34AA04T-ESLASHST datasheet(9/36 Pages) MICROCHIP

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DS20005271B-page 9

34AA04

5.2

Read Bank Address (RBA)

The Read Bank Address (RBA) command allows the

34AA04 to indicate which array bank is currently

selected.

The master generates a Start condition and transmits

the RBA control byte (Table 5-2), with the R/W bit set

to logic ‘1’. If Bank 0 is currently selected, the 34AA04

will respond with an Acknowledge signal. If Bank 1 is

currently selected, an Acknowledge will not be

generated. Regardless of the result, the master must

read at least one dummy byte from the 34AA04,

transmitting a Not Acknowledge signal after each byte,

and generate a Stop condition to end the command

(Figure 5-2).

FIGURE 5-2:

READ BANK ADDRESS

Bus Activity

Master

SDA Line

Bus Activity

Control

Byte

Dummy

Byte

Note 1:

The 34AA04 will only acknowledge if Bank 0 is currently selected.

110

In accordance with the JEDEC spec, the master is allowed to read multiple dummy bytes,

transmitting a Not Acknowledge after each byte.

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