AVH308 View Datasheet(PDF) - APLUS INTEGRATED CIRCUITS

Part Name

Description

Manufacturer

AVH308

Single-Chip Voice Synthesizing CMOS IC

APLUS INTEGRATED CIRCUITS 

AVxx08 Series

(C). Busy_Low active : low active signal output during playing.

(D). LED 3Hz flash : 3Hz sink signal output for driving LED during playing at 6kHz sample rate.

(E). LED 6Hz flash : 6Hz sink signal output for driving LED during playing at 6kHz sample rate.

(F). LED dynamic 2/4 : dynamic sink signal output for driving LED during playing.

※ Where (D) and (E) is the LED flash rate at 6kHz sample rate. For different sample rate, the LED flash

rate is different from original 3Hz or 6Hz.

(9). PWM1 and PWM2 can directly drive buzzer or 8, 16, 32 or 64 ohms speaker.

(10). The voice_section length of “voice length + mute length” must be the multiple of 80Hex (AVH308 ) or

100Hex (AV0708 , AV1408 , AV2108 ).

(11). In voice_section sequence arrangement (00~07), If there are some voice_sections with only mute and

without voice, they should be put next to the last voice_section with voice. Besides, that is not allowed to

put a pure mute voice_section between 2 voice_sections with voice, or put the pure mute voice_section

on first place (00).

(12). Oscillator selection:

(A). External oscillator: Connect OSC pin to Vdd with a resistor, Rosc.

(B). Internal oscillator: Connect OSC pin to GND. (Not suggested because of frequency shift and system

stability)

※Input Type Description:

Option

CDS + 1M

CDS

Description

Normal selection for button trigger.

Only 1M pull-low resistance when key-pressed, and 1M+300K(parallel) pull-low resistance

when key-released.

Internal 300K ohms pull-low resistance, usually for photo-resistor trigger.

1M pull-low Internal 1M ohms pull-low resistance, reserve for some special applications.

10M pull-low Internal 10M ohms weak pull-low, usually for touching trigger.

Floating

No internal resistor connection, usually connected to other output pin or connected to GND

by an external resistor.

* 10M pull-low option is not available for IO1 input.

Trigger

PAD

Buffer

10M

Pull-Low

1M

Pull-Low

300K

Latch

2

Rev 1.3 2003/9/18

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