hb28j128mm3 Renesas Electronics Corporation., hb28j128mm3 Datasheet - Page 13
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hb28j128mm3
Manufacturer Part Number
hb28j128mm3
Description
Multimediacard 32 Mbyte/64 Mbyte/128 Mbyte/256 Mbyte/512 Mbyte
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HB28J128MM3.pdf
(91 pages)
- Current page: 13 of 91
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HB28K032/L064/J128/J256/J512MM3, HB28K032/L064/J128/J256RM3
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 Version
SPEC_VERS
“0011”
The Spec version of these Renesas MultiMediaCards is related to the “MultiMediaCard system
specification, Version 3.3”. The parameter SPEC_VERS has permanently the value “0011”.
Defines the asynchronous data access time:
TAAC Access Time Definition
TAAC bit
2:0
6:3
7
The value for the asynchronous delay for these Renesas MultiMediaCards is 1 ms. The coded TAAC value
is 0x0E (= 1 ms). For more details refer to Chapter “Operating Characteristics”.
Defines the worst case for the 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 N
expressed in the Table “Timing Values” is the sum of both TAAC and NSAC. It has to be computed by
the host for the 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 Renesas MultiMediaCards is 0x01 (100-
clock cycles). For more details refer to Chapter “Operating Characteristics”.
Rev.0.02, Sep.15.2004, page 13 of 89
SPEC_VERS
TAAC
NSAC
Description
Time exponent
Time mantissa
Reserved
System specification version 3.3
0 = 1 ns, 1 = 10 ns, 2 = 100 ns, 3 = 1 s, 4 = 10 s,
5 = 100 s, 6 = 1 ms, 7 = 10 ms
0 = reserved, 1 = 1.0, 2 = 1.2, 3 = 1.3, 4 = 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
Always ‘0’
System specification version number
Values
AC
as
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