AT28C256

6.1 Operating Modes

Table 6-1. Operating Modes
Mode	CE	OE	WE	I/O
Read	V_IL	V_IL	V_IH	D_OUT
Write⁽¹⁾	V_IL	V_IH	V_IL	D_IN
Standby/Write Inhibit	V_IH	X⁽²⁾	X	High-Z
Write Inhibit	X	X	V_IH
Write Inhibit	X	V_IL	X
Output Disable	X	V_IH	X	High-Z
Chip Erase	V_IL	V_H⁽³⁾	V_IL	High-Z

Note:

Refer to AC Programming Waveforms.
X can be V_IL or V_H.
V_H = 12.0 V ± 0.5V

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