Datasheet

Datasheet

9/18

TSZ02201-0R2R0G100270-1-2

© 2012 ROHM Co., Ltd. All rights reserved.

10.Jul.2012 Rev.001

www.rohm.com

TSZ22111・15・001

BR24C21xxx Series (1K)

●Command Cancellation By Start And Stop Condition

During a command input, command is canceled by the successive inputs of start condition and stop condition (Figure 15.).

However, during ACK or data output, the device may output the SDA line Low. In such cases, operation of start and stop

condition is impossible, making the reset inoperable. Execute the software reset in the cases. (Figure 13.)

Operating the command cancel by start and stop condition during the command of Random Read or Sequential Read or

Current Read, internal address counter is not confirmed. Therefore operation of Current Read after this is not valid. Operate

a Random Read in this case.

Figure 15. Command Cancellation

●I/O Circuit

○SDA Pin Pull-up Resister

considering VIL, IL characteristics of a controller which control the device and VOH, IOL characteristics of the device. If

○Maximum Rpu

1)

Other timing must keep the conditions of AC spec.

②When SDA bus is High, the voltage ○

A

of SDA bus determined by a total input leak(IL) of the all devices connected to

∴

≦

IL

IL=10µA

According to ②

0.8x3-0.7x3

≦

10x10

-6

≦

300 [k

Ω]

THE CAPACITANCE OF

BUS LINE (CBUS)

SDA PIN

A

IL

IL

MICRO

COMPUTER

Figure 16. I/O Circuits

SCL

SDA

1

1

0

0

Start

Condition

Stop

Condition