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Tipos E Caracteristicas. Compact Flash • • Memory Stick

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Tipos E Caracteristicas. Compact Flash • • Memory Stick Cartões de Memórias Flash – Tipos e caracteristicas. Compact Flash A memória Compact Flash(chamada às vezes CF.) é um tipo de memória criada em 1994 pela firma SanDisk. A memória Compata Flash é constituída de um controlador memória e memória flash contidos numa caixa de pequena dimensão (42.8mm de amplitude e 36.4mm de altura), de dimensão inferior à uma pequena caixa de fósforos, e pesando 11.4 gramas. Existe dois tipos de cartas Compato Flashde dimensões diferentes : Os cartas Compatos Flash tipo I, possuindo uma espessura de 3.3mm; Os cartas Compatos Flash tipo II, possuindo uma espessura de 5mm. Os cartas CompactFlash são conformes à norma PCMCIA/ATA para conector de 50 pinos e PCMCIA para 68 pinos. Memory stick A memória Memory Stick ((notado MS ou MS Card) é um tipo de memória criada conjuntamente por Sony e SanDisk em janeiro de 2000. A arquitetura dos cartas Memory Stick é baseada em circuitos de memória lanterna elétrica (EEPROM) de tipo NAND. A memória Memory stick possui pequenas dimensões (21.5mm x 50.0mm x 2.8mm), equivalentes às de uma pequena caixa de fósforos, e pesa menos de 4 gramas. O acesso aos dados é realizado através de um conetor lateral que possui 10 pinos, permitindo atingir uma taxa de transferência de 14.4 Mb/s. Existe dois tipos de cartas Memory Stick, a memória Memory Stick dito “normal” e a memória “Magic Gate” que permite a proteção dos arquivos protegidos por direito autoral. MMC - Multimedia Card A memória Multimédia Card (notado MMC) é um tipo de memória criada conjuntamente por SanDisk e SIEMENS em novembro de 1997. A sua arquitetura é baseada numa combinação de memória (ROM) para as aplicações em leitura única e de memória flash para as necessidades de leitura/escrita. A memória MMC possui muito pequenas dimensões (24.0mm x 32.0mm x 1.4mm), equivalentes às de um selo postal, e pesa menos de 2.2 gramas. Existe dois tipos de cartas MMC que possuem voltagens diferentes: Os cartas MMC 3.3V, possuindo uma ranhura à esquerda Os cartas MMC 5V, possuindo uma ranhura à direita O acesso aos dados é realizado através de um conector lateral que possui 7 pinos, permitindo atingir uma taxa de transferência de 2 Mb/s, e potencialmente até a 2.5 MB/s. Secure Digital A memória Secure Digital (notado SD ou SD Card) é um tipo de memória criada por Matsushita Electronic, SanDisk e Toshiba em janeiro de 2000. A memória Secure Digital é uma memória especificamente desenvolvida para responder às exigências de segurança ultimamente aparecidas nos domínios dos dispositivos eletrônicos de audio e vídeos. Inclui assim um mecanismo de proteção de direito autoral que responde ao padrão SDMI (Secure Digital Music Iniciativa). A arquitectura dos cartas SD é baseada em circuitos de memória flash(EEPROM) de tipo NAND. A memória Secure Digital possui muito pequenas dimensões (24.0mm x 32.0mm x 2.1mm), equivalentes às de um selo, e pesa 2 gramas. O acesso aos dados é realizado através de um conetor lateral que possui 9 pinos, permitindo atingir uma taxa de transferência de 2 Mb/s, e potencialmente até a 10 MB/s. O tempo de acesso à memória SD é cerca de de 25µs para o primeiro acesso e ciclos de 50 ns para os seguintes. SmartMedia A memória SmartMedia é um tipo de memória criada por Toshiba e Samsung. A sua arquitectura é baseada em circuitos de memória flash(EEPROM) de tipo NAND A memória SmartMedia possui muito pequenas dimensões (45.0mm x 37.0mm x 0.76mm. Existe dois tipos de cartas SmartMedia que possuem voltagens diferentes: As cartasSmartMedia 3.3V possuem uma ranhura à direita As cartas SmartMedia 5V possuem uma ranhura à esquerda O acesso aos dados é realizado através de uma microplaqueta que possui 22 pinos. Qualquer que seja a capacidade do carta Smartmedia, as dimensões e o lugar da microplaqueta são o mesma. O tempo de acesso à memória é cerca de de 25µs para o primeiro acesso e ciclos de 50 ns para os seguintes xD Picture card A memória xD Picture (para extremo Digital) é um tipo da memória criada Fuji e Olympus em agosto de 2002. A arquitetura das cartas xD é baseada em circuitos de memória flash(EEPROM) de tipo NAND. A memória xD picture card possui muito pequenas dimensões (20.0mm x 25.0mm x 1.7mm). O acesso aos dados é realizado através de um conetor lateral que possui 18 pinos, permitindo atingir uma taxa de transferência de 1.3 Mb/s e potencialmente até a 3 MB/s em escrita e de cerca de 5 Mb/s em leitura. Data table of selected memory card formats Name Acronym Form factor DRM PC Card PCMCIA 85.6 × 54 × 3.3 mm None CompactFlash I CF-I 43 × 36 × 3.3 mm None CompactFlash II CF-II 43 × 36 × 5.5 mm None SmartMedia SM / SMC 45 × 37 × 0.76 mm None Memory Stick MS 50.0 × 21.5 × 2.8 mm MagicGate Memory Stick Duo MSD 31.0 × 20.0 × 1.6 mm MagicGate Memory Stick PRO Duo MSPD 31.0 × 20.0 × 1.6 mm MagicGate Memory Stick PRO-HG Duo MSPDX 31.0 × 20.0 × 1.6 mm MagicGate Memory Stick Micro M2 M2 15.0 × 12.5 × 1.2 mm MagicGate Multimedia Card MMC 32 × 24 × 1.5 mm None Reduced Size Multimedia Card RS-MMC 16 × 24 × 1.5 mm None MMCmicro Card MMCmicro 12 × 14 × 1.1 mm None Secure Digital card SD 32 × 24 × 2.1 mm CPRM* SxS SxS Universal Flash Storage UFS miniSD card miniSD 21.5 × 20 × 1.4 mm CPRM* microSD card microSD 11 × 15 × 0.7 mm CPRM* xD-Picture Card xD 20 × 25 × 1.7 mm None Intelligent Stick iStick 24 x 18 x 2.8 mm None Serial Flash Module SFM 45 x 15 mm None µ card µcard 32 x 24 x 1 mm Unknown NT Card NT NT+ 44 x 24 x 2.5 mm None * - Content Protection for Recordable Media and Pre-Recorded Media (CPRM/CPPM) .
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