MB86434 Просмотр технического описания (PDF) - Fujitsu

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MB86434

5V Single Power Supply Audio Interface Unit (AIU)

Fujitsu 

MB86434

Also, by connecting a capacitor between the TENV pin and the ground, it is possible to generate an envelope for

the tone waveform. Set address 0111 data bit D2 to 1 to generate. If an envelope is generated, silencing must be

applied by an L-level signal from the TONC pin. The type of envelope that can be generated can be calculated

approximately from the following formula.

TENV

C

TONEO

Time t required for V0/V1 = 2.7 (in ms) = 15 * C (in µF)

V0

V1

T

TONC

(inside IC)

Address0111

D2

• LED Output Controls

Output from the LED output pins can be controlled by the TONC signal and the address 1110 data bit D2. When

the TONC signal is H-level, and the address 1110 data bit D2 value is L-level, the output level will be high. Output

levels are CMOS levels.

Address 1110

DATA — — D 2 —

TONC

LED

: Disable

14

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