseband chip 20, the parameter information of OTP12 is decompressed.
In the present embodiment, also can increase verification error correction information in the parameter information of OTP, adopt baseband chip that the parameter information of described OTP carries out verification error correction.
Comprise in OTP parameter information in the present embodiment: register address information and data information, by the controllability of register address information and data information, the handiness that change drives can be increased. Laying same batch controlled on wafer like this or the image sensor of particular batch.
Please also refer to Fig. 1 ~ Fig. 3, when reading the parameter information of OTP, white balance write static RAM 21, in lens correction value write register 22.
To those skilled in the art, although the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit or the essential characteristic of the present invention, it is possible to realize the present invention in other specific forms. Therefore, in any case all should regard embodiment as exemplary, and right and wrong are restrictive.
Claims (4)
1. the OTP method for burn-recording of an image sensor, it is characterised in that,
The parameter information of the corresponding described image sensor of burning in the OTP of image sensor;When baseband chip drives image sensor, read described parameter information;
Mode one: the image sensor that baseband chip carries according to the parameter information updating baseband chip in described OTP drives parameter, then initialisation image sensor, makes image sensor carry out work under optimization state;
Or, mode two: baseband chip adopts the driving parameter initialization image sensor carried, then by the parameter information write image sensor in OTP, part covers or covers former driving parameter completely, makes image sensor carry out work under optimization state.
2. the OTP method for burn-recording of image sensor according to claim 1, it is characterised in that, the parameter information of OTP is carried out precompression, to save the storage space of OTP; By baseband chip, the parameter information of OTP is read and decompresses.
3. the OTP method for burn-recording of image sensor according to claim 1, it is characterised in that, in the parameter information of OTP, increase verification error correction information, the parameter information of described OTP is carried out verification error correction.
4. the OTP method for burn-recording of image sensor according to claim 1, it is characterised in that, comprise in OTP parameter information: register address information, data information, characteristic information.
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| CN109947160A (en) * | 2019-04-10 | 2019-06-28 | 苏州浪潮智能科技有限公司 | A kind of output adjusting method and device of voltage regulator |
| CN110942486A (en) * | 2019-12-12 | 2020-03-31 | 展讯通信（上海）有限公司 | Method and device for storing camera calibration parameters and storage medium |
| CN112689095A (en) * | 2020-12-29 | 2021-04-20 | 上海摩勤智能技术有限公司 | Camera sensor focusing data calibration method and camera sensor |
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| CN112689095A (en) * | 2020-12-29 | 2021-04-20 | 上海摩勤智能技术有限公司 | Camera sensor focusing data calibration method and camera sensor |
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