Projeto de refer\u00eancia do m\u00f3dulo de c\u00e2mera OV2640![\"imagem.png\"\/](\"\/wp-content\/uploads\/image\/20230629\/1688036202956997.png\" "\\"1688036202956997.png\\"")
<\/p>\n
OBSERVA\u00c7\u00c3O:
\nO conector PWDN deve ser conectado ao aterramento se n\u00e3o for utilizado.
\nO pino de reinicializa\u00e7\u00e3o do sensor RESETB est\u00e1 ativo baixo.
\nAVDD \u00e9 uma fonte de alimenta\u00e7\u00e3o anal\u00f3gica de sensor de 2,8 V.
\nDVDD \u00e9 uma fonte de alimenta\u00e7\u00e3o digital de sensor de 1,3 V.
\nDOVDD \u00e9 uma alimenta\u00e7\u00e3o digital de E\/S do sensor de 1,8 V a 3,0 V.
\nO sensor AGND e DGND devem ser separados e conectados a um
\nponto \u00fanico na placa de circuito impresso externa (n\u00e3o conecte dentro do m\u00f3dulo).
\nC2 deve fechar para o sensor DVDD e DGND.
\nC3 deve fechar para os sensores SVDD, AVDD e AGND.
\nC4 deve fechar para o sensor VHRFH e AGND.
\nC5 deve fechar para o sensor VREFN e AGND.
\nC6 deve fechar para o sensor DOVDD e DGND.
\nC1 deve ficar pr\u00f3ximo ao sensor EVDD e DGND.
\nD9:D2 \u00e9 o m\u00f3dulo YUV e sa\u00edda RGB de 8 bits (D9:MSB, D2:LSB).
\nD9:D0 \u00e9 a sa\u00edda RGB bruta de 10 bits do m\u00f3dulo (D9:MSB, D0:LSB<\/p>\n<\/li>\n<\/ol>\n
2. Refer\u00eancia de interface de c\u00e2mera OV2640 para telefone com c\u00e2mera <\/p>\n
2.1 Defini\u00e7\u00e3o de Pin
\n O OV2640 tem porta de v\u00eddeo de 10 bits, D[9:0]. Para sa\u00edda bruta RGB de 10 bits, D[9:0] s\u00e3o usados. Para sa\u00edda de 8 bits
\nYCbCr, sa\u00edda RGB raw de 8 bits ou RGB 565 de 8 bits, somente D[9:2] s\u00e3o usados.
\n O sinal Href e Hsync est\u00e1 no mesmo pino \u2013 pino Href. A fun\u00e7\u00e3o deste pino pode ser
\nselecionado como fun\u00e7\u00e3o Href ou fun\u00e7\u00e3o Hsync pela configura\u00e7\u00e3o SCCB.
\n O barramento SIO_C e SIO_D devem ter resistores pull up externos, o valor t\u00edpico do pull up
\nresistores \u00e9 cerca de 4,7K.
\n Resetb \u00e9 ativo baixo. N\u00e3o h\u00e1 resistor pull-down\/pull-up interno. Pode ser controlado por um
\nGPIO, ou conectado ao DOVDD usando um resistor pull-up externo se n\u00e3o for usado. Se Resetb estiver conectado
\npara DOVDD, o m\u00f3dulo da c\u00e2mera OV2640 pode ser redefinido pela configura\u00e7\u00e3o SCCB.
\n PWDN \u00e9 ativo alto. N\u00e3o h\u00e1 resistor pull-down\/pull-up interno. Pode ser controlado por um
\nGPIO, ou conectado ao DGND usando um resistor pull-down externo, se n\u00e3o for usado.
\n2.2 Fonte de alimenta\u00e7\u00e3o
\nSe o DOVDD usar uma fonte de alimenta\u00e7\u00e3o diferente do AVDD, ent\u00e3o 3 reguladores devem ser usados.<\/p>\n
![\"imagem.png\"\/](\"\/wp-content\/uploads\/image\/20230629\/1688036280328520.png\" "\\"1688036280328520.png\\"")
<\/p>\n
3. Opera\u00e7\u00e3o da c\u00e2mera OV2640 <\/p>\n
3.1 Modos de economia de energia
\n Existem dois tipos de modos de economia de energia: modo de desligamento e modo de desligamento.
\n O modo de desligamento significa que no modo de economia de energia, toda a energia fornecida \u00e0 c\u00e2mera
\nm\u00f3dulo s\u00e3o mantidos. A c\u00e2mera \u00e9 colocada em modo de desligamento puxando PWDN alto. Para OV2640,
\nh\u00e1 uma grande corrente de desligamento, portanto o modo de desligamento n\u00e3o \u00e9 suportado pelo OV2640 para
\neconomia de energia. Mas o modo de desligamento ainda \u00e9 \u00fatil se o OV2640 compartilhar o barramento SCCB com outros dispositivos
\nou OV2640 compartilha barramento de v\u00eddeo com outra c\u00e2mera para aplica\u00e7\u00f5es de c\u00e2mera. Ent\u00e3o a pot\u00eancia do OV2640
\na opera\u00e7\u00e3o no modo de desligamento ainda \u00e9 introduzida aqui.
\n O modo desligado significa que no modo de economia de energia, todas as fontes de alimenta\u00e7\u00e3o do m\u00f3dulo da c\u00e2mera
\ns\u00e3o cortados. <\/p>\n
3.2 Opera\u00e7\u00e3o da c\u00e2mera no modo de desligamento <\/p>\n
3.2.1 Bateria ligada, reinicializa\u00e7\u00e3o de hardware
\nt1: de pot\u00eancias ligadas para Reset puxar alto, >= 3ms
\nt2: de Reset pull alto para inicializa\u00e7\u00e3o SCCB, >= 3ms
\nPasso 1:
\n A redefini\u00e7\u00e3o \u00e9 aplicada ao m\u00f3dulo de c\u00e2mera OV2640.
\nPasso 2:
\n Os poderes DOVDD, DVDD e AVDD s\u00e3o aplicados. Os 3 poderes podem ser aplicados simultaneamente.
\nSe aplicado separadamente, a sequ\u00eancia de inicializa\u00e7\u00e3o deve ser DOVDD primeiro, DVDD depois e AVDD
\n6 Confidencial da empresa
\nOVT Confidencial
\nNotas de aplica\u00e7\u00e3o de hardware do m\u00f3dulo de c\u00e2mera OV2640
\ndurar.
\nEtapa 3:
\n ap\u00f3s 3 ms da \u00faltima energia aplicada, puxe o Reset alto.
\nPasso 4:
\n Ap\u00f3s 3ms, inicialize o OV2640 pela inicializa\u00e7\u00e3o SCCB. Encontre a configura\u00e7\u00e3o de inicializa\u00e7\u00e3o em
\n\u201cNotas de aplica\u00e7\u00e3o do software do m\u00f3dulo de c\u00e2mera OV2640\u201d ou entre em contato com a FAE local da OmniVision.
\nEtapa 5:
\n Puxe PWDN alto. Coloque o OV2640 no modo de desligamento.
\nEtapa 6:
\n Puxe o XCLK para baixo.
\n Ap\u00f3s a bateria estar ligada, as c\u00e2meras OV2640 devem ser configuradas para o modo de desligamento para minimizar o consumo de energia.
\nconsumo. As c\u00e2meras devem ser inicializadas primeiro e, em seguida, definidas para o modo de desligamento.<\/p>\n
3.2.2 Bateria ligada, reinicializa\u00e7\u00e3o do software
\nt1: de energia ligada at\u00e9 reinicializa\u00e7\u00e3o do software SCCB, >= 3ms
\nt2: da reinicializa\u00e7\u00e3o do software \u00e0 inicializa\u00e7\u00e3o do SCCB, >= 2 ms
\nPasso 1:
\n Os poderes DOVDD, DVDD e AVDD s\u00e3o aplicados. Os 3 poderes podem ser aplicados simultaneamente.
\nSe aplicado separadamente, a sequ\u00eancia de inicializa\u00e7\u00e3o deve ser DOVDD primeiro, DVDD depois e AVDD
\ndurar.
\n7 Empresa Confidencial
\nOVT Confidencial
\nNotas de aplica\u00e7\u00e3o de hardware do m\u00f3dulo de c\u00e2mera OV2640
\nPasso 2:
\n ap\u00f3s 3 ms da \u00faltima alimenta\u00e7\u00e3o aplicada, reinicie o m\u00f3dulo da c\u00e2mera OV2640 por grava\u00e7\u00e3o SCCB.
\nEtapa 3:
\n Ap\u00f3s 2ms, inicialize o OV2640 pela inicializa\u00e7\u00e3o SCCB. Encontre a configura\u00e7\u00e3o de inicializa\u00e7\u00e3o em
\n\u201cNotas de aplica\u00e7\u00e3o do software do m\u00f3dulo de c\u00e2mera OV2640\u201d ou entre em contato com a FAE local da OmniVision.
\nPasso 4:
\n Puxe PWDN alto. Coloque o OV2640 no modo de desligamento.
\nEtapa 6:
\n Puxe o XCLK para baixo.
\n3.2.3 Despertar ap\u00f3s desligamento
\nPasso 1:
\n Aplicar XCLK
\nPasso 2:
\n ap\u00f3s 10 ms, puxe PWDN baixo
\nEtapa 3:
\nEtapa opcional 4:
\n Inicializa\u00e7\u00e3o.
\n3.2.4 Desligar
\nPasso 1:
\n Puxe o pino PWDN para cima.
\n8 Confidencial da empresa
\nPWDN
\nSIO_C
\nSIO_D
\nXCLK
\nPWDN
\nSIO_C
\nSIO_D
\nXCLK
\nOVT Confidencial
\nNotas de aplica\u00e7\u00e3o de hardware do m\u00f3dulo de c\u00e2mera OV2640
\nPasso 2:
\n Puxe o XCLK para baixo <\/p>\n
3.3 Opera\u00e7\u00e3o da c\u00e2mera no modo desligado<\/p>\n
3.3.1 Bateria ligada
\n Nenhuma opera\u00e7\u00e3o. O m\u00f3dulo da c\u00e2mera est\u00e1 desligado. <\/p>\n
3.3.2 C\u00e2mera ligada, reinicializa\u00e7\u00e3o de hardware
\nt1: de energia ligada at\u00e9 reinicializa\u00e7\u00e3o do software SCCB, >= 3ms
\nt2: da reinicializa\u00e7\u00e3o do software \u00e0 inicializa\u00e7\u00e3o do SCCB, >= 2 ms
\nEtapa<\/p>\n
1:
\n A redefini\u00e7\u00e3o \u00e9 aplicada ao m\u00f3dulo de c\u00e2mera OV2640.
\nEtapa <\/p>\n
2: 3: 12 Confidencial da empresa <\/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\/pt\/wp-json\/wp\/v2\/posts\/11810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dgzx.hk\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dgzx.hk\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dgzx.hk\/pt\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/dgzx.hk\/pt\/wp-json\/wp\/v2\/comments?post=11810"}],"version-history":[{"count":0,"href":"https:\/\/dgzx.hk\/pt\/wp-json\/wp\/v2\/posts\/11810\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dgzx.hk\/pt\/wp-json\/wp\/v2\/media\/11811"}],"wp:attachment":[{"href":"https:\/\/dgzx.hk\/pt\/wp-json\/wp\/v2\/media?parent=11810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dgzx.hk\/pt\/wp-json\/wp\/v2\/categories?post=11810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dgzx.hk\/pt\/wp-json\/wp\/v2\/tags?post=11810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n Os poderes DOVDD, DVDD e AVDD s\u00e3o aplicados. 3 poderes podem ser aplicados simultaneamente.
\nSe aplicado separadamente, a sequ\u00eancia de inicializa\u00e7\u00e3o deve ser DOVDD primeiro, DVDD depois e AVDD
\ndurar.
\nEtapa <\/span><\/p>\n
\n ap\u00f3s 3 ms da \u00faltima energia aplicada, puxe o Reset alto.
\nEtapa 5:
\n9 Confidencial da empresa
\nOVT Confidencial
\nNotas de aplica\u00e7\u00e3o de hardware do m\u00f3dulo de c\u00e2mera OV2640
\n Ap\u00f3s 3ms, inicialize o OV2640 pela inicializa\u00e7\u00e3o SCCB. Encontre a configura\u00e7\u00e3o de inicializa\u00e7\u00e3o em
\n\u201cNotas de aplica\u00e7\u00e3o do software do m\u00f3dulo de c\u00e2mera OV2640\u201d ou entre em contato com a FAE local da OmniVision.
\n3.3.3 C\u00e2mera ligada, reinicializa\u00e7\u00e3o do software
\nt1: de energia ligada at\u00e9 reinicializa\u00e7\u00e3o do software SCCB, >= 3ms
\nt2: da reinicializa\u00e7\u00e3o do software \u00e0 inicializa\u00e7\u00e3o do SCCB, >= 2 ms
\nPasso 1:
\n Os poderes DOVDD, DVDD e AVDD s\u00e3o aplicados. Os 3 poderes podem ser aplicados simultaneamente.
\nSe aplicado separadamente, a sequ\u00eancia de inicializa\u00e7\u00e3o deve ser DOVDD primeiro, DVDD depois e AVDD
\ndurar.
\nPasso 2:
\n ap\u00f3s 3 ms da \u00faltima alimenta\u00e7\u00e3o aplicada, reinicie o m\u00f3dulo da c\u00e2mera OV2640 por grava\u00e7\u00e3o SCCB.
\nEtapa 3:
\n Ap\u00f3s 2 ms, inicialize o OV2640 pela inicializa\u00e7\u00e3o SCCB. Encontre a configura\u00e7\u00e3o de inicializa\u00e7\u00e3o em
\n\u201cNotas de aplica\u00e7\u00e3o do software do m\u00f3dulo de c\u00e2mera OV2640\u201d ou entre em contato com a FAE local da OmniVision.
\n10 Confidencial da empresa
\nOVT Confidencial
\nNotas de aplica\u00e7\u00e3o de hardware do m\u00f3dulo de c\u00e2mera OV2640
\n3.3.4 C\u00e2mera desligada
\nPasso 1.
\n Puxe o XCLK para baixo,
\nPasso 2.
\n Desligue AVDD, DVDD e DOVDD. Os 3 poderes podem ser desligados simultaneamente. Se
\ndesligados separadamente, o AVDD deve ser desligado primeiro, o DVDD em segundo e o DOVDD em terceiro.
\nEtapa 3.
\n Puxe PWDN baixo e RESET
\n11 Confidencial da empresa
\nDOVDD
\nDVDD
\nAVDD
\nXCLK
\nReiniciar
\nPWDN
\nOVT Confidencial
\nNotas de aplica\u00e7\u00e3o de hardware do m\u00f3dulo de c\u00e2mera OV2640
\n4. Compartilhamento de barramento SCCB
\n O barramento SCCB do m\u00f3dulo de c\u00e2mera OV2640 pode compartilhar com outro dispositivo SCCB. Quando OV2640
\nest\u00e1 funcionando, a opera\u00e7\u00e3o de leitura\/grava\u00e7\u00e3o \u00e9 separada pelo endere\u00e7o do dispositivo. O endere\u00e7o do dispositivo do OV2640
\n\u00e9 0x60. A leitura\/escrita do SCCB em endere\u00e7os diferentes dos 2 endere\u00e7os acima n\u00e3o afetar\u00e1 os registros do SCCB
\nde OV2640.
\n O barramento SCCB do OV2640 pode ser compartilhado com outros dispositivos tanto no modo de desligamento quanto
\nmodo de desligamento. Quando o m\u00f3dulo da c\u00e2mera OV2640 \u00e9 desligado ou desligado, o barramento SCCB \u00e9
\ndeixe livre. O SCCB do OV2640 n\u00e3o afeta a leitura\/grava\u00e7\u00e3o de outro dispositivo SCCB.<\/p>\n
\nOVT Confidencial<\/span><\/p>\n