M58WR064HT datasheet(12/111 Pages) NUMONYX

Part #	M58WR064HT

Description	64 Mbit (4Mb x16, Multiple Bank, Burst) 1.8V supply Flash memories

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Manufacturer	NUMONYX [Numonyx B.V]

Direct Link	http://www.numonyx.com

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Signal descriptions

M58WR064HT, M58WR064HB

12/111

2

Signal descriptions

See Figure 1: Logic Diagram and Table 1: Signal Names, for a brief overview of the signals

connected to this device.

2.1

Address Inputs (A0-A21)

The Address Inputs select the cells in the memory array to access during Bus Read

operations. During Bus Write operations they control the commands sent to the Command

Interface of the Program/Erase Controller.

2.2

Data Input/Output (DQ0-DQ15)

The Data I/O output the data stored at the selected address during a Bus Read operation or

input a command or the data to be programmed during a Bus Write operation.

2.3

Chip Enable (E)

The Chip Enable input activates the memory control logic, input buffers, decoders and

sense amplifiers. When Chip Enable is at VILand Reset is at VIH the device is in active

mode. When Chip Enable is at VIH the memory is deselected, the outputs are high

impedance and the power consumption is reduced to the standby level.

2.4

Output Enable (G)

The Output Enable input controls data outputs during the Bus Read operation of the

memory.

2.5

Write Enable (W)

The Write Enable input controls the Bus Write operation of the memory’s Command

Interface. The data and address inputs are latched on the rising edge of Chip Enable or

Write Enable whichever occurs first.

2.6

Write Protect (WP)

Write Protect is an input that gives an additional hardware protection for each block. When

Write Protect is at VIL, the Lock-Down is enabled and the protection status of the Locked-

Down blocks cannot be changed. When Write Protect is at VIH, the Lock-Down is disabled

and the Locked-Down blocks can be locked or unlocked. (refer to Table 15: Lock Status).

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