NAND08GAH0A datasheet(82/116 Pages) NUMONYX

Part #	NAND08GAH0A

Description	1 Gbyte, 2 Gbyte, 1.8 V/3 V supply, NAND Flash memories with MultiMediaCard??interface

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Manufacturer	NUMONYX [Numonyx B.V]

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Timings

NAND08GAH0A, NAND16GAH0D

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9.3.3

Erase, Set and Clear Write Protect

The host must first select the groups to be erased using the ERASE_GROUP_START and

ERASE_GROUP_END commands (CMD35, CMD36). Once the ERASE command

(CMD38) is issued, all the selected erase groups are erased.

Similarly, SET_WRITE_PROT and CLR_WRITE_PROT commands start a write operation

as well. The device signals that it is busy by pulling the DAT0 line low for the duration of the

erase or program operation. The timing diagrams are identical to the

STOP_TRANSMISSION diagrams described in Figure 27.

9.3.4

Reselecting a busy device

When a busy device which is currently in the disable state is reselected, it reinstate its busy

signalling on the data line DAT0. The timing diagram for the command/response/busy

transaction is given in Figure 27.

9.4

Bus test procedure timing

When in transfer state, the host can initiate a bus test procedure. This is done by issuing

CMD19 command to the device. If there is no response to the CMD19, the host may

assume that this function is not supported by the device and should read the status from the

device by sending a CMD13 command.

Figure 28.

4-bit system bus test procedure

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S10

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AI13606

CMD

RSP19

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CMD6 RSP6

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