MB9B520M datasheet(49/113 Pages) SPANSION

49 / 113 page

D a t a S h e e t

MB9B520M_DS706-00048-3v0-E, March 18, 2015

CONFIDENTIAL

 Notes on power-on

Turn power on/off in the following order or at the same time.

If not using the A/D converter and D/A converter, connect AVCC = VCC and AVSS = VSS.

Turning on : VCC → USBVCC

VCC → AVCC → AVRH

Turning off : USBVCC → VCC

AVRH → AVCC → VCC

 Serial Communication

There is a possibility to receive wrong data due to the noise or other causes on the serial communication.

Therefore, design a printed circuit board so as to avoid noise.

Consider the case of receiving wrong data due to noise, perform error detection such as by applying a

checksum of data at the end. If an error is detected, retransmit the data.

 Differences in features among the products with different memory sizes and between

Flash memory products and MASK products

The electric characteristics including power consumption, ESD, latch-up, noise characteristics, and

oscillation characteristics among the products with different memory sizes and between Flash memory

products and MASK products are different because chip layout and memory structures are different.

If you are switching to use a different product of the same series, please make sure to evaluate the electric

characteristics.

 Pull-Up function of 5 V tolerant I/O

Please do not input the signal more than VCC voltage at the time of Pull-Up function use of 5 V tolerant

I/O.

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