hb288064mm1 Renesas Electronics Corporation., hb288064mm1 Datasheet - Page 12

• Manufacturer Part Number: hb288064mm1
• Description: Multimediacard 64 Mbyte
• Manufacturer: Renesas Electronics Corporation.

HB288064MM1
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
‘0010’
The Spec version of the HB288064MM1 is related to the “MultiMediaCard system specification, Version
2.11”. The parameter SPEC_VERS has permanently the value 2.
Defines the asynchronous data access time:
TAAC Access Time Definition
TAAC bit
2:0
6:3
7
The value for the asynchronous delay for the HB288064MM1 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. N
where NSAC presents a binary value. Max. value for the data access time N
total access time is the sum of both TAAC and N
HB288064MM1 is 0x01 (100 cycles). For more details refer to Chapter “Operating Characteristics”.
12
SPEC_VERS
TAAC
NSAC
Description
time exponent
time mantissa
reserved
System specification version number
System specification version 2.11
Values
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’
AC
*clock period. The value of NSAC for the
AC
is defined as 100*NSAC clock cycles,
AC
is 25.6k clock cycles. The