NAND08GAH0A NUMONYX [Numonyx B.V], NAND08GAH0A Datasheet - Page 44

• Manufacturer Part Number: NAND08GAH0A
• Manufacturer: NUMONYX [Numonyx B.V]

Commands
6
6.1
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Commands
There are four kinds of commands defined on the bus:
●
●
●
●
All commands are 48 bits long, and are protected by a CRC. The command transmission
always starts with the MSB (see
Command classes
The command set of the device is divided into several classes (See
Each class supports a set of MultiMediaCard functions.
Class 0 is mandatory and supported by all MultiMediaCards. The other classes are optional
and can be interpreted as a tool box. By using different classes, several configurations can
be chosen (e.g. a block writable device). The supported Card Command Classes (CCC) are
coded as a parameter in the Card Specific Data (CSD) register of each device, providing the
host with information on how to access the device.
Table
commands.
received.
Table 17.
Width (bits)
Value
Description
Bit position
Broadcast commands (bc)—sent on CMD, no response
Broadcast commands with response (bcr)— sent on CMD, response (all devices
simultaneously) on CMD
Addressed (point-to-point) commands (ac)—sent on CMD, response on CMD
Addressed (point-to-point) data transfer commands (adtc)—sent on CMD, response on
CMD, data transfer on DAT.
20,
Table
Table 27
MultiMediaCard command format
21,
Start bit
47
‘0’
1
Table
defines the device state transitions depending on the command
22,
Table 23
Host
46
‘1’
1
Table 17: MultiMediaCard command
and
Command
45...40
Table 24
6
x
define in detail the device bus
Argument
NAND08GAH0A, NAND16GAH0D
39...8
32
x
Table 18
CRC7
format).
7...1
7
x
and
Table
End bit
‘1’
0
1
19).