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What steps should be taken to ensure correct operation of the device?

Latest Updated:03/25/2009

Question:

If the RTC is not required in an application, what steps should be taken to ensure correct operation of the device?

Answer:

Be sure to connect Vcc-RTC and Vss-RTC to a power supply even when not using RTC. Do not connect anything to XTAL2.

SH7709S, SH7729R, SH7706, SH7727: Please pull up EXTAL2 to Vcc (Internal Power supply).

SH7705: Please pull up EXTAL2 to VccQ (I/O power supply).

SH7720: Please pull up EXTAL_RTC to VccQ_RTC.

For details, please refer to the hardware manual "Appendix A Treatment of Unused Pins".

Suitable Products
SH7729R
SH7727
SH7720
SH7709S
SH7706
SH7705