MB86434 Datasheet, PDF (15/38 Pages) Fujitsu Component Limited. – 5V Single Power Supply Audio Interface Unit (AIU)

MB86434
• Tone Generator Control Output Level
External pins
Address Address Tone generator
1110
0111 circuit operating
data bits data bits
mode
PSC2 PSC1 PSC0 TONC D2 D1 D0 D3 (SW2)
Tone
(1)
Tone
(2)
0
0
0
— ——— —
1
0
0
— ——— —
—
1 or 1
0 ——— 0
SGC SGC
—
1 or 1
0 ——— 1
SGC SGC
—
1 or 1
1 1 —— —
—
—
—
1 or 1
1 0 —— —
—
—
—
1 or 1
1 —1 1
0
SGC SGC
—
1 or 1
1 —1 0
0
SGC
—
1 or 1
1 —0 1
0
SGC
—
1 or 1
1 —0 0
0
(Condition: EV3 = 0 dB)
Output pin
mode
LED TONEO
Remarks
L
H-Z
L
H-Z
L
SGC
L
H-Z
L
—
—
—
SGC
— –10 dBv Single tone output
— –10 dBv Single tone output
— –10 dBv Dual tone output
: Operational, : Power down, H-Z : High-impedance, L: L-level fixed, SGC: SGC fixed
Note: When the TONC pin signal is L-level, the tone generator circuit counters will be reset. When a dual tone is
generated at the time of reset, the initial phase settings for tone Œ and tone  will be in phase.
• Example: When Tone (1), Tone (2) are at the same frequency:
TONE
Tone (1)
H
L
SGC
Tone (2)
SGC
15