9

s FUNCTIONAL DESCRIPTION

Read Mode

The MBM29F040C has two control functions which must be satisfied in order to obtain data at the outputs. CE

is the power control and should be used for a device selection. OE is the output control and should be used to

gate data to the output pins if a device is selected.

enable access time is the delay from the falling edge of OE to valid data at the output pins (assuming the

Standby Mode

standby mode the outputs are in a high impedance state, independent of the OE input.

If the device is deselected during erasure or programming, the device will draw active current until the operation

is completed.

Output Disable

to be in a high impedance state.

Autoselect

The autoselect mode allows the reading out of a binary code from the device and will identify its manufacturer

and type. This mode is intended for use by programming equipment for the purpose of automatically matching

the device to be programmed with its corresponding programming algorithm. This mode is functional over the

entire temperature range of the device.

The manufacturer and device codes may also be read via the command register, for instances when the

sequence is illustrated in Table 5. (Refer to Autoselect Command section.)

identifier code (MBM29F040C = A4H). These two bytes are given in the Table 3. All identifiers for manufactures