BR24L08-W / BR24L08F-W / BR24L08FJ-W

Memory ICs

BR24L08FV-W / BR24L08FVM-W

11/25

Current read

SDA

LINE

S

T

A

R

T

SLAVE

ADDRESS

11

R

/

W

A

C

K

A

C

K

DATA

S

T

O

P

00 A2 P1 P0

D7

D0

R

E

A

D

Fig.10 CURRENT READ CYCLE TIMING

• In case that the previous operation is Random or Current Read (which includes Sequential Read respectively), the

internal address counter is increased by one from the last accessed address (n).

Thus Current Read outputs the data of the next word address (n

+1).

If the last command is Byte or Page Write, the internal address counter stays at the last address (n).

Thus Current Read outputs the data of the word address (n).

• If an Acknowledge is detected, and no STOP condition is generated by the master (µ-COM), the device will continue

to transmit the data.

[ It can transmit all data (8kbit 1024word) ]

• If an Acknowledge is not detected, the device will terminate further data transmissions and await a STOP condition

before returning to the standby mode.

Note) If an Acknowledge is detected with “Low” level, not “High” level, command will become Sequential Read.

So the device transmits the next data, Read is not terminated. In the case of terminating Read, input

Acknowledge with “High” always, then input stop condition.

Random read

SLAVE

ADDRESS

SDA

LINE

S

T

A

R

T

11

0

0 A2 P1 P0

A2A1PS

R

/

W

W

R

I

T

E

Fig.11 RANDOM READ CYCLE TIMING

S

T

O

P

A

C

K

R

E

A

D

DATA(n)

SLAVE

ADDRESS

S

T

A

R

T

R

/

W

A

C

K

11

0

0

D7

D0

WA

0

WA

7

WORD

ADDRESS(n)

A

C

K

A

C

K

• Random read operation allows the master to access any memory location indicated word address.

• If an Acknowledge is detected, and no STOP condition is generated by the master (µ-COM), the device will continue to

transmit the data.

[ It can transmit all data (8kbit 1024word) ]

• If an Acknowledge is not detected, the device will terminate further data transmissions and await a STOP condition

before returning to the standby mode.

Note) If an Acknowledge is detected with “Low” level, not “High” level, command will become Sequential Read.

So the device transmits the next data, Read is not terminated. In the case of terminating Read, input

Acknowledge with “High” always, then input stop condition.