M34C00

6/15

Figure 6. Byte Write Sequences (showing differences in Acknowledge bits)

BYTE WRITE

in Array-1 and Array-2

(and in Array-0, if unprotected)

DEV SEL

BYTE ADDR

DATA IN

AI03715B

ACK

NO ACK

NO ACK

R/W

DEV SEL

BYTE ADDR

DATA IN

ACK

ACK

ACK

R/W

BYTE WRITE

in Array-0, if protected

Figure 7. Write Cycle Polling Flowchart using ACK

WRITE Cycle in Progress

(to be followed by a READ)

AI03716B

START Condition

DEVICE SELECT

with RW = 1

ACK

Returned

Yes

No

Read Data Byte

ACK

NoACK

STOP

Continue

the Sequential

Read

Yes

No

WRITE Cycle in Progress

(to be followed by a WRITE)

START Condition

DEVICE SELECT

with RW = 0

ACK

Returned

Yes

No

Send Address Byte

ReSTART

STOP

Next

Operation is a

Write

Yes

No

ACK

Send Data Byte

ACK

STOP