MB85RC64A

DS501-00019-5v2-E

9

• Sequential Read

Data can be received continuously following the Device address word (R/W “1” input) after specifying the

address in the same way as for Random Read. If the read reaches the end of address, the internal read

address automatically rolls over to first memory address 0000H and keeps reading.



SOFTWARE RESET SEQUENCE OR COMMAND RETRY

In case the malfunction has occurred after power on, the master side stopped the I2C communication during

processing, or unexpected malfunction has occurred, execute the following (1) software recovery sequence

just before each command, or (2) retry command just after failure of each command.

(1) Software Reset Sequence

Since the slave side may be outputting “L” level, do not force to drive “H” level, when the master side drives

the SDA port. This is for preventing a bus conflict. The additional hardware is not necessary for this software

reset sequence.

(2) Command Retry

Command retry is useful to recover from failure response during I2C communication.

Stop Condition

ACK (SDA is the "L" level)

A

P

NACK (SDA is the "H" level)

N

AA

A

N P

Read

Data 8bits

Read

Data 8bits

Read

Data

...

...

Access from master

Access from slave

SCL

SDA

9 set of “Start Conditions and one “1” data”

Send “Start Condition and one data “1””.

Repeat these 9 times just before Write or Read command.

Hi-Z state by pull up Resistor