參數(shù)資料
型號(hào)： HB288016MM1
廠商： Hitachi,Ltd.
英文描述： MultiMediaCard 16 MByte
中文描述： 多媒體16字節(jié)
文件頁數(shù)： 12/79頁
文件大?。?/td> 233K
代理商： HB288016MM1
HB288016MM1
12
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 Version
SPEC_VERS
System specification version number
‘0010’
System specification version 2.11
The Spec version of the HB288016MM1 is related to the “MultiMediaCard system specification, Version
2.11”. The parameter SPEC_VERS has permanently the value 2.
TAAC
Defines the asynchronous data access time:
TAAC Access Time Definition
TAAC bit
Description
Values
2:0
time exponent
0 = 1 ns, 1 = 10 ns, 2 = 100 ns, 3 = 1
μ
s, 4 = 10
μ
s,
5 = 100
μ
s, 6 = 1 ms, 7 = 10 ms
6:3
time mantissa
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
7
reserved
always ‘0’
The value for the asynchronous delay for the HB288016MM1 is 1 ms. The coded TAAC value is 0x0E (=
1 ms). For more details refer to Chapter “Operating Characteristics”.
NSAC
Defines the worst case for the synchronous data access time. N
AC
is defined as 100*NSAC clock cycles,
where NSAC presents a binary value. Max. value for the data access time N
AC
is 25.6k clock cycles. The
total access time is the sum of both TAAC and N
AC
*clock period. The value of NSAC for the
HB288016MM1 is 0x01 (100 cycles). For more details refer to Chapter “Operating Characteristics”.
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