hb28b128mm2 Renesas Electronics Corporation., hb28b128mm2 Datasheet - Page 27
hb28b128mm2
Manufacturer Part Number
hb28b128mm2
Description
Multimediacard 16 Mbyte/32 Mbyte/64 Mbyte/128 Mbyte
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HB28B128MM2.pdf
(90 pages)
- Current page: 27 of 90
- Download datasheet (679Kb)
The command transmission always starts with the MSB. Each command starts with a start bit and ends with
a 7-bit CRC command protection field followed by an end bit. The length of each command frame is fixed
to 48 bits (2.4 µs at 20 MHz):
The start bit is always ‘0’ in command frames (sent from host to MultiMediaCard). The host bit is always
‘1’ for commands. The command field contains the binary coded command number. The argument
depends on the command (refer to Table “Basic Commands (class 0) and Table “Block-Oriented Read
Commands (class 2)”). The CRC field is defined in Chapter “Cyclic Redundancy Check (CRC)”.
Note: 1. (Cyclic Redundancy Check)
0
start bit
1
host
bit5...bit0
command
bit31...bit0
argument
HB28H016/D032/B064/B128MM2
bit6...bit0
CRC*
1
Rev.5.0, Jan. 2003, page 25 of 88
1
end bit
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