10/16

・Digital part

Input such as clock, data is to input "H" or "L" properly about each digital input terminal to contain at the time of standing

by as well.

If you turn off the power (When Hi-z is input), a control side is to avoid an input terminal's becoming open in either

following method It has the possibility that penetration electric current occurs because it becomes the input which isn't

fixed as BU7831KN when it isn't avoided.

a） Terminal, in less than 10kΩ, pull-down

b） Terminal, pull-up

c） When it becomes input Hi-z, "L" is given to it.

・CPU interface

Fig.26

SDATA will be confirmed by 16

register by NCS falling edge. The data format is 16bit rear.

CPU I/F is 1Byte=16bit. Because it doesn't cope with continuous data transmission, you must surely insert the section of

NCS= "H" between 1st Byte and 2nd Byte. The following the is to secure time beyond the SCLK 1 clock. （th≧tcyc）

NCS

SCL

SDATA

th

Fig.27

A7

SCLK

SDATA

tcs

NCS

tds

tdh

A6

D6

D5

D4

D3

D2

D1

D0

A5

A4

A3

A2

D7

A1

tch

tcyc

A0