Advanced

CAT28C512/513

8

Doc. No. 25074-00 2/98

DATA

DATA

DATA

DATA

DATA Polling

DATA polling is provided to indicate the completion of

write cycle. Once a byte write or page write cycle is

initiated, attempting to read the last byte written will

are indeterminate) until the programming cycle is com-

plete. Upon completion of the self-timed write cycle, all

I/O’s will output true data during a read cycle.

Toggle Bit

In addition to the

DATA Polling feature of the CAT28C512/

513, the device offers an additional method for determin-

ing the completion of a write cycle. While a write cycle is

in progress, reading data from the device will result in I/

be read from the device.

Figure 7. DATA Polling

Figure 8. Toggle Bit

Note:

(1)

ADDRESS

28C512-513 F10

CE

WE

OE

I/O7

DIN = X

DOUT = X

DOUT = X

tOE

tOEH

tWC

tOES

28C512-513 F11

WE

CE

OE

I/O6

tOEH

tOE

tOES

tWC

(1)

(1)