bu9768ak ROHM Co. Ltd., bu9768ak Datasheet - Page 19

• Manufacturer Part Number: bu9768ak
• Description: Driver Segmented Module With Input Function
• Manufacturer: ROHM Co. Ltd.

•
(1) Using the product with the synchronous clock stopped
If the synchronous clock is to be stopped during the period that data is not being transmitted, program the product so
that the rise of CK is input at least twice after the fall of CS.
(2) Precautions concerning key scans when the power supply is turned on
To carry out a key scan immediately after the power supply is turned on, without transmitting data, the parameters
must be set so that the following conditions are met.
1) The rise of the synchronous clock pulse is input to the CK pin at least twice.
2) Since input can only be received from keys on the KO
Standard ICs
Operation notes
If data is being transferred before a key scan is carried out, after the power supply is turned on, these precautions
do not apply.
such as interrupts. (For information on the status when the power supply is turned on, please see page 11.)
CS
CK
CS
CK
Fig. 16 When CK is stopped at LOW
Fig. 15 When CK is stopped at HIGH
3
to KO
6
line, other keys should not be used for functions
BU9768AK / BU9768AKV
CK rises at least twice
CK rises at least twice
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