OV2640 \u76f8\u6a5f\u6a21\u7d44\u53c3\u8003\u8a2d\u8a08![\"\u5716\u7247.png\"\/](\"\/wp-content\/uploads\/image\/20230629\/1688036202956997.png\" "\\"1688036202956997.png\\"")
<\/p>\n
\u7b46\u8a18\uff1a
\n\u5982\u679c\u4e0d\u4f7f\u7528\uff0c\u9023\u63a5\u5668 PWDN \u61c9\u63a5\u5730\u3002
\n\u611f\u6e2c\u5668\u5fa9\u4f4d\u5f15\u8173 RESETB \u4f4e\u96fb\u5e73\u6709\u6548\u3002
\nAVDD \u662f 2.8V \u611f\u6e2c\u5668\u985e\u6bd4\u96fb\u6e90\u3002
\nDVDD\u662f1.3V\u611f\u6e2c\u5668\u6578\u4f4d\u96fb\u6e90\u3002
\nDOVDD \u70ba 1.8V \u81f3 3.0V \u611f\u6e2c\u5668\u6578\u4f4d IO \u96fb\u6e90\u3002
\n\u611f\u6e2c\u5668 AGND \u548c DGND \u61c9\u5206\u958b\u4e26\u9023\u63a5\u5230
\n\u5916\u90e8 PCB \u4e0a\u7684\u55ae\u9ede\uff08\u4e0d\u9023\u63a5'\uff1b\u4e0d\u9023\u63a5\u5167\u90e8\u6a21\u7d44\uff09\u3002
\nC2 \u61c9\u9760\u8fd1\u611f\u6e2c\u5668 DVDD \u548c DGND\u3002
\nC3 \u61c9\u9760\u8fd1\u611f\u6e2c\u5668 SVDD\u3001AVDD \u548c AGND\u3002
\nC4 \u61c9\u9760\u8fd1\u611f\u6e2c\u5668 VHRFH \u548c AGND\u3002
\nC5 \u61c9\u9760\u8fd1\u611f\u6e2c\u5668 VREFN \u548c AGND\u3002
\nC6 \u61c9\u9760\u8fd1\u611f\u6e2c\u5668 DOVDD \u548c DGND\u3002
\nC1 \u61c9\u9760\u8fd1\u611f\u6e2c\u5668 EVDD \u548c DGND\u3002
\nD9:D2 \u662f\u6a21\u7d44 YUV \u548c RGB 8bits \u8f38\u51fa\uff08D9:MSB, D2:LSB\uff09\u3002
\nD9:D0 \u662f\u6a21\u7d44\u539f\u59cb RGB 10 \u4f4d\u5143\u8f38\u51fa\uff08D9:MSB\u3001D0:LSB<\/p>\n<\/li>\n<\/ol>\n
2. OV2640 \u62cd\u7167\u624b\u6a5f\u76f8\u6a5f\u4ecb\u9762\u53c3\u8003 <\/p>\n
2.1 \u5f15\u8173\u5b9a\u7fa9
\n OV2640\u670910\u4f4d\u5143\u8996\u8a0a\u57e0D[9:0]\u3002\u5c0d\u65bc 10 \u4f4d\u5143 RGB \u539f\u59cb\u8f38\u51fa\uff0c\u4f7f\u7528 D[9:0]\u3002\u5c0d\u65bc 8 \u4f4d\u5143
\nYCbCr\uff0c8 \u4f4d\u5143 RGB raw \u6216 8 \u4f4d\u5143 RGB 565 \u8f38\u51fa\uff0c\u50c5\u4f7f\u7528 D[9:2]\u3002
\n Href \u548c Hsync \u8a0a\u865f\u4f4d\u65bc\u540c\u4e00\u5f15\u8173 - Href \u5f15\u8173\u3002\u6b64\u5f15\u8173\u7684\u529f\u80fd\u53ef\u4ee5\u662f
\n\u900f\u904e SCCB \u8a2d\u5b9a\u9078\u64c7 Href \u529f\u80fd\u6216 Hsync \u529f\u80fd\u3002
\n SIO_C\u548cSIO_D\u532f\u6d41\u6392\u61c9\u5177\u6709\u5916\u90e8\u4e0a\u62c9\u96fb\u963b\uff0c\u4e0a\u62c9\u7684\u5178\u578b\u503c
\n\u96fb\u963b\u7d04\u70ba4.7K\u3002
\n Resetb \u4f4e\u96fb\u4f4d\u6709\u6548\u3002\u6c92\u6709\u5167\u90e8\u4e0b\u62c9\/\u4e0a\u62c9\u96fb\u963b\u3002\u5b83\u53ef\u4ee5\u7531\u4e00\u500b\u63a7\u5236
\nGPIO\uff0c\u6216\u8005\u5982\u679c\u4e0d\u4f7f\u7528\u5247\u4f7f\u7528\u5916\u90e8\u4e0a\u62c9\u96fb\u963b\u9023\u63a5\u5230 DOVDD\u3002\u5982\u679cResetb\u5df2\u9023\u63a5
\n\u81f3 DOVDD\uff0cOV2640 \u76f8\u6a5f\u6a21\u7d44\u53ef\u900f\u904e SCCB \u8a2d\u5b9a\u9032\u884c\u91cd\u8a2d\u3002
\n PWDN \u9ad8\u96fb\u4f4d\u6709\u6548\u3002\u6c92\u6709\u5167\u90e8\u4e0b\u62c9\/\u4e0a\u62c9\u96fb\u963b\u3002\u5b83\u53ef\u4ee5\u7531\u4e00\u500b\u63a7\u5236
\nGPIO\uff0c\u6216\u5982\u679c\u4e0d\u4f7f\u7528\u5247\u4f7f\u7528\u5916\u90e8\u4e0b\u62c9\u96fb\u963b\u9023\u63a5\u5230 DGND\u3002
\n2.2 \u96fb\u6e90
\n\u5982\u679c DOVDD \u4f7f\u7528\u8207 AVDD \u4e0d\u540c\u7684\u96fb\u6e90\uff0c\u5247\u61c9\u4f7f\u7528 3 \u500b\u7a69\u58d3\u5668\u3002<\/p>\n
![\"\u5716\u7247.png\"\/](\"\/wp-content\/uploads\/image\/20230629\/1688036280328520.png\" "\\"1688036280328520.png\\"")
<\/p>\n
3.OV2640\u76f8\u6a5f\u64cd\u4f5c <\/p>\n
3.1 \u7701\u96fb\u6a21\u5f0f
\n \u67092\u7a2e\u7701\u96fb\u6a21\u5f0f\uff1a\u6389\u96fb\u6a21\u5f0f\u548c\u65b7\u96fb\u6a21\u5f0f\u3002
\n \u6389\u96fb\u6a21\u5f0f\u662f\u6307\u5728\u7701\u96fb\u6a21\u5f0f\u4e0b\uff0c\u76f8\u6a5f\u7684\u6240\u6709\u96fb\u6e90
\n\u6a21\u7d44\u88ab\u4fdd\u7559\u3002\u900f\u904e\u62c9\u9ad8 PWDN \u5c07\u76f8\u6a5f\u8a2d\u5b9a\u70ba\u6389\u96fb\u6a21\u5f0f\u3002\u5c0d\u65bcOV2640\uff0c
\n\u6389\u96fb\u96fb\u6d41\u8f03\u5927\uff0c\u56e0\u6b64 OV2640 \u4e0d\u652f\u63f4\u6389\u96fb\u6a21\u5f0f
\n\u7701\u96fb\u3002\u4f46\u5982\u679c OV2640 \u8207\u5176\u4ed6\u8a2d\u5099\u5171\u4eab SCCB \u7e3d\u7dda\uff0c\u6389\u96fb\u6a21\u5f0f\u4ecd\u7136\u6709\u7528
\n\u6216 OV2640 \u8207\u53e6\u4e00\u53f0\u76f8\u6a5f\u5171\u4eab\u8996\u8a0a\u532f\u6d41\u6392\u4ee5\u7528\u65bc\u76f8\u6a5f\u61c9\u7528\u3002\u6240\u4ee5OV2640\u96fb\u6e90
\n\u9019\u88e1\u4ecd\u4ecb\u7d39\u6389\u96fb\u6a21\u5f0f\u4e0b\u7684\u64cd\u4f5c\u3002
\n \u65b7\u96fb\u6a21\u5f0f\u662f\u6307\u5728\u7701\u96fb\u6a21\u5f0f\u4e0b\uff0c\u76f8\u6a5f\u6a21\u7d44\u7684\u6240\u6709\u96fb\u6e90\u90fd\u95dc\u9589\u3002
\n\u88ab\u524a\u6e1b\u3002 <\/p>\n
3.2 \u76f8\u6a5f\u5728\u6389\u96fb\u6a21\u5f0f\u4e0b\u7684\u64cd\u4f5c <\/p>\n
3.2.1 \u96fb\u6c60\u958b\u555f\u3001\u786c\u9ad4\u91cd\u7f6e
\nt1\uff1a\u5f9e\u4e0a\u96fb\u5230\u91cd\u8a2d\u62c9\u9ad8\uff0c>= 3ms
\nt2\uff1a\u5f9e\u91cd\u8a2d\u62c9\u9ad8\u5230 SCCB \u521d\u59cb\u5316\uff0c>= 3ms
\n\u6b65\u9a5f\u4e00\uff1a
\n \u91cd\u8a2d\u61c9\u7528\u65bc OV2640 \u76f8\u6a5f\u6a21\u7d44\u3002
\n\u6b65\u9a5f2\uff1a
\n \u61c9\u7528 DOVDD\u3001DVDD \u548c AVDD \u96fb\u6e90\u3002 3\u7a2e\u529b\u91cf\u53ef\u4ee5\u540c\u6642\u904b\u7528\u3002
\n\u82e5\u55ae\u7368\u61c9\u7528\uff0c\u4e0a\u96fb\u9806\u5e8f\u61c9\u70ba\u5148 DOVDD\u3001\u518d DVDD\u3001AVDD
\n6 \u516c\u53f8\u6a5f\u5bc6
\nOVT \u6a5f\u5bc6
\nOV2640 \u76f8\u6a5f\u6a21\u7d44\u786c\u9ad4\u61c9\u7528\u7b46\u8a18
\n\u6700\u5f8c\u7684\u3002
\n\u6b65\u9a5f3\uff1a
\n \u6700\u5f8c\u4e00\u6b21\u901a\u96fb 3ms \u5f8c\uff0c\u62c9\u9ad8\u5fa9\u4f4d\u3002
\n\u7b2c4\u6b65\uff1a
\n 3ms\u5f8c\uff0c\u900f\u904eSCCB\u521d\u59cb\u5316\u4f86\u521d\u59cb\u5316OV2640\u3002\u8acb\u5f9e\u4ee5\u4e0b\u4f4d\u7f6e\u627e\u5230\u521d\u59cb\u5316\u8a2d\u7f6e
\n\u300cOV2640 \u76f8\u6a5f\u6a21\u7d44\u8edf\u9ad4\u61c9\u7528\u8aaa\u660e\u300d\u6216\u806f\u7d61 OmniVision \u672c\u5730 FAE\u3002
\n\u7b2c5\u6b65\uff1a
\n \u62c9\u9ad8PWDN\u3002\u5c07 OV2640 \u8a2d\u5b9a\u70ba\u6389\u96fb\u6a21\u5f0f\u3002
\n\u7b2c6\u6b65\uff1a
\n \u5c07 XCLK \u62c9\u4f4e\u3002
\n \u96fb\u6c60\u958b\u555f\u5f8c\uff0cOV2640\u76f8\u6a5f\u61c9\u8a2d\u5b9a\u70ba\u65b7\u96fb\u6a21\u5f0f\u4ee5\u6700\u5927\u9650\u5ea6\u5730\u6e1b\u5c11\u96fb\u91cf
\n\u6d88\u8017\u3002\u61c9\u5148\u521d\u59cb\u5316\u76f8\u6a5f\uff0c\u7136\u5f8c\u5c07\u5176\u8a2d\u5b9a\u70ba\u65b7\u96fb\u6a21\u5f0f\u3002<\/p>\n
3.2.2 \u96fb\u6c60\u958b\u555f\u3001\u8edf\u9ad4\u5fa9\u4f4d
\nt1\uff1a\u5f9e\u4e0a\u96fb\u5230 SCCB \u8edf\u9ad4\u5fa9\u4f4d\uff0c>= 3ms
\nt2\uff1a\u5f9e\u8edf\u9ad4\u91cd\u8a2d\u5230SCCB\u521d\u59cb\u5316\uff0c>= 2ms
\n\u6b65\u9a5f\u4e00\uff1a
\n \u61c9\u7528 DOVDD\u3001DVDD \u548c AVDD \u96fb\u6e90\u3002 3\u7a2e\u529b\u91cf\u53ef\u4ee5\u540c\u6642\u904b\u7528\u3002
\n\u82e5\u55ae\u7368\u61c9\u7528\uff0c\u4e0a\u96fb\u9806\u5e8f\u61c9\u70ba\u5148 DOVDD\u3001\u518d DVDD\u3001AVDD
\n\u6700\u5f8c\u7684\u3002
\n7 \u516c\u53f8\u6a5f\u5bc6
\nOVT \u6a5f\u5bc6
\nOV2640 \u76f8\u6a5f\u6a21\u7d44\u786c\u9ad4\u61c9\u7528\u7b46\u8a18
\n\u6b65\u9a5f2\uff1a
\n \u6700\u5f8c\u4e00\u6b21\u901a\u96fb 3ms \u5f8c\uff0c\u900f\u904e SCCB \u5beb\u5165\u91cd\u8a2d OV2640 \u76f8\u6a5f\u6a21\u7d44\u3002
\n\u6b65\u9a5f3\uff1a
\n 2ms\u5f8c\uff0c\u900f\u904eSCCB\u521d\u59cb\u5316\u4f86\u521d\u59cb\u5316OV2640\u3002\u8acb\u5f9e\u4ee5\u4e0b\u4f4d\u7f6e\u627e\u5230\u521d\u59cb\u5316\u8a2d\u7f6e
\n\u300cOV2640 \u76f8\u6a5f\u6a21\u7d44\u8edf\u9ad4\u61c9\u7528\u8aaa\u660e\u300d\u6216\u806f\u7d61 OmniVision \u672c\u5730 FAE\u3002
\n\u7b2c4\u6b65\uff1a
\n \u62c9\u9ad8PWDN\u3002\u5c07 OV2640 \u8a2d\u5b9a\u70ba\u6389\u96fb\u6a21\u5f0f\u3002
\n\u7b2c6\u6b65\uff1a
\n \u62c9\u4f4e XCLK\u3002
\n3.2.3 \u6389\u96fb\u559a\u9192
\n\u6b65\u9a5f\u4e00\uff1a
\n \u61c9\u7528XCLK
\n\u6b65\u9a5f2\uff1a
\n 10ms\u5f8c\uff0c\u62c9\u4f4ePWDN
\n\u6b65\u9a5f3\uff1a
\n\u53ef\u9078\u6b65\u9a5f 4\uff1a
\n \u521d\u59cb\u5316\u3002
\n3.2.4 \u6389\u96fb
\n\u6b65\u9a5f\u4e00\uff1a
\n \u5c07 PWDN \u63a5\u8173\u62c9\u9ad8\u3002
\n8 \u516c\u53f8\u6a5f\u5bc6
\n\u5bc6\u78bc\u7db2\u8def
\nSIO_C
\nSIO_D
\nX\u6642\u9418
\n\u5bc6\u78bc\u7db2\u8def
\nSIO_C
\nSIO_D
\nX\u6642\u9418
\nOVT \u6a5f\u5bc6
\nOV2640 \u76f8\u6a5f\u6a21\u7d44\u786c\u9ad4\u61c9\u7528\u7b46\u8a18
\n\u6b65\u9a5f2\uff1a
\n \u5c07 XCLK \u62c9\u4f4e <\/p>\n
3.3 \u95dc\u6a5f\u6a21\u5f0f\u4e0b\u76f8\u6a5f\u64cd\u4f5c<\/p>\n
3.3.1 \u96fb\u6c60\u958b\u555f
\n \u6c92\u6709\u64cd\u4f5c\u3002\u651d\u5f71\u6a5f\u6a21\u7d44\u65b7\u96fb\u3002 <\/p>\n
3.3.2 \u76f8\u6a5f\u958b\u555f\u3001\u786c\u9ad4\u5fa9\u4f4d
\nt1\uff1a\u5f9e\u4e0a\u96fb\u5230 SCCB \u8edf\u9ad4\u5fa9\u4f4d\uff0c>= 3ms
\nt2\uff1a\u5f9e\u8edf\u9ad4\u91cd\u8a2d\u5230SCCB\u521d\u59cb\u5316\uff0c>= 2ms
\n\u6b65<\/p>\n
1:
\n \u91cd\u8a2d\u61c9\u7528\u65bc OV2640 \u76f8\u6a5f\u6a21\u7d44\u3002
\n\u6b65 <\/p>\n
2: 3: 12 \u516c\u53f8\u6a5f\u5bc6 <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>","protected":false},"excerpt":{"rendered":" OmniVision Technologies, Inc. reserves the right to make changes without further notice to any product herein to improve reliability, function or design. OmniVision does not assume any liability arising out of the application or use of any project, circuit described herein; neither does it convey any license under its patent nor the right of others. This document contains information of a proprietary nature. None of this information shall be divulged to persons other than OmniVision Technologies, Inc. employee authorized by the nature of their duties to receive such information, or individuals or organizations authorized by OmniVision Technologies, Inc. OV2640 Camera Module Reference Design NOTE: Connector PWDN should be connected to ground if unused. Sensor reset pin RESETB is active low. AVDD is 2.8V sensor analog power. DVDD is 1.3V sensor digital power. DOVDD is 1.8V to 3.0V sensor digital IO power. Sensor AGND and DGND should be separated and connect to a single point at outside PCB (Don't connect inside module). C2 should close to sensor DVDD and DGND. C3 should close to sensor SVDD, AVDD and AGND. C4 should close to sensor VHRFH and AGND. C5 should close to sensor VREFN and AGND. C6 should close to sensor DOVDD and DGND. C1 should close to sensor EVDD and DGND. D9:D2 is module YUV and RGB 8bits output (D9:MSB, D2:LSB). D9:D0 is module raw RGB 10 bits output (D9:MSB, D0:LSB 2. OV2640 Camera Interface Reference for Camera Phone 2.1 Pin Definition OV2640 has 10-bit video port, D[9:0]. For 10-bit RGB raw output, D[9:0] are used. For 8-bit YCbCr, 8-bit RGB raw or 8-bit RGB 565 output, only D[9:2] are used. The Href and Hsync signal is on the same pin \u2013 Href pin. The function of this pin could be selected as either Href function or Hsync function by SCCB setting. The SIO_C and SIO_D bus should have external pull up resistors, the typical value of the pull up resistors is about 4.7K. Resetb is active low. There is no internal pull-down\/pull-up resistor. It can be controlled by a GPIO, or connected to DOVDD using an external pull-up resistor if not used. If Resetb is connected to DOVDD, the OV2640 camera module could be reset by SCCB setting. PWDN is active high. There is no internal pull-down\/pull-up resistor. It can be controlled by a GPIO, or connected to DGND using an external pull-down resistor if not used. 2.2 Power Supply If DOVDD uses different power supply than AVDD, then 3 regulators should be used. 3. OV2640 Camera Operation 3.1 Power Saving Modes There are 2 kind of power saving modes: power down mode and power off mode. Power down mode means that in power saving mode, all the power supplies to the camera module are kept. The camera is set into power down mode by pull high PWDN. For OV2640, there have big power down current, so power down mode is not supported by OV2640 for power saving. But power down mode is still useful if OV2640 shares SCCB bus with other devices or OV2640 shares video bus with another camera for camera applications. So OV2640 power operation in power down mode is still introduced here. Power off mode means that in power saving mode, all the power supplies to the camera module are cut. 3.2 Camera Operation in Power Down Mode 3.2.1 Battery On, Hardware Reset t1: from powers on to Reset pull high, >= 3ms t2: from Reset pull high to SCCB initialization, >= 3ms Step 1: Reset is applied to OV2640 camera module. Step 2: DOVDD, DVDD and AVDD powers are applied. The 3 powers could be applied simultaneously. If applied separately, the power on sequence should be DOVDD first, DVDD second and AVDD 6 Company Confidential OVT Confidential OV2640 Camera Module Hardware Application Notes last. Step 3: after 3ms of last power applied, pull high Reset. Step 4: After 3ms, initialize OV2640 by SCCB initialization. Please find initialization setting from \u201cOV2640 Camera Module Software Application Notes\u201d or contact OmniVision local FAE. Step 5: Pull high PWDN. Set OV2640 to power down mode. Step 6: Pull XCLK low. After battery on, OV2640 cameras should be set to power down mode to minimize power consumption. The cameras should be initialized first, then set to power down mode. 3.2.2 Battery On, Software Reset t1: from powers on to SCCB software reset, >= 3ms t2: from software reset to SCCB initialization, >= 2ms Step 1: DOVDD, DVDD and AVDD powers are applied. The 3 powers could be applied simultaneously. If applied separately, the power on sequence should be DOVDD first, DVDD second and AVDD last. 7 Company Confidential OVT Confidential OV2640 Camera Module Hardware Application Notes Step 2: after 3ms of last power applied, reset OV2640 camera module by SCCB write. Step 3: After 2ms, initialize OV2640 by SCCB initialization. Please find the initialization setting from \u201cOV2640 Camera Module Software Application Notes\u201d or contact OmniVision local FAE. Step 4: Pull high PWDN. Set OV2640 to power down mode. Step 6: Pull low XCLK. 3.2.3 Wake up From Power Down Step 1: Apply XCLK Step 2: after 10ms, Pull Low PWDN Step 3: Optional Step 4: Initialization. 3.2.4 Power Down Step 1: Pull PWDN pin high. 8 Company Confidential PWDN SIO_C SIO_D XCLK PWDN SIO_C SIO_D XCLK OVT Confidential OV2640 Camera Module Hardware Application Notes Step 2: Pull XCLK low 3.3 Camera Operation in Power Off Mode 3.3.1 Battery On No operation. Camera module is power off. 3.3.2 Camera On, Hardware Reset t1: from powers on to SCCB software reset, >= 3ms t2: from software reset to SCCB initialization, >= 2ms Step 1: Reset is applied to OV2640 Camera Module. Step 2: DOVDD, DVDD and AVDD powers are applied. The 3 powers could be applied simultaneously. If applied separately, the power on sequence should be DOVDD first, DVDD second and AVDD last. Step 3: after 3ms of last power applied, pull high Reset. Step 5: 9 Company Confidential OVT Confidential OV2640 Camera Module Hardware Application Notes After 3ms, initialize OV2640 by<\/p>","protected":false},"author":5,"featured_media":11811,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","footnotes":""},"categories":[381],"tags":[388,376,377],"class_list":["post-11810","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-ov2640","tag-camera-module","tag-dogoozx"],"_links":{"self":[{"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/posts\/11810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/comments?post=11810"}],"version-history":[{"count":0,"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/posts\/11810\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/media\/11811"}],"wp:attachment":[{"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/media?parent=11810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/categories?post=11810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgzx.hk\/zh\/wp-json\/wp\/v2\/tags?post=11810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n \u61c9\u7528 DOVDD\u3001DVDD \u548c AVDD \u96fb\u6e90\u3002\u9019 \u53ef\u4ee5\u540c\u6642\u61c9\u75283\u7a2e\u529b\u91cf\u3002
\n\u82e5\u55ae\u7368\u61c9\u7528\uff0c\u4e0a\u96fb\u9806\u5e8f\u61c9\u70ba\u5148 DOVDD\u3001\u518d DVDD\u3001AVDD
\n\u6700\u5f8c\u7684\u3002
\n\u6b65 <\/span><\/p>\n
\n \u6700\u5f8c\u4e00\u6b21\u901a\u96fb 3ms \u5f8c\uff0c\u62c9\u9ad8\u5fa9\u4f4d\u3002
\n\u7b2c5\u6b65\uff1a
\n9 \u516c\u53f8\u6a5f\u5bc6
\nOVT \u6a5f\u5bc6
\nOV2640 \u76f8\u6a5f\u6a21\u7d44\u786c\u9ad4\u61c9\u7528\u7b46\u8a18
\n 3ms\u5f8c\uff0c\u900f\u904eSCCB\u521d\u59cb\u5316\u4f86\u521d\u59cb\u5316OV2640\u3002\u8acb\u5f9e\u4ee5\u4e0b\u4f4d\u7f6e\u627e\u5230\u521d\u59cb\u5316\u8a2d\u7f6e
\n\u300cOV2640 \u651d\u5f71\u6a5f\u6a21\u7d44\u8edf\u9ad4\u61c9\u7528\u8aaa\u660e\u300d\u6216\u806f\u7d61 OmniVision \u7576\u5730 FAE\u3002
\n3.3.3 \u76f8\u6a5f\u958b\u555f\u3001\u8edf\u9ad4\u5fa9\u4f4d
\nt1\uff1a\u5f9e\u4e0a\u96fb\u5230 SCCB \u8edf\u9ad4\u5fa9\u4f4d\uff0c>= 3ms
\nt2\uff1a\u5f9e\u8edf\u9ad4\u91cd\u8a2d\u5230SCCB\u521d\u59cb\u5316\uff0c>= 2ms
\n\u6b65\u9a5f\u4e00\uff1a
\n \u61c9\u7528 DOVDD\u3001DVDD \u548c AVDD \u96fb\u6e90\u3002 3\u7a2e\u529b\u91cf\u53ef\u4ee5\u540c\u6642\u904b\u7528\u3002
\n\u82e5\u55ae\u7368\u61c9\u7528\uff0c\u4e0a\u96fb\u9806\u5e8f\u61c9\u70ba\u5148 DOVDD\u3001\u518d DVDD\u3001AVDD
\n\u6700\u5f8c\u7684\u3002
\n\u6b65\u9a5f2\uff1a
\n \u6700\u5f8c\u4e00\u6b21\u901a\u96fb 3ms \u5f8c\uff0c\u900f\u904e SCCB \u5beb\u5165\u91cd\u8a2d OV2640 \u76f8\u6a5f\u6a21\u7d44\u3002
\n\u6b65\u9a5f3\uff1a
\n 2ms\u5f8c\uff0c\u900f\u904eSCCB\u521d\u59cb\u5316\u4f86\u521d\u59cb\u5316OV2640\u3002\u8acb\u5f9e\u4ee5\u4e0b\u4f4d\u7f6e\u627e\u5230\u521d\u59cb\u5316\u8a2d\u7f6e
\n\u300cOV2640 \u76f8\u6a5f\u6a21\u7d44\u8edf\u9ad4\u61c9\u7528\u8aaa\u660e\u300d\u6216\u806f\u7d61 OmniVision \u672c\u5730 FAE\u3002
\n10 \u516c\u53f8\u6a5f\u5bc6
\nOVT \u6a5f\u5bc6
\nOV2640 \u76f8\u6a5f\u6a21\u7d44\u786c\u9ad4\u61c9\u7528\u7b46\u8a18
\n3.3.4 \u76f8\u6a5f\u95dc\u9589
\n\u6b65\u9a5f1\u3002
\n \u62c9\u4f4eXCLK\uff0c
\n\u6b65\u9a5f2\u3002
\n \u95dc\u9589 AVDD\u3001DVDD \u548c DOVDD\u3002 3\u500b\u96fb\u6e90\u53ef\u4ee5\u540c\u6642\u95dc\u9589\u3002\u5982\u679c
\n\u55ae\u7368\u95dc\u9589\u6642\uff0c\u61c9\u5148\u95dc\u9589 AVDD\uff0c\u5176\u6b21\u95dc\u9589 DVDD\uff0c\u7b2c\u4e09\u95dc\u9589 DOVDD\u3002
\n\u6b65\u9a5f 3.
\n \u62c9\u4f4e PWDN \u548c RESET
\n11 \u516c\u53f8\u6a5f\u5bc6
\n\u591a\u7dad\u96fb\u58d3
\nDVD\u5149\u789f
\n\u96fb\u58d3\u6e90
\nX\u6642\u9418
\n\u91cd\u7f6e
\n\u5bc6\u78bc\u7db2\u8def
\nOVT \u6a5f\u5bc6
\nOV2640 \u76f8\u6a5f\u6a21\u7d44\u786c\u9ad4\u61c9\u7528\u7b46\u8a18
\n4. SCCB \u5df4\u58eb\u5171\u4eab
\n OV2640\u651d\u5f71\u6a5f\u6a21\u7d44\u7684SCCB\u532f\u6d41\u6392\u53ef\u4ee5\u8207\u5176\u4ed6SCCB\u8a2d\u5099\u5171\u4eab\u3002\u7576OV2640
\n\u5de5\u4f5c\u6642\uff0c\u8b80\u53d6\/\u5beb\u5165\u64cd\u4f5c\u4ee5\u8a2d\u5099\u4f4d\u5740\u5206\u9694\u3002 OV2640\u7684\u8a2d\u5099\u4f4d\u5740
\n\u662f 0x60\u3002 SCCB \u8b80\u53d6\/\u5beb\u5165\u4e0a\u8ff0 2 \u500b\u4f4d\u5740\u4ee5\u5916\u7684\u4f4d\u5740\u4e0d\u6703\u5f71\u97ff SCCB \u66ab\u5b58\u5668
\nOV2640\u3002
\n OV2640\u7684SCCB\u532f\u6d41\u6392\u53ef\u4ee5\u5728\u6389\u96fb\u6a21\u5f0f\u548c\u65b7\u96fb\u6a21\u5f0f\u4e0b\u8207\u5176\u4ed6\u8a2d\u5099\u5171\u4eab
\n\u95dc\u6a5f\u6a21\u5f0f\u3002\u7576OV2640\u651d\u5f71\u6a5f\u6a21\u7d44\u6389\u96fb\u6216\u65b7\u96fb\u6642\uff0cSCCB\u7e3d\u7dda
\n\u81ea\u7531\u96e2\u958b\u3002 OV2640 \u7684 SCCB \u4e0d\u5f71\u97ff\u5176\u4ed6 SCCB \u8a2d\u5099\u7684\u8b80\u53d6\/\u5beb\u5165\u3002<\/p>\n
\nOVT \u6a5f\u5bc6<\/span><\/p>\n