MB86434 Datasheet, PDF (14/38 Pages) Fujitsu Component Limited. – 5V Single Power Supply Audio Interface Unit (AIU)

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