HB28E016MM2 View Datasheet(PDF) - Hitachi -> Renesas Electronics

Part Name

Description

Manufacturer

HB28E016MM2

MultiMediaCard™ 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte

Hitachi -> Renesas Electronics 

HB28E016/D032/D064/B128MM2

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):

0

1

bit5...bit0 bit31...bit0

start bit host command argument

Note: 1. (Cyclic Redundancy Check)

bit6...bit0

CRC*1

1

end bit

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)”.

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