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MC12U512HBVC-0QC00 Folha de dados(PDF) 24 Page - Samsung semiconductor |
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MC12U512HBVC-0QC00 Folha de dados(HTML) 24 Page - Samsung semiconductor |
24 / 66 page MultiMediaCard TM 24 SPEC_VERS Defines the Spec version supported by the card. It includes the commands set definition and the definition of the card responses. The card identification procedure is compatible for all spec versions. SPEC_VERS System specification version number “0011” System specification version 3.31 The Spec version of these Samsung MultiMediaCards is related to the “MultiMediaCard system specification,Version 3.31”. The parameter SPEC_VERS has permanently the value “0011”. TAAC Defines the asynchronous data access time: TAAC bit Description Values 2:0 Time exponent 0 = 1 ns, 1 = 10 ns, 2 = 100 ns, 3 = 1 ms, 4 = 10 ms, 5= 100 ms, 6 = 1 ms, 7 = 10 ms 6:3 Time mantissa 0 = reserved, 1 = 1.0, 2 = 1.2, 3 = 1.3, 5 = 1.5, 5 = 2.0, 6 = 2.5, 7 = 3.0, 8 = 3.5, 9 = 4.0, A = 4.5,B = 5.0, C = 5.5, D = 6.0, E = 7.0, F = 8.0 7 Reserved Always ‘0’ The value for the asynchronous delay for these MultiMediaCards is 1.5 ms. The coded TAAC value is 0x26 (= 1.5 ms). NSAC Defines the worst case for synchronous data access time. The unit for NSAC is 100-clock cycles. Therefore, maximum value for the data access time is 25.6K clock cycles. The total access time NAC as expressed in the Table “Timing Values” is the sum of both TAAC and NSAC. It has to be computed by the host for actual clock rate. The read access time should be interpreted as a typical delay for the first data bit of a data block or stream. The value of NSAC for these MultiMediaCards is 0x01 (100-clock cycles). For more details refer to Chapter “Operating Characteristics”. TRAN_SPEED The following table defines the maximum data transfer rate TRAN_SPEED: Maximum Data Transfer Rate Definition TRAN_SPEED bit Description Values 2:0 Transfer rate exponent 0 = 100 kbit/s, 1 = 1 Mbit/s, 2 = 10 Mbit/s, 3 = 100 Mbit/s, 4...7 = reserved 6:3 Time mantissa 0x0 = reserved, 0x1 = 1.0, 0x2 = 1.2, 0x3 = 1.3, 0x4 = 1.5, 0x5 = 2.0, 0x6 = 2.5, 0x7 = 3.0, 0x8 = 3.5, 0x9 = 4.0, 0xA = 4.5, 0xB = 5.0, 0xC = 5.5, 0xD |
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Descrição semelhante - MC12U512HBVC-0QC00 |
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