TC58FVT160/B160AFT/AXB-70,-10

2002-08-06

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OPERATION MODES

In addition to the Read, Write and Erase Modes, the TC58FVT160/B160A features many functions including block

protection and data polling. When incorporating the device into a deign, please refer to the timing charts and

flowcharts in combination with the description below.

READ MODE

To read data from the memory cell array, set the device to Read Mode. In Read Mode the device can perform

high-speed random access as asynchronous ROM.

The device is automatically set to Read Mode immediately after power-on or on completion of automatic

operation. A software reset releases ID Read Mode and the lock state which the device enters if automatic

operation ends abnormally, and sets the device to Read Mode. A hardware reset terminates operation of the

device and resets it to Read Mode. When reading data without changing the address immediately after power-on,

either input a hardware Reset or change CE from H to L.

ID Read Mode

ID Read Mode is used to read the device maker code and device code. The mode is useful in that it allows

EPROM programmers to identify the device type automatically.

ID read can be executed in two ways, as follows:

returns the device to Read Mode.

(2) Input command sequence

Inputting an ID Read command sets to ID Read Mode. The maker code is output from address 00; the

device code is output from address 01. Inputting a Reset command releases ID Read Mode and returns the

device to Read Mode.

Access time in ID Read Mode is the same as that in Read Mode. For a list of the codes, please refer to the

ID Code Table.

Standby Mode

There are two ways to put the device into Standby Mode.

(1) Control using CE and RESET

(2) Control using RESET only

In Standby Mode DQ is put in High-Impedance state.

Auto-Sleep Mode

This function suppresses power dissipation during reading. If the address input does not change for 150 ns, the

Because the output data is latched, data is output in Sleep Mode. When the address is changed, Sleep Mode is

automatically released, and data from the new address is output.