HY27UF084G2M データシートの表示（PDF） - Hynix Semiconductor

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HY27UF084G2M

4Gbit (512Mx8bit) NAND Flash

Hynix Semiconductor 

HY27UF084G2M Series

4Gbit (512Mx8bit) NAND Flash

2. BUS OPERATION

There are six standard bus operations that control the device. These are Command Input, Address Input, Data Input,

Data Output, Write Protect, and Standby.

Typically glitches less than 5 ns on Chip Enable, Write Enable and Read Enable are ignored by the memory and do not

affect bus operations.

2.1 Command Input.

Command Input bus operation is used to give a command to the memory device. Command are accepted with Chip

Enable low, Command Latch Enable High, Address Latch Enable low and Read Enable High and latched on the rising

edge of Write Enable. Moreover for commands that starts a modifying operation (write/erase) the Write Protect pin

must be high. See figure 5 and table 12 for details of the timings requirements. Command codes are always applied on

IO7:0, disregarding the bus configuration (X8).

2.2 Address Input.

Address Input bus operation allows the insertion of the memory address. To insert the 29 addresses needed to access

the 4Gbit 5 clock cycles are needed. Addresses are accepted with Chip Enable low, Address Latch Enable High, Com-

mand Latch Enable low and Read Enable high and latched on the rising edge of Write Enable. Moreover for commands

that starts a modify operation (write/erase) the Write Protect pin must be high. See figure 6 and table 12 for details of

the timings requirements. Addresses are always applied on IO7:0, disregarding the bus configuration (X8).

2.3 Data Input.

Data Input bus operation allows to feed to the device the data to be programmed. The data insertion is serially and

timed by the Write Enable cycles. Data are accepted only with Chip Enable low, Address Latch Enable low, Command

Latch Enable low, Read Enable High, and Write Protect High and latched on the rising edge of Write Enable. See figure

7 and table 12 for details of the timings requirements.

2.4 Data Output.

Data Output bus operation allows to read data from the memory array and to check the status register content, the ID

data. Data can be serially shifted out toggling the Read Enable pin with Chip Enable low, Write Enable High, Address

Latch Enable low, and Command Latch Enable low. See figures 8,10,11 and table 12 for details of the timings require-

ments.

2.5 Write Protect.

Hardware Write Protection is activated when the Write Protect pin is low. In this condition modify operation do not

start and the content of the memory is not altered. Write Protect pin is not latched by Write Enable to ensure the pro-

tection even during the power up.

2.6 Standby.

In Standby mode the device is deselected, outputs are disabled and Power Consumption is reduced.

Rev. 0.7 / Dec. 2006

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