CAT28HT256 datasheet(7/10 Pages) CATALYST

7 / 10 page

CAT28HT256

8-97

Advanced

Stock No. 21065-03 2/98

Figure 6. Page Mode Write Cycle

ADDRESS

I/O

tWP

tBLC

BYTE 0

BYTE 1

BYTE 2

BYTE n

BYTE n+1

BYTE n+2

LAST BYTE

tWC

5096 FHD F10

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

output the complement of that data on I/O7 (I/O0–I/O6

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

CAT28HT256, the device offers an additional method

for determining the completion of a write cycle. While a

write cycle is in progress, reading data from the device

will result in I/O6 toggling between one and zero. How-

ever, once the write is complete, I/O6 stops toggling and

valid data can be read from the device.

Figure 7.

DATA

DATA Polling

5096 FHD F11

ADDRESS

I/O7

DIN = X

DOUT = X

tOE

tOEH

tWC

tOES

Figure 8. Toggle Bit

I/O6

tOEH

tOE

tOES

tWC

(1)

5096 FHD F12

Note:

(1)

Beginning and ending state of I/O6 is indeterminate.

CAT28HT256 Arkusz danych(PDF) 7 Page - Catalyst Semiconductor

CAT28HT256 Arkusz danych(HTML) 7 Page - Catalyst Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10

Arkusz danych Pobierz

Link URL